CHECK POWER SUPPLY FOR PRESSURE SWITCH.

1) Disconnect the connector from the pressure switch.

2) Turn the ignition switch to ON.

3) Measure the voltage between pressure switch harness connector and chassis ground.

Connector & terminal

(B7) No. 1 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the harness of pressure switch power supply circuit.