CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from the ECM and fuel injectors #3 and #4.

3) Turn the ignition switch to ON.

4) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 25 (+) — Chassis ground (−):

(B135) No. 26 (+) — Chassis ground (−):

(B135) No. 1 (+) — Chassis ground (−):

(B135) No. 3 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the short circuit to power in harness between ECM connector and fuel injector connectors.

Repair the poor contact of ECM connector.