P062

Circuit Description

Code P062 will set if the PCM output PO09 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 Condition(s)

Test continuously.

Failure Condition(s)

1. Cruise vacuum solenoid commanded 'OFF' and solenoid feedback indicating the solenoid is 'ON' for 0.5 second.
OR
2. Cruise vacuum solenoid commanded 'ON' and solenoid 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 not-zero value. If the DVM stays at zero, it must be a circuit fault or the PCM.
2. Checking CKT 402 for a short to voltage.
3. Checking CKT 450 for an open.
4. Checking PCM's ability to control the cruise control servo. The voltage should cycle between 0 and 12 volts. If it does, check CKT 402 for an open.