CHECK POWER SUPPLY CIRCUIT TO FUEL PUMP CONTROL UNIT.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from fuel pump control unit.

3) Turn the ignition switch to ON.

4) Measure the voltage between fuel pump control unit and chassis ground.

Connector & terminal

(R122) No. 3 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the power supply circuit.

NOTE:

In this case, repair the following item:

• Open or ground short circuit of harness between fuel pump relay and fuel pump control unit

• Poor contact of fuel pump control unit connector

• Poor contact of fuel pump relay connector