P062

Diagnostic Trouble Code P062:

Cruise Control Circuit:

CIRCUIT DESCRIPTION
Code P062 will set if the Powertrain Control Module (PCM) output P009 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" 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 Digital Volt Meter (DVM) stays at zero, it must be a circuit fault or the PCM.
2. Checking for a short to voltage on CKT 205.
3. Checking CKT 451 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 205 for an open.