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Home >> Ford >> 2004 >> Excursion 6.0 P, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 214 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Test N: Restraint System-Crash Sensor Status (DTC B2296) >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

A crash sensor status fault could be caused by faulty wiring, terminals or connectors, faulty crash sensor, incorrect crash sensor mounting or faulty RCM.

  1. Check for hard or intermittent DTC

    Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). See USING SCAN TOOL  under DIAGNOSTICS. Turn ignition switch to ON position. Retrieve and record any continuous Diagnostic Trouble Codes (DTCs). See RETRIEVING FAULT CODES  under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST  under DIAGNOSTICS. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, fault is hard. If flagged fault of "?" was recorded, multiple faults exist and entire test must be carried out before replacing RCM.
    • For left front side crash sensor (F-D-SEN) with mounting (COMM) fault, go to next step.
    • For left front side crash sensor (F-D-SEN) with internal (INT) fault, replace left front side curtain air bag sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Go to step  54 .
    • For left front side crash sensor (FD-SEN2) with short to battery (-B-) fault, go to step  6 .
    • For left front side crash sensor (FD-SEN2) with short to ground (--G) fault, go to step  7 .
    • For left front side crash sensor (F-DSEN2) with communications (COM) fault, go to step  8 .
    • For right front side crash sensor (F-P-SEN) with mounting (COMM) fault, go to step  12 .
    • For right front side crash sensor (FP-SEN2) with internal (INT) fault, replace right front side curtain air bag sensor. Go to step  54 .
    • For right front side crash sensor (F-P-SEN) with short to battery (-B-) fault, go to step  16 .
    • For right front side crash sensor (FP-SEN2) with short to ground (--G) fault, go to step  17 .
    • For right front side crash sensor (FP-SEN2) with communications (COM) fault, go to step  18 .
    • For left rear side crash sensor (D-2-SEN) with mounting (COMM) fault, go to step  22 .
    • For left rear side crash sensor (D-2-SEN) with internal (INT) fault, replace left rear side curtain air bag sensor. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Go to step  54 .
    • For left rear side crash sensor (D2--SEN2) with short to battery (-B-) fault, go to step  26 .
    • For left rear side crash sensor (D2--SEN2) with short to ground (--G) fault, go to step  27 .
    • For left rear side crash sensor (D2-SEN2) with communications (COM) fault, go to step  28 .
    • For right rear side crash sensor (P-2-SEN) with mounting (COMM) fault, go to step  32 .
    • For right rear side crash sensor (P-2-SEN) with internal (INT) fault, replace right rear side curtain air bag sensor. Go to step  54 .
    • For right rear side crash sensor (P2--SEN2) with short to battery (-B-) fault, go to step  36 .
    • For right rear side crash sensor (P2--SEN2) with short to ground (--G) fault, go to step  37 .
    • For right rear side crash sensor (P-2-SEN) with communications (COM) fault, go to step  38 .
    • For front crash sensor (FNT-SEN) with mounting (COMM) fault, Go to step  42 .
    • For front crash sensor (FNT-SEN) with internal (INT) fault, replace front crash sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Go to step  54 .
    • For front crash sensor (F-SEN) with short to battery (-B-) fault, go to step  46 .
    • For front crash sensor (F-SEN) with short to ground (--G) fault, go to step  47 .
    • For front crash sensor (F-SEN) with communications (COM) fault, Go to step  48 .

    If DTC B2296 was not retrieved, fault is intermittent. Go to step  53 .

  2. Check left front side crash sensor mounting

    Turn ignition switch to OFF position. Access left front side crash sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Ensure mounting bolt is fully seated and tightened correctly, and harness connector is properly connected. See TORQUE SPECIFICATIONS  . Remove left front side crash sensor. Visually inspect sensor mounting bracket for damage, corrosion or dirt. If any problems were found, clean tighten or repair mounting surface as necessary. Reinstall sensor and go to step  54 . If no problems were found, go to next step.

  3. Repeat on-demand self-test

    Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install left front side crash sensor. Turn ignition switch to ON position. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, fault is corrected. Go to step  54 .

  4. Check left front side crash sensor ground circuit for high resistance

    Turn ignition switch to OFF position. Disconnect left front side crash sensor harness connector. Measure resistance in Brown/Light Green wire (circuit No. 1262) between left front side crash sensor case ground and harness side of left front side crash sensor connector. See WIRING DIAGRAMS  . If resistance is less than 100 ohms, go to step  7 . If resistance is more than 100 ohms, go to next step.

  5. Clean left front side crash sensor mounting & repeat on-demand self-test

    Remove left front side crash sensor. Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install left front side crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, fault is corrected. Go to step  54 .

  6. Check left front side crash sensor circuits for short to battery between RCM & sensor

    Turn ignition switch to OFF position. Access left front side crash sensor and disconnect harness connector. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Turn ignition switch to ON position. Measure voltage in White/Light Green wire (circuit No. 1261) between ground and harness side of left front side crash sensor connector. See WIRING DIAGRAMS  . Measure voltage in Brown/Light Green wire (circuit No. 1262) between ground and harness side of left front side crash sensor connector. If voltage is less than 0.2 volt in both circuits, go to step  11 . If voltage is more than 0.2 volt in either circuit, repair short to battery in appropriate wire. Go to step  54 .

  7. Check left front side crash sensor circuits for short to ground between RCM & sensor

    Turn ignition switch to OFF position. Access left front side crash sensor and disconnect harness connector. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in White/Light Green wire (circuit No. 1261) between ground and harness side of left front side crash sensor connector. See WIRING DIAGRAMS  . Measure resistance in Brown/Light Green wire (circuit No. 1262) between ground and harness side of left front side crash sensor connector. If resistance is more than 10 k/ohms in both circuits, go to step  11 . If resistance is less than 10 k/ohms in either circuit, repair short to ground in appropriate wire. See WIRING DIAGRAMS  . Go to step  54 .

  8. Check left front side crash sensor circuit for open between RCM & sensor

    Turn ignition switch to OFF position. Access left front side crash sensor and disconnect harness connector. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in White/Light Green wire (circuit No. 1261) between harness side of RCM connector C301B, terminal No. 27 and harness side of left front side crash sensor harness connector. See Figure . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in White/Light Green wire. See WIRING DIAGRAMS  . Go to step  54 .

  9. Check left front side crash sensor circuit for open between RCM & sensor

    Measure resistance in Brown/Light Green wire (circuit No. 1262) between harness side of RCM connector C301B, terminal No. 28 and harness side of left front side crash sensor harness connector. If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Brown/Light Green wire. Go to step  54 .

  10. Check for short between left front side crash sensor circuits

    Measure resistance between White/Light Green wire and Brown/Light Green wire on harness side of left front side crash sensor connector. If resistance is more than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short between White/Light Green and Brown/Light Green wires. Go to step  54 .

  11. Check left front side crash sensor

    Ensure ignition switch is in OFF position. Connect connectors C310A and C310B. Install a known-good left front side crash sensor. Connect negative battery cable. Turn ignition switch to ON position. Perform on-demand self-test. Retrieve and record any flagged faults. If any faults were flagged against left front side crash sensor, install original left front side crash sensor. Go to step  52 . If no faults were flagged against left front side crash sensor, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  12. Check right front side crash sensor mounting

    Turn ignition switch to OFF position. Access right front side crash sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Ensure mounting bolt are fully seated and tightened correctly, and harness connector is properly connected. See TORQUE SPECIFICATIONS  . Remove right front side crash sensor. Visually inspect sensor mounting bracket for damage, corrosion or dirt. If any problems were found, clean, tighten or repair mounting surface as necessary. Reinstall sensor and go to step  54 . If no problems were found, go to next step.

  13. Repeat on-demand self-test

    Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install right front side crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  14. Check right front side crash sensor ground circuit for high resistance

    Turn ignition switch to OFF position. Disconnect right front side crash sensor harness connector. Measure resistance in Brown wire (circuit No. 1264) between right front side crash sensor case ground and harness side of right front side crash sensor connector. If resistance is less than 100 ohms, go to step  17 . If resistance is more than 100 ohms, go to step  21 .

  15. Clean right front side crash sensor mounting & repeat on-demand self-test

    Remove right front side crash sensor. Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install right front side crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  16. Check right front side crash sensor circuits for short to battery between RCM & sensor

    Turn ignition switch to OFF position. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Access right front side crash sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Turn ignition switch to ON position. Measure voltage in White wire (circuit No. 1263) between ground and harness side of right front side crash sensor connector. See WIRING DIAGRAMS  . Measure voltage in Brown wire (circuit No. 1264) between ground and harness side of right front side crash sensor connector. If voltage is less than 0.2 volt in both circuits, go to next step. If voltage is more than 0.2 volt in either circuit, repair short to battery in appropriate wire. Go to step  54 .

  17. Check right front side crash sensor circuits for short to ground between RCM & sensor

    Turn ignition switch to OFF position. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Access right front side crash sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Measure resistance in White wire (circuit No. 1263) between ground and harness side of right front side crash sensor connector. See WIRING DIAGRAMS  . Measure resistance in Brown wire (circuit No. 1264) between ground and harness side of right front side crash sensor connector. If resistance is more than 10 k/ohms in both circuits, go to step  21 . If resistance is less than 10 k/ohms in either circuit, repair short to ground in appropriate wire. Go to step  54 .

  18. Check right front side crash sensor circuit for open between RCM & sensor

    Turn ignition switch to OFF position. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Access right front side crash sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Measure resistance in White wire between harness side of RCM connector C301B, terminal No. 29 and harness side of right front side crash sensor harness connector. See Figure . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in White wire. See WIRING DIAGRAMS  . Go to step  54 .

  19. Check right front side crash sensor circuit for open between RCM & sensor

    Measure resistance in Brown wire between harness side of RCM connector C301B, terminal No. 30 and harness side of right front side crash sensor harness connector. If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Brown wire. Go to step  54 .

  20. Check for short between right front side crash sensor circuits

    Measure resistance between White and Brown wires on harness side of right front side crash sensor connector. If resistance is more than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short between White and Brown wires. Go to step  54 .

  21. Check right front side crash sensor

    Ensure ignition switch is in OFF position. Connect connectors C310A and C310B. Install a known-good right front side crash sensor. Connect negative battery cable. Turn ignition switch to ON position. Perform on-demand self-test. Retrieve and record any flagged faults. If any faults were flagged against right front side crash sensor, install original right front side crash sensor and go to step  52 . If no faults were flagged against right front side crash sensor, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  22. Check left rear side crash sensor mounting

    Turn ignition switch to OFF position. Access left rear side crash sensor. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Ensure mounting bolts are fully seated and tightened correctly, and harness connector is properly connected. See TORQUE SPECIFICATIONS  . Remove left rear side crash sensor. Visually inspect sensor mounting bracket for damage, corrosion or dirt. If any problems were found, clean tighten or repair mounting surface as necessary. Reinstall sensor and go to step  54 . If no problems were found, go to next step.

  23. Repeat on-demand self-test

    Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install left rear side crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  24. Check left rear side crash sensor ground circuit for high resistance

    Turn ignition switch to OFF position. Disconnect left rear side crash sensor harness connector. Measure resistance in Dark Green/White wire (circuit No. 1642) between left rear side crash sensor case ground and harness side of left rear side crash sensor connector. See WIRING DIAGRAMS  . If resistance is less than 100 ohms, go to step  27 . If resistance is more than 100 ohms, go to next step.

  25. Clean left rear side crash sensor mounting & repeat on-demand self-test

    Remove left rear side crash sensor. Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install left rear side crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  26. Check left rear side crash sensor circuits for short to battery between RCM & sensor

    Turn ignition switch to OFF position. Access left rear side crash sensor and disconnect harness connector. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Turn ignition switch to ON position. Measure voltage in Dark Green/White wire (circuit No. 1642) between ground and harness side of left rear side crash sensor connector. See WIRING DIAGRAMS  . Measure voltage in Violet wire (circuit No. 1641) between ground and harness side of left rear side crash sensor connector. If voltage is less than 0.2 volt in both circuits, go to step  31 . If voltage is more than 0.2 volt in either circuit, repair short to battery in appropriate wire. Go to step  54 .

  27. Check left rear side crash sensor circuits for short to ground between RCM & sensor

    Turn ignition switch to OFF position. Access left rear side crash sensor and disconnect harness connector. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in Dark Green/White wire (circuit No. 1641) between ground and harness side of left rear side crash sensor connector. See WIRING DIAGRAMS  . Measure resistance in Violet wire (circuit No. 1641) between ground and harness side of left rear side crash sensor connector. If resistance is more than 10 k/ohms in both circuits, go to step  31 . If resistance is less than 10 k/ohms in either circuit, repair short to ground in appropriate wire. Go to step  54 .

  28. Check left rear side crash sensor circuit for open between RCM & sensor

    Turn ignition switch to OFF position. Access left rear side crash sensor and disconnect harness connector. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in Violet wire (circuit No. 1641) wire between harness side of RCM connector C301B, terminal No. 13 and harness side of left rear side crash sensor harness connector. See Figure . See WIRING DIAGRAMS  . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Violet wire. Go to step  54 .

  29. Check left rear side crash sensor circuit for open between RCM & sensor

    Measure resistance in Dark Green/White wire (circuit No. 1642) between harness side of RCM connector C301B, terminal No. 14 and harness side of left rear side crash sensor harness connector. If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Dark Green/White wire. Go to step  54 .

  30. Check for short between left rear side crash sensor circuits

    Measure resistance between Violet wire and Dark Green/White wire wire on harness side of left rear side crash sensor connector. If resistance is more than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short between White/Light Green and Dark Green/White wires. Go to step  54 .

  31. Check left rear side crash sensor

    Ensure ignition switch is in OFF position. Connect connectors C310A and C310B. Install a known-good left rear side crash sensor. Turn ignition switch to ON position. Perform on-demand self-test. Retrieve and record any flagged faults. If any faults were flagged against left rear side crash sensor, install original left rear side crash sensor and go to step  52 . If no faults were flagged against left rear side crash sensor, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  32. Check right rear side crash sensor mounting

    Turn ignition switch to OFF position. Access right rear side crash sensor. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Ensure mounting bolts are fully seated and tightened correctly, and harness connector is properly connected. See TORQUE SPECIFICATIONS  . Remove right rear side crash sensor. Visually inspect sensor mounting bracket for damage, corrosion or dirt. If any problems were found, clean tighten or repair mounting surface as necessary. Reinstall sensor and go to step  54 . If no problems were found, go to next step.

  33. Repeat on-demand self-test

    Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install right rear side crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  34. Check right rear side crash sensor ground circuit for high resistance

    Turn ignition switch to OFF position. Disconnect right rear side crash sensor harness connector. Measure resistance in Light Blue/White (circuit No. 1644) between right rear side crash sensor case ground and harness side of right rear side crash sensor connector. If resistance is less than 100 ohms, go to step  37 . If resistance is more than 100 ohms, go to next step.

  35. Clean right rear side crash sensor mounting & repeat on-demand self-test

    Remove right rear side crash sensor. Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install right rear side crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  36. Check right rear side crash sensor circuits for short to battery between RCM & sensor

    Turn ignition switch to OFF position. Access right rear side crash sensor. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Turn ignition switch to ON position. Measure voltage in White/Red wire (circuit No. 1643) between ground and harness side of right rear side crash sensor connector. See WIRING DIAGRAMS  . Measure voltage in Light Blue/White wire (circuit No. 1644) between ground and harness side of right rear side crash sensor connector. If voltage is less than 0.2 volt in both circuits, go to step  41 . If voltage is more than 0.2 volt in either circuit, repair short to battery in appropriate wire. Go to step  54 .

  37. Check right rear side crash sensor circuits for short to ground between RCM & sensor

    Turn ignition switch to OFF position. Access right rear side crash sensor. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in White/Red wire (circuit No. 1643) between ground and harness side of right rear side crash sensor connector. See WIRING DIAGRAMS  . Measure resistance in Light Blue/White wire (circuit No. 1644) between ground and harness side of right rear side crash sensor connector. If resistance is more than 10 k/ohms in both circuits, go to step  41 . If resistance is less than 10 k/ohms in either circuit, repair short to ground in appropriate wire. Go to step  54 .

  38. Check right rear side crash sensor circuit for open between RCM & sensor

    Turn ignition switch to OFF position. Access right rear side crash sensor. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in White/Red wire (circuit No. 1643) between harness side of RCM connector C301B, terminal No. 15 and harness side of right rear side crash sensor harness connector. See Figure . See WIRING DIAGRAMS  . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in White/Red wire. Go to step  54 .

  39. Check right rear side crash sensor circuit for open between RCM & sensor

    Measure resistance in Light Blue/White wire between harness side of RCM connector C301B, terminal No. 16 and harness side of right rear side crash sensor harness connector. If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Light Blue/White wire. Go to step  54 .

  40. Check for short between right rear side crash sensor circuits

    Measure resistance between White/Red wire and Light Blue/White wire on harness side of right rear side crash sensor connector. If resistance is more than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short between White and Light Blue/White wires. Go to step  54 .

  41. Check right rear side crash sensor

    Ensure ignition switch is in OFF position. Connect connectors C310A and C310B. Install a known-good right rear side crash sensor. Connect negative battery cable. Turn ignition switch to ON position. Perform on-demand self-test. Retrieve and record any flagged faults. If any faults were flagged against right rear side crash sensor, install original right rear side crash sensor and go to next step. If no faults were flagged against right rear side crash sensor, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  42. Check front crash sensor mounting

    Turn ignition switch to OFF position. Access front crash sensor. See FRONT CRASH SENSOR  under REMOVAL & INSTALLATION. Ensure mounting bolts are fully seated and tightened correctly, and harness connector is properly connected. See TORQUE SPECIFICATIONS  . Remove front crash sensor. Visually inspect sensor mounting bracket for damage, corrosion or dirt. If any problems were found, clean tighten or repair mounting surface as necessary. Reinstall sensor and go to step  54 . If no problems were found, go to next step.

  43. Repeat on-demand self-test

    Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install front crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  44. Check front crash sensor ground circuit for high resistance

    Turn ignition switch to OFF position. Disconnect front crash sensor harness connector. Measure resistance in Pink/Light Green wire (circuit No. 618) between front crash sensor case ground and harness side of front crash sensor connector. If resistance is less than 100 ohms, go to step  51 . If resistance is more than 100 ohms, go to next step.

  45. Clean front crash sensor mounting & repeat on-demand self-test

    Remove front crash sensor. Clean and repair mounting surface as necessary. Clean sensor mounting bolts. Install front crash sensor. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, go to next step. If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  46. Check front crash sensor circuits for short to battery between RCM & sensor

    Turn ignition switch to OFF position. Access front crash sensor. See FRONT CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Turn ignition switch to ON position. Measure voltage in Pink/Orange wire (circuit No. 617) between ground and harness side of front crash sensor connector. See WIRING DIAGRAMS  . Measure voltage in Pink/Light Green wire (circuit No. 618) between ground and harness side of front crash sensor connector. If voltage is less than 0.2 volt in both circuits, go to step  51 . If voltage is more than 0.2 volt in either circuit, repair short to battery in appropriate wire. Go to step  54 .

  47. Check front crash sensor circuits for short to ground between RCM & sensor

    Turn ignition switch to OFF position. Access front crash sensor. See FRONT CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in Pink/Orange wire (circuit No. 617) between ground and harness side of front crash sensor connector. See WIRING DIAGRAMS  . Measure resistance in Pink/Light Green wire (circuit No. 618) between ground and harness side of front crash sensor connector. If resistance is more than 10 k/ohms in both circuits, go to next step. If resistance is less than 10 k/ohms in either circuit, repair short to ground in appropriate wire. Go to step  54 .

  48. Check front crash sensor circuit for open between RCM & sensor

    Turn ignition switch to OFF position. Access front crash sensor. See FRONT CRASH SENSOR  under REMOVAL & INSTALLATION. Access RCM and disconnect connectors C310A and C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance in Pink/Orange wire between harness side of RCM connector C301B, terminal No. 19 and harness side of front crash sensor harness connector. See Figure . See WIRING DIAGRAMS  . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Pink/Orange wire. Go to step  54 .

  49. Check front crash sensor circuit for open between RCM & sensor

    Measure resistance in Pink/Light Green wire between harness side of RCM connector C301B, terminal No. 20 and harness side of front crash sensor harness connector. If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Pink/Light Green wire. Go to step  54 .

  50. Check for short between front crash sensor circuits

    Measure resistance between Pink/Orange wire and Pink/Light Green wire on harness side of front crash sensor connector. If resistance is more than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short between Pink/Orange and Pink/Light Green wires. Go to step  54 .

  51. Check front crash sensor

    Ensure ignition switch is in OFF position. Connect connectors C310A and C310B. Install a known-good right rear side crash sensor. Connect negative battery cable. Turn ignition switch to ON position. Perform on-demand self-test. Retrieve and record any flagged faults. If any faults were flagged against front crash sensor, install original front crash sensor and go to next step. If no faults were flagged against front crash sensor, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .
    NOTE: Ensure all air bag system simulators, sensor electrical connectors and RCM electrical connectors are connected prior to carrying out on-demand self-test or erroneous faults may be set.

  52. Confirm RCM fault

    Turn ignition switch to OFF position. Reconnect all impact sensor and RCM connectors. Perform on-demand self-test. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test and "?" was flagged by scan tool, carry out entire test. Replace RCM. Go to step  54 . If DTC B2296 was not retrieved during on-demand self-test, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Activate other systems in same wire harness. Repair any intermittent problems found. Go to step  54 .

  53. Check for intermittent fault

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Perform on-demand self-test. Flag DTC B2296. Retrieve and record any flagged faults. If DTC B2296 was retrieved during on-demand self-test, check of causes of intermittent fault at or near affected air bag harness connector. If intermittent fault at or near affected air bag connector was found and corrected, go to next step. If intermittent fault at or near affected air bag connector was not found and corrected, use flagged DTCs to find appropriate step.
    • For left front side crash sensor (F-D-SEN) with mounting (COMM) fault, go to step  2 .
    • For left front side crash sensor (F-D-SEN) with internal (INT) fault, replace left front side curtain air bag sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Go to step  54 .
    • For left front side crash sensor (FD-SEN2) with short to battery (-B-) fault, go to step  6 .
    • For left front side crash sensor (FD-SEN2) with short to ground (--G) fault, go to step  7 .
    • For left front side crash sensor (F-DSEN2) with communications (COM) fault, go to step  8 .
    • For right front side crash sensor (F-P-SEN) with mounting (COMM) fault, go to step  12 .
    • For right front side crash sensor (FP-SEN2) with internal (INT) fault, replace right front side curtain air bag sensor. Go to step  54 .
    • For right front side crash sensor (F-P-SEN) with short to battery (-B-) fault, go to step  16 .
    • For right front side crash sensor (FP-SEN2) with short to ground (--G) fault, go to step  17 .
    • For right front side crash sensor (FP-SEN2) with communications (COM) fault, go to step  18 .
    • For left rear side crash sensor (D-2-SEN) with mounting (COMM) fault, go to step  22 .
    • For left rear side crash sensor (D-2-SEN) with internal (INT) fault, replace left rear side curtain air bag sensor. See REAR SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Go to step  54 .
    • For left rear side crash sensor (D2--SEN2) with short to battery (-B-) fault, go to step  26 .
    • For left rear side crash sensor (D2--SEN2) with short to ground (--G) fault, go to step  27 .
    • For left rear side crash sensor (D2-SEN2) with communications (COM) fault, go to step  28 .
    • For right rear side crash sensor (P-2-SEN) with mounting (COMM) fault, go to step  32 .
    • For right rear side crash sensor (P-2-SEN) with internal (INT) fault, replace right rear side curtain air bag sensor. Go to step  54 .
    • For right rear side crash sensor (P2--SEN2) with short to battery (-B-) fault, go to step  36 .
    • For right rear side crash sensor (P2--SEN2) with short to ground (--G) fault, go to step  37 .
    • For right rear side crash sensor (P-2-SEN) with communications (COM) fault, go to step  38 .
    • For front crash sensor (FNT-SEN) with mounting (COMM) fault, Go to step  42 .
    • For front crash sensor (FNT-SEN) with internal (INT) fault, replace front crash sensor. See FRONT SIDE CRASH SENSOR  under REMOVAL & INSTALLATION. Go to step  54 .
    • For front crash sensor (F-SEN) with short to battery (-B-) fault, go to step  46 .
    • For front crash sensor (F-SEN) with short to ground (--G) fault, go to step  47 .
    • For front crash sensor (F-SEN) with communications (COM) fault, Go to step  48 .

    If DTC B2296 was not retrieved during on-demand self-test, check for cause of intermittent fault. Attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Repair any intermittent problems found. Go to next step.

  54. Check for additional DTCs

    Refer to continuous DTCs recorded in step  1 . If any continuous DTCs were retrieved, go to diagnostic trouble code identification table for direction to appropriate test. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. DO NOT clear any DTCs until all DTCs have been resolved. If no DTCs were retrieved, reconnect air bag system. Activate air bag system. See ACTIVATING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Clear all DTCs. See CLEARING FAULT CODES  under DIAGNOSTICS.
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