CHECK FUEL INJECTOR DRIVE POWER SUPPLY.

1) Connect the connector to ECM.

2) Turn the ignition switch to ON.

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

Connector & terminal

(B135) No. 73 (+) — Chassis ground (−):

(B135) No. 49 (+) — Chassis ground (−):

QUESTION

Is the voltage 4 — 7 V?

Yes No

Repair the poor contact of ECM connector.