CHECK HARNESS BETWEEN ECM AND SECONDARY AIR COMBINATION VALVE RELAY CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM.

3) Remove the secondary air combination valve relay.

4) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B135) No. 24 (+) — Chassis ground (−):

QUESTION
Is the voltage 10 V or more?
Yes	No
Repair the short circuit to power supply in harness between ECM and secondary air combination valve relay connector.	Repair the poor contact of ECM connector.