DTC P0511: IAC Valve Circuit Malfunction

1. Turn the ignition switch ON (II).

1. Clear the DTC with the HDS.

1. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Is DTC P0511 indicated?

YES | - | Go to Step 4 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IAC valve and the ECM/PCM.■

1. Turn the ignition switch OFF.

1. Disconnect the IAC valve 3P connector.

1. Turn the ignition switch ON (II).

1. Measure voltage between IAC valve 3P connector terminal No. 2 and body ground.

Is there battery voltage?

YES | - | Go to Step 8 .
NO | - | Repair open in the wire between the IAC valve and PGM-FI main relay 1 (FI MAIN), then go to Step 22 .

1. Turn the ignition switch OFF.