CHECK INPUT SIGNAL OF ECM.

1) Connect the connector to ECM.

2) Turn the ignition switch to ON.

3) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B137) No. 17 (+) — Chassis ground (−):

QUESTION

Is the voltage 2 V or more?

Yes No

Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE:

In this case, temporary poor contact of connector may be the cause.

Repair the poor contact of ECM connector.