Inspection Procedure 16

INSPECTION PROCEDURE 16: Shift Position Indicator Light System

Communication Circuit (CAN Communcation Line) Between PCM And Combination Meter:

CIRCUIT OPERATION
^ The PCM detects the transmission range (P, R, N, D, sport mode 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: USB Cable
- MB991910: 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.





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.

(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 DTC U1108: Combination Meter-ECU CAN Communication Time Out
NO: Replace the PCM.