Inspection Procedure 4: The combination meter lamp does not illuminate normally or the multi information display is not displayed normally.

caution

Before replacing the combination meter, be sure to check that the power supply circuit, earth circuit, and communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

When the signal from each ECU is received via the CAN communication, the combination meter illuminates the corresponding display lamp or warning lamp, or has the multi information display to display corresponding information.
If the lamps do not illuminate or the multi information display does not display normally, the wiring harness and connector(s) in the CAN bus lines, each ECU (that sends a signal) or the combination meter may have a problem.

PROBABLE CAUSES

Malfunction of combination meter
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. 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 2.

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting

STEP 2. M.U.T.-III diagnosis code

Check again if the diagnosis code is set in the combination meter.

Q. Is the diagnosis code set?

Refer to

Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code

Check again if the diagnosis code is set in the Engine-ECU, A/T-ECU <A/T>, Transfer-ECU <4WD>, ABS-ECU <Vehicles without ASTC> or ASTC-ECU <Vehicles with ASTC>, FCM-ECU <Vehicles with FCM>, Electric parking brake ECU <A/T>, KOS&OSS-ECU <Vehicles with KOS>, SRS-ECU, Clearance warning control unit <Vehicles with reversing sensor system, corner sensor system or blind spot warning>, ETACS-ECU and A/C-ECU <Vehicles with automatic A/C>.

Q. Is the diagnosis code set in the any of the above?

Set in the engine. : Troubleshoot the engine control system (Refer to GROUP 13B - Troubleshooting <4D5>, GROUP 13C - Troubleshooting <4N1> or GROUP 13E - Troubleshooting

<4D5>).

Set in the A/T-ECU. : Troubleshoot the A/T (Refer to GROUP 23A - Diagnosis code chart).

Set in the Transfer-ECU. : Troubleshoot the ES4/SS4 (Refer to GROUP 23A - Diagnosis code chart).

Set in the ABS-ECU. : Troubleshoot the ABS (Refer to GROUP 35B - Troubleshooting).

Set in the ASTC-ECU. : Troubleshoot the ASTC (Refer to GROUP 35C - Troubleshooting).

Set in the FCM-ECU. : FCM (Refer to GROUP 35C - Troubleshooting).

Set in the Electric parking brake ECU. : Troubleshoot the Electric parking brake (Refer to GROUP 36 - Troubleshooting).

Set in the KOS&OSS-ECU. : Troubleshoot the KOS (Refer to GROUP 42B - Troubleshooting).

Set in the SRS-ECU. : Troubleshoot the SRS (Refer to GROUP 52B - Troubleshooting).

Set in the Clearance warning control unit. : Troubleshoot the Clearance warning control unit.

Set in the ETACS-ECU. : Troubleshoot the ETACS-ECU.

Set in the A/C-ECU. : Troubleshoot the A/C (Refer to GROUP 55B - Troubleshooting).

The diagnosis code is not set.

: Go to Step 4.

STEP 4. M.U.T.-III Special Function

Using M.U.T.-III, select "Test" from the special function of the combination meter. Execute the following item to check the liquid crystal display.

Item 2: LCD (AUTO)
Item 5: Illumination (AUTO)
Item 6: Indicator (AUTO)

Q. Is the check result normal?

Go to Step 5.

Replace the combination meter, and then go to Step 5.

STEP 5. Retest the system

Check that display lamps or warning lamps are illuminated normally, or multi information display is displayed normally.

Q. Is the check result normal?

The procedure is complete. (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to GROUP 00 / How to Cope with Intermittent Malfunction).

Go to Step 1.