Engine Control System

DTC 24
IDLE AIR CONTROL SOLENOID VALVE






Diagnosis
- The Idle Air Control Solenoid Valve is not in function.
- The harness connector between Engine Control Module (ECM) and Idle Air Control Solenoid Valve is in short or open.

Trouble Symptom
- Erroneous idling.
- Engine stalls.
- Engine breathing.

1. Check input signal from ECM.
a. Turn Ignition Switch to "ON".






b. Measure voltage between ECM and body.

Connector & Terminal / Specified Voltage:
(E29) No. 2 - Body / 0 Volts --> 13 Volts
(E29) No. 1 - Body / 13 Volts --> 0 Volts

2. Check Idle Air Control Solenoid Valve.
a. Turn Ignition Switch to "OFF".
b. Disconnect connector from Idle Air Control Solenoid Valve.






c. Measure resistance between Solenoid Valve Terminals.

Terminals / Specified Resistance:
No. 1 - No. 2 / 32 Ohms.
No. 2 - No. 3 / 32 Ohms.

3. Check power supply to Idle Air Control Solenoid Valve.
a. Turn Ignition Switch to "ON".






b. Measure voltage between Idle Air Control Solenoid Valve and body.

Connector & Terminal / Specified Voltage:
(E11) No. 2 - Body / 1O Volts minimum