ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0414 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE “A” CIRCUIT SHORTED

DTC DETECTING CONDITION:

Immediately at fault recognition

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode , and Inspection Mode .

WIRING DIAGRAM:

STEPCHECKYESNO

1.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 (−):

Is the voltage 10 V or more?

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.