INSPECTION PROCEDURE 1: Speedometer does not work (the other meters work). <L.H. drive vehicles>

[54A] CHASSIS ELECTRICAL - - COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR - SYMPTOM PROCEDURES - INSPECTION PROCEDURE 1: Speedometer does not work (the other meters work). <L.H. drive vehicles>

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SYMPTOM PROCEDURES

TECHNICAL DESCRIPTION (COMMENT)

The engine-A/T-ECU and its associated components, the combination meter assembly, the wiring harness, or the connector(s) may be defective.

TROUBLESHOOTING HINTS

Malfunction of the engine-A/T-ECU

Malfunction of the combination meter assembly

The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector.

DIAGNOSIS PROCEDURE

STEP 1. Check the speedometer.

Connect the MUT-II/III to the diagnosis connector.

Use the MUT-II/III to enter simulated vehicle speed.

Q: Does the speedometer show that simulated vehicle speed?

YES: Go to Step 5

.
NO: Go to Step 2

STEP 2. Connector check: Combination meter connector C-04 and diagnosis connector C-24 for damage.

Q: Is combination meter connector C-04 and diagnosis connector C-24 in good condition?

YES: Go to Step 3

.
NO: Repair or replace the damage component(s).

STEP 3. Check the wiring harness between combination meter connector C-04 (terminal 46) and diagnosis connector C-24 (terminal 14).

NOTE: Prior to the wiring harness inspection, joint connector (3) C-02, and repair if necessary.

Q: Is the wiring harness between combination meter connector C-04 (terminal 46) and diagnosis connector C-24 (terminal 14) in good condition?

YES: Go to Step 4

.
NO: Repair or replace the damage component(s).

STEP 4. Retest the system.

Q: Is the fuel speedometer normal?

YES: The procedure is complete. (If 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

).
NO: Replace the combination meter assembly.

STEP 5. MUT-II/III diagnosis code

Q: Is the MPI-related diagnosis code set?

Code No.24 is set: GROUP 13B - Troubleshooting

.
Code No.P0500 is set: GROUP 13C - Troubleshooting

.
NO: Go to Step 6

STEP6. Connector check: Joint connector C-02 and engine-A/T-ECU connector C-110 <2400-Except MIVEC> or C-136 <2400-MIVEC>.

Q: Is joint connector C-02 and engine-A/T-ECU connector C-110 <2400-Except MIVEC> or C-136 <2400-MIVEC> in good condition?

YES: Go to Step 7

.
NO: Repair or replace the damage component(s).

STEP 7. Check the wiring harness between joint connector (3) C-02 (terminal 25) and engine-A/T-ECU connector C-110 (terminal 80) <2400-Except MIVEC> or C-136 (terminal 79) <2400-MIVEC>.

NOTE: Prior to the wiring harness inspection, check intermediate connectors C-105, and repair if necessary.

Q: Is the wiring harness between joint connector (3) C-02 (terminal 25) and engine-A/T-ECU connector C-110 (terminal 80) <2400-Except MIVEC> or C-136 (terminal 79) <2400-MIVEC> in good condition?

YES: Go to Step 8

.
NO: Repair or replace the damage component(s).

STEP 8. Retest the system.

Q: Is the speedometer normal?

YES: The procedure is complete. (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

).
NO: Go to Step 9

STEP 9. Pulse check

Use the MUT-II/III or a voltmeter to check that the vehicle speed signal is received.

NOTE: Drive the vehicle with the MUT-II/III connected to the diagnosis connector. The MUT-II/III buzzer should sound.

System switch	Check conditions
Vehicle speed signal	When the vehicle speed has reached 10 km/h or more

OK: The MUT-II/III sounds or the voltmeter needle fluctuates.

Q: Is the check result normal?

YES: Replace the combination meter assembly.
NO: Replace the engine-A/T-ECU.

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