Inspection Procedure 1: Power supply circuit check
Inspection Procedure 2: The odometer and the trip meter are not displayed.
Inspection Procedure 3: All the needle meters do not work.
Inspection Procedure 4: If the ignition switch is turned to the ON position, the indicator and warning lamps do not illuminate normally.












COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Damaged harness wires and connectors
  • Malfunction of combination meter

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if diagnosis code is set to the combination meter.

Q. Is the diagnosis code set?
Troubleshoot the combination meter. Refer to .
Go to Step 2.

STEP 2. Connector check: C-03 combination meter connector

Q. Is the check result normal?
Go to Step 3.
Repair the defective connector.

STEP 3. Voltage measurement at the C-03 combination meter connector
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the LOCK (OFF) position.
(3)Measure the voltage between the C-03 combination meter connector terminal No. 1, 24 and the body earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 5.
Go to Step 4.

STEP 4. Check the wiring harness between the battery (fusible link No. 34) and the C-03 combination meter connector terminal No. 1, 24.
note Before the wiring harness check, check the ETACS-ECU connectors C-307 and C-317, and repair them if necessary.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 5. Voltage measurement at the C-03 combination meter connector
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the ON position.
(3)Measure the voltage between the C-03 combination meter connector terminal No. 2 and the body earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 8.
Go to Step 6.

STEP 6. M.U.T.-III other system service data
Check the input signal from the ignition switch (IG1) in the ETACS-ECU.

  • Turn the ignition switch to the ON position.
Item No.
 Item name
 Normal condition
Item 254
 IG voltage
 System voltage
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 7.
NO : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 2 "The ignition switch (IG1) signal is not received." .

STEP 7. Check the wiring harness between the battery (fusible link No. 34) and the C-03 combination meter connector terminal No. 2.
note Before the wiring harness check, check the ETACS-ECU connectors C-309 and C-317, and repair them if necessary.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 8. Resistance measurement at the C-03 combination meter connector
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the C-03 combination meter connector terminal No. 13 and the body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 10.
Go to Step 9.

STEP 9. Wiring harness check between the C-03 combination meter connector terminal No. 13 and the body earth

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 10. Retest the system

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the combination meter.