Inspection Procedure
9: 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?
Diagnose the combination meter.
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>, ACC/FCM-ECU <Vehicles with FCM>, electric parking brake
ECU <Vehicles with electric parking brake>, KOS&OSS-ECU <Vehicles
with KOS&OSS>, 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 <6B3>,
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 ACC/FCM-ECU. : Troubleshoot the ACC or FCM (Refer to GROUP 17 - Troubleshooting ,
or 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&OSS (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.
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).