Inspection Procedure 9: Button Illumination of RV Meter does not Illuminate.




CIRCUIT OPERATION


When the ignition switch is turned to the ACC position, the button illuminations of RV meter illuminate.

COMMENTS ON TROUBLE SYMPTOM


Power supply wire of button illumination (wire from ETACS-ECU to RV meter) or earth wire of button illumination (from RV meter to combination meter), RV meter, ETACS-ECU, or combination meter may be faulty.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE

STEP 1.Check the RV meter power supply.

Q. Is the abnormal voltage screen displayed immediately after the ignition switch is turned to the ACC position?

Go to Step 2.
There is no action to be taken.

STEP 2. M.U.T-III other system diagnosis code.
Check whether the ETACS-ECU diagnosis code is set.

Q. Is the diagnosis code set?
Diagnose ETACS-ECU (Refer to ).
Go to Step 3.

STEP 3. Check of combination meter trouble symptom
Check whether the combination meter trouble symptom is present. (Refer to .)

Q. Is a trouble symptom present?
Diagnose the combination meter. (Refer to .)
Go to Step 4.

STEP 4. Check the following connector: C-108 RV meter connector, C-113 combination meter connector



Q. Is the check result normal?

Go to Step 5.

Repair the defective connector.

STEP 5. Check the harness wire between C-108 RV meter connector terminal No.12 and C-113 combination meter connector terminal No.15.



note Prior to the wiring harness inspection, check joint connector C-09, and repair if necessary.

  • Check the earth circuit.

Q. Is the check result normal?

Go to Step 6.

Repair the wiring harness.

STEP 6. Check the following connector C-220 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 7.

Repair the defective connector.

STEP 7. Check the harness wire between C-108 RV meter connector terminal No.4 and C-220 ETACS-ECU connector terminal No.34.





  • Check the earth circuit.

Q. Is the check result normal?

Go to Step 8.

Repair the wiring harness.

STEP 8. Recheck for malfunction.

Q. Is a malfunction eliminated?
If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to GROUP 00,How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .
Replace the RV meter.