P1510

P1510
Idle Control Valve Opening Coil - Open

P1513
Idle Control Valve Opening Coil - Open

P1514
Idle Control Valve Opening Coil - Open

Function
The Idle Air Control (IAC) Valve has two coils. Both coils receive alternately current and create opposing forces at the pivoted armature which creates an opening cross section coinciding with the duty cycle of the received current.

Diagnostic conditions
A fault is recognized and stored in memory when the engine speed is higher than 80 1/min and the battery voltage is between 7.5 Volt and 17 Volt.

NOTE: If a fault occurs that would lead to very high engine speed, a late adjustment of the ignition angle sets in to act as an engine speed limiter.





Wiring Diagram

Diagnostic procedure





DTC P1510





DTC P1513





DTC P1514

Check coil resistance of IAC Valve.
1. Remove connector for IAC Valve.
2. Connect ohmmeter to pin 2 and 3 at IAC Valve.
- Specified value: 10 - 12 ohms at 20°C.

Check wiring from ECM to IAC Valve for short circuit to B+.
1. Remove connector for IAC Valve.
2. Remove ECM connector.
3. Connect voltmeter to ECM connector, pin 29 and to ground.
- Specified value: 0 Volt
- If meter reads battery voltage, check wiring for chafing and pinching damage.

Check wiring from ECM to IAC Valve for short circuit to ground.
1. Remove connector for IAC Valve
2. Remove ECM connector.
3. Connect ohmmeter to ECM connector, pin 29 and to ground.
- Specified value: infinite resistance
- If meter reads 0 - 5 ohms, check wiring for chafing and pinching damage.

Check wiring from ECM to IAC Valve for B+ short to ground.
1. Remove connector for IAC Valve.
2. Remove ECM connector.
3. Connect voltmeter to ECM connector, pin 2 and to ground.
- Specified value: 0 Volt
- If meter reads battery voltage, check wiring for chafing and pinching damage.