P068

Code PO68:

PCM Wiring:

DESCRIPTION:
This diagnostic test checks for a cruise control servo feedback reading significantly higher or lower than the commanded value for a period of time. If such a condition occurs, Code P068 is set and cruise control is disabled.

TEST CONDITIONS:
Cruise control engaged.

FAILURE CONDITIONS:
1. Throttle angle greater than 20 degrees.

2. The servo position sensor indicating a stroke at least 7% greater than the commanded value for 2 seconds.

ACTION TAKEN:
PCM disables cruise control for the entire ignition cycle.

NOTES ON FAULT TREE:
1. Checking if PS07 is able to fully retract cruise control servo.

2. Checking if PS07 is able to fully relax cruise control servo.

3. Checking if binding or a short to voltage on CKT 403 is keeping the cruise control servo from fully relaxing.