INSPECTION PROCEDURE 8: Tachometer does not Work (other meters work).

COMMENTS ON TROUBLE SYMPTOM

If only the tachometer does not operate, the engine-ECU <M/T> or engine-A/T-ECU <A/T> system may not be sending ignition signal, or the combination meter, the wiring harness or its connector may be defective.

POSSIBLE CAUSES

Malfunction of combination meter
Damaged harness wires and connectors

DIAGNOSTIC 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 satisfactory?

	Go to Step 2.

	Repair the CAN bus lines (Refer to GROUP 54F, Diagnosis - Can Bus Diagnostic Table ). After diagnosing the CAN bus lines, go to Step 5.

Step 2. M.U.T.-III other system diagnosis code

Check whether the MPI system-related diagnosis code is set.

Q. Is the diagnosis code set?

	Diagnose MPI system. (Refer to GROUP 13A, Troubleshooting or GROUP 13B, Troubleshooting .) After diagnosing the MPI system, go to Step 5.

	Go to Step 3.

Step 3. M.U.T.-III data list

Item No.87: Tachometer (Refer to .)

Q. Is the check result satisfactory?

	Go to Step 4.

	Diagnose MPI system. (Refer to GROUP 13A, Troubleshooting or GROUP 13B, Troubleshooting .) After diagnosing the MPI system, go to Step 5.

Step 4. M.U.T.-III actuator test

Item No.84: Tachometer: 0 r/min
Item No.85: Tachometer: 2000 r/min
Item No.86: Tachometer: 5000 r/min

OK: The tachometer operates.

Q. Is the check result satisfactory?

	Go to Step 5.

	Replace the combination meter and then go to Step 5.

Step 5. Retest the system.

Check that the tachometer works normally.

Q. Is the check result satisfactory?

	The procedure is complete.

	Go to Step 1.