Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
INSPECTION1. Turn Ignition on.
Idle Air Control Valve Connector Terminal Pin Identification.:
2. Disconnect the two pin connector at the Idle Air Control (IAC) Valve. Measure Voltage between the YELLOW/BLACK wire and chassis ground. Voltage should read battery voltage. (If not, repair YELLOW/BLACK wire between the IAC Valve and the PGM-FI main relay).
3. Turn ignition off. Reconnect the two pin connector at the IAC Valve. Install Test Harness at the main wire harness only, not the Programmed Fuel Injection Electronic Control Module (PGM-FI ECM).
PGM-FI ECM Connector Description And Wire Location:
4. Turn ignition on. Momentarily connect A9 terminal to A26 terminal several times. The IAC Valve should click. If not, inspect/repair BLACK/BLUE wire between the IAC Valve and the PGM-FI ECM terminal A9. If wire is OK then replace the IAC Valve.