Engine Control System

DTC 12
STARTER SWITCH






Diagnosis
- The Starter Switch signal is abnormal.
- The harness connector between Engine Control Module (ECM) and Starter Switch is in short or open.

Trouble Symptom
Failure of Engine to start.

1. Check operation of Starter Motor.
a. Turn Ignition Switch to "ST" to ensure that Starter Motor operates.

2. Check input signal for ECM.







- Measure voltage between ECM and body while cranking the Engine.

Connector & Terminal / Specified Voltage:
(E29) No. 12 - Body / 13 - 14 V



3. Check harness connector between ECM and Starter Motor.
a. Turn Ignition Switch to "OFF".
b. Disconnect connectors from ECM and Starter Motor.






c. Measure resistance of harness connector between ECM and Starter Motor.

Connector & Terminal / Specified Resistance:
(E29) No. 12 - (B1O) No. 1 / 10 Ohms.






d. Measure resistance of harness connector between Starter Motor and body to make sure that circuit does not short.

Connector & Terminal / Specified Resistance:
(B1O) No. 1 - Body / 1 M-Ohm, minimum