P062

Code PO62:

PCM Wiring:

DESCRIPTION:
Code P062 will set if the PCM output POO8 is commanding the vacuum solenoid 'OFF' and the feedback current is indicating that it is 'ON' or if the PCM is commanding the vacuum solenoid 'ON' and the feedback current is indicating that it is 'OFF' for 0.5 second.

TEST CONDITIONS:
Test continuously.

FAILURE CONDITIONS:
1. Cruise vacuum solenoid commanded 'OFF' but solenoid feedback indicating the solenoid is 'ON' for 0.5 second.

2. Cruise vacuum solenoid commanded 'ON' but feedback indicating the solenoid is 'OFF' for 0.5 second.

ACTION TAKEN:
PCM disables cruise control.

NOTES ON FAULT TREE:
1. Checking if the cruise control servo is bad or if the control circuitry is bad. The frequency should cycle between zero and a non-zero number. If the DVOM stays at zero it must be a circuit fault or the PCM.

2. Checking for a short to voltage on CKT 402.

3. Checking CKT 450 for an open.

4. Checking the PCM's ability to control the cruise control servo. Voltage should cycle between 0 and 12 volts. If it does not cycle, check CKT 402 for an open.