Inspection Procedure 18: Abnormal shift indicator display

OPERATION


The engine-A/T-ECU detects the shift range (sport mode) which the driver has selected, and sends the information to the combination meter.

COMMENTS ON TROUBLE SYMPTOM


Connector(s) or wiring harness in the CAN bus lines between the engine-A/T-ECU and the combination meter, the power supply system to the engine-A/T-ECU, the combination meter, or the engine-A/T-ECU may be defective.
PROBABLE CAUSES

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

  • Item 61: Inhibitor switch (Refer to data list reference table ).

Q. Is the check result normal?
Go to Step 2.
Refer to Inspection procedure 16: Inhibitor switch system .

STEP 2. M.U.T.-III data list

  • Item 67: Select switch
  • Item 68: Upshift switch
  • Item 69: Downshift switch
Check the above data list (Refer to data list reference table ).

Q. Is the check result normal?
Go to Step 3.
Refer to inspection procedure 17: shift switch assembly system .

STEP 3. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 4.
Repair the CAN bus lines (Refer to GROUP 54F - Troubleshooting )

STEP 4. M.U.T.-III actuator test
Execute combination meter actuator test.

  • Item A2: All shift position indicator lamps illuminate.
  • Item A3: All shift position indicator lamps go out.
OK: All shift position indicator lamps illuminate or go out.

Q. Is the check result normal?
Go to Step 5.
Replace the combination meter.

STEP 5. Replace the engine-A/T-ECU.
Replace the engine-A/T-ECU and check the trouble symptom.

Q. Is the check result normal?
The inspection is complete.
Replace the combination meter.