Fault Code Nos.
Fault Code No.: Er-3     Diagnostic Code No.: ---
Item: ECU (engine control unit) internal malfunction (output signal error): data from the ECU cannot be
          received correctly.
Fail-Safe System: Able to start engine | Able to Drive Vehicle
Indicated: ---
Procedure: ---
               Probable Cause of                                                       Confirmation of Service
  Item       Malfunction and Check            Maintenance Job              Completion
1
Connection of meter assembly coupler.

Check the locking condition
of the coupler.

Disconnect the coupler and
check the pins (bent or broken terminals and locking
condition of the pins).
Improperly connected.

Connect the coupler securely or replace the wire harness.
Turn the main switch to "ON".

If the Fault code number is not displayed, the Service is finished.

If however, the Fault code number is displayed, then go to item 2.
2
Connection of ECU coupler.

Check the locking condition
of the coupler.

Disconnect the coupler and
check the pins (bent or broken terminals and locking
condition of the pins).
Improperly connected.

Connect the coupler securely or replace the wire harness.
Turn the main switch to "ON".

If the Fault code number is not displayed, the Service is finished.

If however, the Fault code number is displayed, then go to item 3.
3
Wire harness continuity.
Open or short circuit.

Replace the wire harness.

Between meter coupler and ECU coupler,
(Yellow/Blue-Yellow/Blue)
Turn the main switch to "ON".

If the Fault code number is not displayed, the Service is finished.

If however, the Fault code number is displayed, then go to item 4.
4
Defective meter assembly.
Replace the meter assembly.
Turn the main switch to "ON".

If the Fault code number is not displayed, the Service is finished.

If however, the Fault code number is displayed, then go to item 5.
5
Malfunction in ECU.
Replace the ECU.
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