Inspection Procedure 16: Shift Position Indicator Light System

INSPECTION PROCEDURE 16: Shift Position Indicator Light System





CIRCUIT OPERATION
^ The PCM detects the transmission range ("P," "R," "N," "D" and sport mode "5 [5A/T]," "4," "3," "2," or "1"), and display it on the combination meter.

COMMENT
Connector(s), wiring harness in the CAN bus line between the PCM and the combination meter, power supply to the PCM, the combination meter, the PCM may be defective.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CONDITION:)
^ Malfunction of the combination meter
^ Damaged harness, connector
^ Malfunction of the PCM

DIAGNOSIS

Required Special Tool:
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991827: M.U.T.-III USB Cable
^ MB991910: M.U.T.-III Main Harness.

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.





CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Use scan tool MB991958 to diagnose the CAN bus lines.

1) Connect scan tool MB991958 to the data link connector.
2) Turn the ignition switch to the "ON" position.
3) Diagnose the CAN bus line.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result properly?
YES: Go to Step 2.
NO: Repair the CAN bus lines (Refer to Diagnosis-CAN Bus Diagnostic Chart CAN Bus Diagnostics Table).

STEP 2. Using scan tool MB991958, read the MFI diagnostic trouble code.





1) Connect scan tool MB991958 to the data link connector.
2) Turn the ignition switch to the "ON" position.
3) Check for MFI diagnostic trouble code.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1108 set?
YES: Refer to [2.4L Engine], Diagnostic Trouble Code Procedures U1108 DTC U1108: Combination Meter-ECU CAN Communication Time Out or refer to [3.8L Engine], Diagnostic Trouble Code Procedures U1108 DTC U1108: Combination Meter-ECU CAN Communication Time Out.
NO: Replace the PCM. When the PCM is replaced, register the encrypted code. Refer to Encrypted Code Registration Criteria Table Procedures.