INSPECTION PROCEDURE 1: Speedometer does not work.: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: Vehicles Communication Interface (V.C.I.)
  • MB991827: MUT-III USB Cable
  • MB991911: MUT-III Main Harness B (Vehicles without CAN communication system)

1. STEP 1. Check the speedometer. 

   Use scan tool MB991958 to enter simulated vehicle speed.

   1. Connect scan tool MB991958 to the data link connector.
      Fig 1: Connecting Scan Tool MB991958 To Data Link Connector

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   2. Turn the ignition switch to "ON" position.
   3. Select "Interactive Diagnosis" from the start-up screen.
   4. Select "System Select."
   5. Choose "Meter" from the "BODY" tab.
   6. Select "Simulated vehicle Speed Output."

   OK: The speedometer shows that simulated vehicle speed. 

   Q: Is the check result satisfactory? 

   1. YES:  Go to Step 2.
   2. NO:  Go to  Step 4.
2. STEP 2. Check the vehicle speed sensor. 
   1. Turn the ignition switch to "ON" position.
   2. Read the MFI system diagnostic trouble code.
      Fig 2: Reading MFI System Diagnostic Trouble Code

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   Q: Is MFI system DTC P0500 set? 

   1. YES: 
      • For M/T, Go to  Step 13.
      • For A/T, Go to  Step 22.
   2. NO:  Go to Step 3.
3. STEP 3. Check the odometer and trip odometer operation. 

   Q: Do the odometer and trip odometer work correctly? 

   1. YES:  Go to  Step 10.
   2. NO:  Go to Step 4.
4. STEP 4. Check the combination meter power supply circuit at the combination meter connector C-41. 
   1. Disconnect the combination meter connector C-41.
      Fig 3: Disconnecting Combination Meter Connector C-41

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   2. Turn the ignition switch to "ON" position.
   3. Measure the voltage between terminal 52 and ground.
      • The measured value should be 12 volts (battery positive voltage).
      Fig 4: Measuring Voltage Between Terminal 52 And Ground
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   Q: Does the measured voltage correspond with this range? 

   1. YES:  Go to  Step 7.
   2. NO:  Go to Step 5.
5. STEP 5. Check the combination meter connector C-41 for damage. 
   Fig 5: Checking Combination Meter Connector C-41

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   Q: Is combination meter connector C-41 in good condition? 

   1. YES:  Go to Step 6.
   2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
6. STEP 6. Check the wiring harness between combination meter connector C-41 (terminal 52) and ignition switch (IG1). 
   Fig 6: Checking Wiring Harness Between Combination Meter Connector C-41 And Ignition Switch

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   NOTE: After checking junction block connectors C-111 and C-108, check the wires. If junction block connectors C-111 and C-108 are damaged, repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION .
   Fig 7: Checking Junction Block Connectors C-111 And C-108

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   Q: Is the wiring harness between combination meter connector C-41 (terminal 52) and ignition switch (IG1) in good condition? 

   1. YES:  There is no action to be taken.
   2. NO:  Repair the wiring harness. The speedometer should work normally.
7. STEP 7. Check the combination meter (speedometer) ground circuit at the combination meter connector C-42. 
   1. Disconnect the combination meter connector C-42.
   2. Measure the resistance between terminal 34 and ground.
      • The measured value should be 2 ohm or less.
      Fig 8: Measuring Resistance Between Terminal 34 And Ground
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   Q: Does the measured resistance value correspond with this range? 

   1. YES:  Repair or replace the combination meter (printed-circuit board or speedometer and tachometer). The speedometer should work normally.
   2. NO:  Go to Step 8.
8. STEP 8. Check the combination meter connector C-42 for damage. 
   Fig 9: Checking Combination Meter Connector C-42

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   Q: Is combination meter connector C-42 in good condition? 

   1. YES:  Go to Step 9.
   2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
9. STEP 9. Check the wiring harness between combination meter connector C-42 (terminal 34) and ground. 
   Fig 10: Checking Wiring Harness Between Combination Meter Connector C-42 And Ground

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   Q: Is the wiring harness between combination meter connector C-42 (terminal 34) and ground in good condition? 

   1. YES:  There is no action to be taken.
   2. NO:  Repair the wiring harness. The speedometer should work normally.
10. STEP 10. Check the combination meter vehicle speed sensor input signal circuit at the combination meter connector C-42. 
    1. Disconnect the vehicle speed sensor connector B-39 < MT>.
       Fig 11: Identifying Vehicle Speed Sensor Connector B-39 - 2.4L Engine

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       Fig 12: Identifying Vehicle Speed Sensor Connector B-39 - 3.0L Engine Without Variable Induction System

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       Fig 13: Identifying Vehicle Speed Sensor Connector B-39 - 3.0L Engine Variable Induction System

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    2. Disconnect the combination meter connector C-42.
       Fig 14: Identifying Combination Meter Connector C-42

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    3. Turn the ignition switch to "ON" position.
    4. Measure the voltage between terminal 30 and ground.
       • The measured value should be between approximately 7 and 8 volts
       Fig 15: Measuring Voltage Between Terminal 30 And Ground
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    Q: Does the measured voltage correspond with this range? 

    1. YES:  Repair or replace the combination meter (printed-circuit board or speedometer and tachometer). The speedometer should work normally.
    2. NO:  Go to Step 11.
11. STEP 11. Check the combination meter connector C-42 and vehicle speed sensor connector B-39 (terminal 3) < M/T > for damage. 
    Fig 16: Checking Combination Meter Connector C-42 And Vehicle Speed Sensor Connector B-39

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    Fig 17: Checking Combination Meter Connector C-42 And Vehicle Speed Sensor Connector B-39 - 2.4L Engine

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    Fig 18: Checking Combination Meter Connector C-42 And Vehicle Speed Sensor Connector B-39 - 3.0L Engine Without Variable Induction System

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    Fig 19: Checking Combination Meter Connector C-42 And Vehicle Speed Sensor Connector B-39 -3.0L Engine Variable Induction System

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    Q: Are combination meter connector C-42 and vehicle speed sensor connector B-39 (terminal 3) < M/T > in good condition? 

    1. YES: 
       • For M/T go to Step 12.
       • For A/T go to  Step 22.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
12. STEP 12. Check the wiring harness between combination meter connector C-42 (terminal 30) and vehicle speed sensor connector B-39 (terminal 3) < M/T >. 
    Fig 20: Checking Wiring Harness Between Combination Meter Connector C-42 And Vehicle Speed Sensor Connector B-39

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    Fig 21: Identifying Vehicle Speed Sensor Connector B-39 - 2.4L Engine

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    Fig 22: Identifying Vehicle Speed Sensor Connector B-39 - 3.0L Engine Without Variable Induction System

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    Fig 23: Identifying Vehicle Speed Sensor Connector B-39 - 3.0L Engine Variable Induction System

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    NOTE: After checking intermediate connector B-36 < M/T >, C-28, and joint connector C-77, check the wires. If intermediate connector C-28 and joint connector C-77 are damaged, repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION .
    Fig 24: Checking Wiring Harness Between Combination Meter Connector C-42 And Vehicle Speed Sensor Connector B-39

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    Fig 25: Identifying C-28 Connector Terminals

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    Q: Are the wiring harness between combination meter connector C-42 (terminal 30) and vehicle speed sensor connector B-39 (terminal 3) < M/T > in good condition? 

    1. YES:  There is no action to be taken.
    2. NO:  Repair the wiring harness. The speedometer should work normally.
13. STEP 13. Check the vehicle speed sensor power supply circuit at the vehicle speed meter connector B-39 < M/T >. 
    1. Disconnect the vehicle speed sensor connector B-39 < M/T >.
    2. Turn the ignition switch to "ON" position.
    3. Measure the voltage between terminal 1 and ground.
       • The measured value should be 12 volts (battery positive voltage).
       Fig 26: Measuring Voltage Between Terminal 1 And Ground

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    Q: Does the measured voltage correspond with this range? 

    1. YES:  Go to  Step 16.
    2. NO:  Go to Step 14.
14. STEP 14. Check the vehicle speed sensor connector B-39 < M/T > damage. 
    Fig 27: Identifying B-39 Connector Terminals

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    Fig 28: Identifying B-39 Connector Location

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    Fig 29: Identifying B-39 Connector

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    Q: Is vehicle speed sensor connector B-39 < M/T > in good condition? 

    1. YES:  Go to Step 15.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
15. STEP 15. Check the wiring harness between vehicle speed sensor connector B-39 (terminal 1) < M/T > and ignition switch (IG1). 
    Fig 30: Identifying B-39 And B-36 Connectors Location

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    Fig 31: Identifying B-39 And B-36 Connectors

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    Fig 32: Identifying B-39 And B-36 Connector Terminals

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    NOTE: After checking junction block connectors C-111 and C-112, joint connector C-78 and intermediate connector B-36 < M/T >, C-28, check the wires. If junction block connectors C-111 and C-112, joint connector C-78 and intermediate connector B-36 < M/T >, C-28 are damaged, repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION .
    Fig 33: Identifying C-28 Connector Terminals

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    Fig 34: Identifying C-78 Connector Terminals

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    Fig 35: Identifying C-111 And C-112 Connectors Terminals

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    Q: Are the wiring harness between vehicle speed sensor connector C-39 (terminal 1) < M/T > and ignition switch (IG1) in good condition? 

    1. YES:  There is no action to be taken.
    2. NO:  Repair the wiring harness. The speedometer should work normally.
16. STEP 16. Check the vehicle speed sensor ground circuit at the vehicle speed sensor connector B-39 < M/T >. 
    1. Disconnect the vehicle speed sensor connector B-39 < M/T >.
    2. Measure the resistance between terminal 2 and ground.
       • The measured value should be 2 ohm or less.
       Fig 36: Measuring Resistance Between Terminal 2 And Ground
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    Q: Does measured resistance value correspond with this range? 

    1. YES:  Go to  Step 19
    2. NO:  Go to Step 17.
17. STEP 17. Check the vehicle speed sensor connector B-39 < M/T > for damage. 
    Fig 37: Identifying B-39 Connector Terminals

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    Fig 38: Identifying B-39 Connector Location

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    Fig 39: Identifying B-39 Connector

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    Q: Is vehicle speed connector B-39 < M/T > in good condition? 

    1. YES:  Go to Step 18.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
18. STEP 18. Check the wiring harness between vehicle speed sensor connector B-39 (terminal 2) < M/T > and ground. 
    Fig 40: Identifying B-39 And B-36 Connectors Terminals

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    Fig 41: Identifying B-39 And B-36 Connectors Location

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    Fig 42: Identifying B-39 And B-36 Connectors

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    NOTE: After checking intermediate connector B-36 < M/T >, check the wires. If intermediate connector B-36 < M/T > is damaged, repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between vehicle speed sensor connector B-39 (terminal 2) < M/T > and ground in good condition? 

    1. YES:  There is no action to be taken.
    2. NO:  Repair the wiring harness. The speedometer should work normally.
19. STEP 19. Check the vehicle speed sensor signal circuit at the vehicle speed sensor connector B-39. 
    1. Remove the battery and the battery case.
    2. Disconnect the vehicle speed sensor connector B-39.
    3. Withdraw the wiring harness side of the vehicle speed sensor connector B-39.
    4. Install the battery and the battery case.
    5. Turn the ignition switch to "ON"
    6. Measure the voltage between terminal 3 and ground.
       • The measured value should be 9 volts or more.
         Fig 43: Measuring Voltage Between Terminal 3 And Ground

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    Q: Does the measured voltage correspond with this range? 

    1. YES:  Replace the vehicle speed sensor. The speedometer should work normally.
    2. NO:  Go to Step 20.
20. STEP 20. Check the vehicle speed sensor connector B-39 < M/T >, auto-cruise control-ECU connector C-20, ECM < M/T > connector C-60 <2.4L-M/T>, C-62 <3.0L-M/T> and combination meter connector C-42. 
    Fig 44: Identifying B-39 Connector Location

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    Fig 45: Identifying B-39 Connector

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    Fig 46: Identifying C-20 Connector Location

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    Fig 47: Identifying C-42 Connector Location

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    Fig 48: Identifying C-62 Connector

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    Q: Are vehicle speed sensor connector B-39, auto-cruise control-ECU connector C-20 ECM < M/T > connector C-60 <2.4L-M/T>, C-62 <3.0L-M/T> and combination meter connector C-42 in good condition? 

    1. YES:  Go to Step 21.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
21. STEP 21. Check the wiring harness from vehicle speed sensor connector B-39 (terminal 3) < M/T > to auto-cruise control-ECU connector C-20 (terminal 10), ECM < M/T > connector C-60 (terminal 86) <2.4L-M/T>, C-62 (terminal 80) <3.0L-M/T> and combination meter connector C-42 (terminal 30). 
    Fig 49: Checking B-36 And B-39 Connectors Terminals

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    Fig 50: Identifying B-36 And B-39 Connectors Location

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    Fig 51: Identifying C-20 Connector Location

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    Fig 52: Identifying C-42 Connector Location

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    Fig 53: Identifying C-60 And C-62 Connectors

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    NOTE: After checking joint connector C-77 and intermediate connector C-28, check the wires. If joint connector C-77 and intermediate connector C-28 are damaged, repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION .
    Fig 54: Identifying C-28 Connector Location

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    Fig 55: Identifying C-77 Connector Location

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    Q: Are the wiring harness from vehicle speed sensor connector B-39 (terminal 3) to auto-cruise control-ECU connector C-20 (terminal 10), ECM < M/T > connector C-60 (terminal 86) <2.4L-M/T>, C-62 (terminal 80) <3.0L-M/T> and combination meter connector C-42 (terminal 30) in good condition? 

    1. YES:  Go to  Step 43
    2. NO:  Repair the wiring harness. The speedometer should work normally.
22. STEP 22. Using scan tool MB991958, read the diagnostic trouble code. 

    Check if an A/T system DTC is set.

    Fig 56: Connecting Scan Tool To Data Link Connector

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    Q: Is A/T diagnostic trouble code number "23" output? 

    1. YES:  Go to  Step 29.
    2. NO:  Go to Step 23.
23. STEP 23. Using scan tool MB991958, check data list item 29: Vehicle Speed Signal. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector.
       Fig 57: Connecting Scan Tool MB991958 To Data Link Connector

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    2. Start the engine.
    3. Set scan tool MB991958 to data reading mode for item 29: Vehicle Speed Signal.
       • Check that the speedometer and scan tool display speed match when driving at a vehicle speed of 40 km/h (25 mph).
    4. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Is the sensor operating properly? 

    1. YES:  This malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .
    2. NO:  Go to Step 24.
24. STEP 24. Using the oscilloscope, check the waveform at PCM connector C-57 <2.4L> or C-59 <3.0L>. 
    1. Do not disconnect connector C-57 <2.4L> or C-59 <3.0L>.
       Fig 58: Identifying C-57 And C-59 Connectors Location

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    2. Connect an oscilloscope probe to PCM connector C-57 <2.4L> or C-59 <3.0L> terminal 80 by backprobing.
       Fig 59: Connecting Oscilloscope Probe To PCM Connector C-57

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    3. Start the engine.
    4. Check the waveform.
       • The waveform should show a pattern similar to the illustration when running the vehicle.
         Fig 60: Identifying Waveform

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    5. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Is the waveform normal? 

    1. YES:  Go to Step 25.
    2. NO:  Go to  Step 26.
25. STEP 25. Check connector C-57 <2.4L> or C-59 <3.0L> at PCM for damage. 
    Fig 61: Checking Connector C-57 Or C-59 At PCM For Damage

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    Q: Is the connector in good condition? 

    1. YES:  Go to  Step 28.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
26. STEP 26. Check the combination meter connector C-42 and PCM connector C-57 <2.4L> or C-59 <3.0L> for damage. 
    Fig 62: Identifying C-42 Connector Location

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    Fig 63: Identifying Connectors C-57 And C-59 Location

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    Q: Are the connectors in good condition? 

    1. YES:  Go to Step 27.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
27. STEP 27. Check wiring harness between combination meter connector C-42 (terminal 30) and PCM connector C-57 (terminal 80) <2.4L> or C-59 (terminal 80) <3.0L>. 
    Fig 64: Identifying C-57 And C-59 Connectors

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    Fig 65: Identifying C-42 Connector Location

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    NOTE: After checking, joint connector C-77 and intermediate connector C-28, check the wires. If joint connector C-77 and intermediate connector C-28 are damaged, repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION .
    Fig 66: Identifying C-28 Connector Location

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    Fig 67: Identifying C-77 Connector Location

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    Q: Are the wiring harness from combination meter connector C-42 (terminal 30) and PCM connector C-57 (terminal 80) <2.4L> or C-59 (terminal 80) <3.0L> in good condition? 

    1. YES:  Go to Step 28.
    2. NO:  Repair the wiring harness.
28. STEP 28. Using scan tool MB991958, check data list item 29: Vehicle Speed Signal. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector.
       Fig 68: Connecting Scan Tool MB991958 To Data Link Connector

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    2. Start the engine.
    3. Set scan tool MB991958 to data reading mode for item 29: Vehicle Speed Signal.
       • Check that the speedometer and scan tool display speed match when driving at a vehicle speed of 40 km/h (25 mph).
    4. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Is the sensor operating properly? 

    1. YES:  This malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .
    2. NO:  Replace the PCM.
29. STEP 29. Using scan tool MB991958, check data list item 23: Output Shaft Speed Sensor. 
    1. Set scan tool MB991958 to data reading mode for item 23: Output Shaft Speed Sensor.
       • When driving at constant speed of 50km/h (31 mph), the display should be "1,600 - 1,900 r/min." <2.4L Engine>, "1,300 - 1,600 r/min." <3.0L Engine> (Gear range: 3rd gear)
       Fig 69: Identifying Data Link Connector Location
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    2. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Is the sensor operating properly? 

    1. YES:  This malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .
    2. NO:  Go to Step 30.
30. STEP 30. Check the ground voltage at PCM connector C-50 <2.4L> or C-52 <3.0L> by backprobing. 
    1. Do not disconnect connector C-50 <2.4L> or C-52 <3.0L>.
       Fig 70: Identifying C-50 And C-52 Connectors

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    2. Turn the ignition switch to the "ON" position.
    3. Measure the voltage between terminal 16 and ground by backprobing.
       • The measured value should be 0.5 volt or less.
         Fig 71: Measuring Voltage Between Terminal 16 And Ground

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    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Does the measured voltage correspond with this range? 

    1. YES:  Go to  Step 32.
    2. NO:  Go to Step 31.
31. STEP 31. Check connector C-50 <2.4L> or C-52 <3.0L> at PCM for damage. 
    Fig 72: Checking Connector C-50 Or C-52 At PCM For Damage

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    Q: Is the connector in good condition? 

    1. YES:  Go to Step 32.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
32. STEP 32. Check the sensor output voltage at PCM connector C-61 <2.4L> or C-63 <3.0L> by backprobing. 
    1. Do not disconnect connector C-61 <2.4L> or C-63 3.0L>.
       Fig 73: Disconnecting Connector C-61 Or C-63

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    2. Disconnect connector B-38 at the output shaft speed sensor.
    3. Turn the ignition switch to "ON" position.
    4. Measure the voltage between terminal 104 and ground by backprobing.
       • The measured value should be between 4.9 and 5.1 volts.
         Fig 74: Measuring Voltage Between Terminal 104 And Ground

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    5. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Does the measured voltage correspond with this range? 

    1. YES:  Go to  Step 35.
    2. NO:  Go to Step 33.
33. STEP 33. Check connectors C-61 <2.4L> or C-63 <3.0L> at PCM and B-38 at output shaft speed sensor for damage. 
    Fig 75: Identifying C-61 And C-63 Connectors Terminals

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    Fig 76: Identifying B-38 Connector Location

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    Q: Are the connectors in good condition? 

    1. YES:  Go to Step 34.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
34. STEP 34. Check harness for short circuit to ground between PCM connector C-61 <2.4L> or C-63 <3.0L> (terminal 104) and output shaft speed sensor connector B-38 (terminal 2). 
    Fig 77: Identifying C-61 And C-63 Connectors

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    Fig 78: Identifying B-38 Connector

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    Q: Are the wiring harness from PCM connector C-61 <2.4L> or C-63 <3.0L> (terminal 104) and output shaft speed sensor connector B-38 (terminal 2) in good condition? 

    1. YES:  Go to Step 35.
    2. NO:  Repair the wiring harness.
35. STEP 35. Using the oscilloscope, check the waveform at PCM connectors C-50, C-61 <2.4L> or C-52, C-63 <3.0L> by backprobing. 
    1. Do not disconnect connectors C-50, C-61 <2.4L> or C-52, C-63 <3.0L>.
       Fig 79: Disconnecting Connectors C-50, C-61 Or C-52, C-63

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    2. Connect an oscilloscope probe to PCM connector C-50 <2.4L> or C-52 <3.0L> terminal 16 and to PCM connector C-61 <2.4L> or C-63 <3.0L> terminal 104 by backprobing.
       Fig 80: Connecting An Oscilloscope Probe To PCM Connector C-50

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    3. Start the engine and run at constant speed of 50km/h (31mph). (Gear range: 3rd gear)
    4. Check the waveform.
       • The waveform should show a pattern similar to the illustration. The maximum value should be 4.8 volts and more and the minimum value 0.8 volts and less. The output waveform should not contain the noise.
         Fig 81: Identifying Waveform

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    5. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Does the measured voltage correspond with this range? 

    1. YES:  Go to Step 36.
    2. NO:  Go to  Step 37.
36. STEP 36. Check connectors C-50, C-61 <2.4L> or C-52, C-63 <3.0L> at PCM for damage. 
    Fig 82: Checking Connectors C-50, C-61 Or C-52, C-63 At PCM For Damage

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    Q: Are the connectors in good condition? 

    1. YES:  Go to  Step 24.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
37. STEP 37. Check connectors C-50, C-61 <2.4L> or C-52, C-63 <3.0L> at PCM and B-38 at output shaft speed sensor for damage. 
    Fig 83: Identifying C-50,C-61,C-52 And C-63 Connectors

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    Fig 84: Identifying B-38 Connector Location

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    Q: Are the connectors in good condition? 

    1. YES:  Go to Step 38.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
38. STEP 38. Check for continuity at output shaft speed sensor connector B-38. 
    1. Disconnect connector B-38 and measure at the harness side.
       Fig 85: Disconnecting Connector B-38

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    2. Check for the continuity between terminal 1 and ground.
       • The measured value should be 2 ohm or less.
         Fig 86: Checking For Continuity Between Terminal 1 And Ground

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    Q: Does the measured resistance value correspond with this range? 

    1. YES:  Go to Step 39.
    2. NO:  Go to  Step 41.
39. STEP 39. Check the sensor output voltage at output shaft speed sensor connector B-38. 
    1. Disconnect connector B-38 and measure at the harness side.
       Fig 87: Disconnecting Connector B-38

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    2. Turn the ignition switch to "ON" position.
    3. Measure the voltage between terminal 2 and ground.
       • The measured value should be between 4.9 and 5.1 volts.
       Fig 88: Measuring Voltage Between Terminal 2 And Ground
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    4. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Does the measured voltage correspond with this range? 

    1. YES:  Go to Step 40.
    2. NO:  Repair it because of harness open circuit between output shaft speed sensor connector B-38 terminal 2 and PCM connector C-61 <2.4L-A/T>, C-63 <3.0L-A/T> terminal 104.
40. STEP 40. Check the power supply voltage at output shaft speed sensor connector B-38. 
    1. Disconnect connector B-38 and measure at the harness side.
       Fig 89: Identifying B-38 Connector Location

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    2. Turn the ignition switch to "ON" position.
    3. Measure the voltage between terminal 3 and ground.
       • The measured value should be 12 volts (battery positive voltage).
       Fig 90: Measuring Voltage Between Terminal 3 And Ground
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    4. Turn the ignition switch to "LOCK" (OFF) position.

    Q: Does the measured voltage correspond with this range? 

    1. YES:  Go to  Step 43.
    2. NO:  Go to Step 41.
41. STEP 41. Check connectors C-50, C-61 <2.4L> or C-52, C-63 <3.0L> at PCM for damage. 
    Fig 91: Checking Connectors C-50, C-61 Or C-52, C-63 At PCM For Damage

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    Q: Are the connectors in good condition? 

    1. YES:  Go to Step 42.
    2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
42. STEP 42. Check wiring harness between PCM connectors C-50 (terminal 16), C-61 (terminal 104) <2.4L> or C-52 (terminal 16), C-63 (terminal 104) <3.0L> and junction block connector C-111 (terminal 6). 
    Fig 92: Identifying C-50, C-61, C-52 And C-63 Connectors

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    Fig 93: Identifying C-111 And C-112 Connectors Location

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    NOTE: After checking, intermediate connector C-28 and junction block connector C-112, check the wires. If intermediate connector C-28 and junction block connector C-112 are damaged, repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION .
    Fig 94: Identifying C-28 Connector Location

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    Q: Are wiring harness between the PCM connectors C-50 (terminal 16), C-61 (terminal 104) <2.4L> or C-52 (terminal 16), C-63 (terminal 104) <3.0L> and junction block connector C-111 (terminal 6) in good condition? 

    1. YES:  Go to Step 43.
    2. NO:  Repair or replace the wiring harness. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
43. STEP 43. Check each equipment. 

    Disconnect auto-cruise control-ECU connector C-20 and combination meter connector C-42 in that order one by one. Then check that MFI system DTC P0500 does not reset under any conditions.

    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    Fig 95: Identifying C-20 Connector

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    Fig 96: Identifying C-42 Connector

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    1. Connect scan tool to the data link connector.
       Fig 97: Connecting Scan Tool To Data Link Connector

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    2. Turn the ignition switch to "ON" position.
    3. Read the MFI system diagnostic trouble code.

    Q: Does MFI system DTC P0500 reset when one of auto-cruise control-ECU or combination meter, ECM < M/T > or PCM < A/T > is disconnected? 

    1. YES:  Go to Step 44.
    2. NO:  Replace the auto-cruise control-ECU, combination meter or ECM < M/T > or PCM < A/T > where applicable. The speedometer should work normally.
44. STEP 44. Recheck for malfunction. 

    Q: Is a malfunction eliminated? 

    1. YES:  The procedure is complete (If no malfunctions are not found in all steps, an intermittent malfunction is suspected. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
    2. NO:  Replace the speedometer.