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Test Procedure

  1. QA1 CARRY OUT A VEHICLE INSPECTION AND VERIFY THE SELF-TEST PROCEDURE 
    NOTE: For DTC U0284, GO to  QA15.
    NOTE: If the self-test or communication concern occurred after a failed or an aborted reprogram, the module may be blank. Attempt to reprogram the module again before continuing with this pinpoint test.
    • Visually inspect the following for obvious signs of electrical damage:
      • harness wiring
      • electrical connections
    • Verify the correct procedure was used to activate the self-test for the scan tool. Refer to SCAN TOOL SETUP AND FUNCTIONALITY .

    Was the correct self-test procedure used? 

    Yes No
    GO to  QA2. REFER to SCAN TOOL SETUP AND FUNCTIONALITY .
  2. QA2 CARRY OUT THE NETWORK TEST 
    NOTE: When using Integrated Diagnostic System (IDS), the scan tool attempts to communicate with the PCM first. After establishing communication with the PCM, the scan tool then attempts to communicate with all modules on the vehicle. If an IDS session cannot be established, IDS may state no communication can be established with the PCM:
    • choose No when the scan tool prompts whether or not to retry communication.
    • enter a PCM part number, tear tag or calibration number to identify the vehicle and start a session. The PCM part number and 4-character tear tag are located on the PCM.
    • Ignition ON, engine OFF.
    • Carry out the network test.

    Do all modules indicate pass? 

    Yes No
    For DTCs U0101, U0402 or U1013, GO to  QA7.
    For DTC U0104, GO to  QA12.
    For DTCs U0121, U0415 or U1039, GO to  QA8.
    For DTC U0138, GO to  QA13.
    For DTCs U0140 or U0422, GO to  QA9.
    For DTCs U0155 or U0423, GO to  QA10.
    For DTC U0212, GO to  QA11.
    For all others, REFER to Symptom Charts, GO to PINPOINT TEST QT .    		 If only PCM indicates fail, GO to  QA3.
    For network test or all other modules indicates fail, REFER to the appropriate Module Communications Network article, to diagnose the PCM does not respond to the scan tool or no high speed controller area network (CAN) communication, all modules are not responding symptom.
  3. QA3 CHECK FOR VREF VOLTAGE AT THE ETBTPS SENSOR 
    • Ignition ON, engine OFF.
    • ETBTPS connector disconnected.
    • Measure the voltage between:
      (+) ETBTPS Connector, Harness Side (-) ETBTPS Connector, Harness Side
      ETCREF ETCRTN

    Is the voltage between 4.5 - 5.5 V? 

    Yes No
    REFER to the appropriate Module Communications Network article, to diagnose the PCM does not respond to the scan tool or no high speed controller area network (CAN) communication, all modules are not responding symptom. GO to  QA4.
  4. QA4 CHECK THE ISP-R VOLTAGE AT THE PCM HARNESS CONNECTOR 
    • Ignition OFF.
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) PCM Connector, Harness Side (-)
      ISP-R Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to  QA5. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  5. QA5 CHECK THE PCM VPWR CIRCUITS FOR VOLTAGE 
    • Ignition OFF.
    • Disconnect the PCM.
    • Connect a 5 amp fused jumper wire between the following:
      Point A PCM Connector, Harness Side Point B
      PCMRC Ground
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) PCM Connector, Harness Side (-)
      VPWR Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to  QA6. GO to PINPOINT TEST B .
  6. QA6 CHECK THE PCM GROUND CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between:
      (+) PCM Connector, Harness Side (-)
      PWRGND Ground

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  QA16. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  7. QA7 CHECK FOR A TRANSMISSION CONTROL MODULE (TCM) CONCERN 
    • Check for any TCM DTCs.
    • Check for other TCM related symptoms.

    Is a concern present? 

    Yes No
    REFER to the appropriate Automatic Transaxle/Transmission article, DTC Charts to continue diagnosis. For DTC U1013, GO to  QA14.
    For all others, GO to  QA16.
  8. QA8 CHECK FOR AN ANTI-LOCK BRAKE SYSTEM (ABS) MODULE CONCERN 
    • Check for any ABS module DTCs.
    • Check for other ABS related symptoms.

    Is a concern present? 

    Yes No
    REFER to the appropriate Vehicle Dynamic Systems article, DTC Charts to continue diagnosis. GO to  QA16.
  9. QA9 CHECK FOR A BODY CONTROL MODULE (BCM) CONCERN 
    • Check for any BCM DTCs.
    • Check for other BCM related symptoms.

    Is a concern present? 

    Yes No
    REFER to the appropriate Multifunction Electronic Modules article, DTC Charts to continue diagnosis. GO to  QA16.
  10. QA10 CHECK FOR AN INSTRUMENT PANEL CLUSTER (IPC) CONCERN 
    • Check for any IPC DTCs.
    • Check for other IPC related symptoms.

    Is a concern present? 

    Yes No
    REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article, DTC Charts to continue diagnosis. GO to  QA16.
  11. QA11 CHECK FOR A CRUISE CONTROL CONCERN 
    • Check for any other PCM DTCs.
    • Check for other PCM related symptoms.

    Is a concern present? 

    Yes No
    Refer to the appropriate Cruise Control article to continue diagnosis of the cruise control system. GO to  QA16.
  12. QA12 CHECK FOR A STEERING ANGLE SENSOR MODULE (SASM) CONCERN 
    • Check for any SASM DTCs.
    • Check for other SASM related symptoms.

    Is a concern present? 

    Yes No
    REFER to the appropriate Vehicle Dynamic Systems article to continue diagnosis of the SASM system. GO to  QA16.
  13. QA13 CHECK FOR AN ALL TERRAIN CONTROL MODULE (ATCM) CONCERN 
    • Check for any ATCM DTCs.
    • Check for other ATCM related symptoms.

    Is a concern present? 

    Yes No
    REFER to the appropriate Four Wheel Drive 4WD Systems article to continue diagnosis of the ATCM system. GO to  QA16.
  14. QA14 CHECK FOR A POWERTRAIN CONTROL MODULE (PCM) CONCERN 
    • Check for any other PCM DTCs.

    Is a concern present? 

    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC.
    GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .    		 For DTC U1013, GO to  QA15.
    For all others, REFER to the appropriate Front End Body Panels article, to continue diagnosis of the grille shutter assembly.
  15. QA15 REFLASH THE PCM 

    Is the concern still present? 

    Yes No
    REPROGRAM or UPDATE the TCM Calibration. REFER to the appropriate Module Configuration article.
    CLEAR the DTCs. REPEAT the self-test.    		 The system is operating correctly at this time.
  16. QA16 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the network test and verify the concern is still present.
    • Carry out the PCM self-test.
    • Verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block for a Replacement PCM. The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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