CHECK FUEL INJECTOR OPERATION 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

(B134) No. 20 (+) — Chassis ground (−):

(B134) No. 21 (+) — Chassis ground (−):

QUESTION

Is the voltage 4 — 7 V?

Yes No

Repair the poor contact of the ECM connector.