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," "3," "2," "L," and sport mode "5 [5A/T]," "4," "3," "2," or "1"), and display it on the combination meter.

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

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.

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 A

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.

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:
NO: Replace the PCM. When the PCM is replaced, register the encrypted code.