CHECK SECONDARY AIR COMBINATION VALVE RELAY POWER SUPPLY.

1) Turn the ignition switch to ON.

2) Measure the voltage between the secondary air combination valve relay connector and chassis ground.

Connector & terminal

(F9) No. 1 (+) — Chassis ground (−):

(F9) No. 4 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the open or ground short circuit of harness of power supply circuit.