CHECK INPUT SIGNAL OF ECM.

1) Turn the ignition switch to ON. (engine OFF)

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

Connector & terminal

(B135) No. 10 (+) — Chassis ground (−):

QUESTION

Is the voltage 4.75 V or more?

Yes No

Even if the malfunction indicator light illuminates, the circuit has returned to a normal condition at this time. Temporary poor contact of connector may be the cause.

NOTE:

In this case, repair the following item:

• Poor contact in fuel pump connector

• Poor contact of coupling connector