Chart 6C-6 Idle Speed Control (ISC) Check

Chart 6C-6:

Vehicle Speed Sensor Circuit:

CIRCUIT DESCRIPTION:
The Idle Speed Control Check verifies proper ISC motor operation and checks ISC plunger adjustment. This check requires ISC adjusting wrench J 29607.

NOTES ON FAULT TREE:

1. This procedure checks for a high minimum air idle which could cause a high idle at closed throttle. Minimum air idle should be 450500 RPM.

2. Follow PCM Trouble Code P030 diagnosis to identify the cause of a faulty ISC motor.

3. This procedure determines ISC motor's ability to reach maximum extension. At maximum extension PD01 should read 13.0°-13.8° If it does not, adjust to within range.

4. TP SENSOR/IDLE LEARN procedure must be performed after ISC plunger adjustment.