DTC 65

DTC 65 Chart:

Cruise Control System Circuit:

CIRCUIT DESCRIPTION
The PCM applies 5 volts to the cruise control servo position sensor through PCM terminal "F9" and receives a returned frequency from servo terminal "B" (CKT 398). Depending on the actual servo position, the AC frequency will vary indicating to the PCM the position of the servo blade. The PCM uses this information to control the servo position when cruise is engaged.

DTC 65 WILL SET WHEN
- CKT 398 is opened, grounded or shorted to voltage.
OR
- CKT 399 is opened.

ACTION TAKEN (PCM WILL DEFAULT TO)
- The PCM will not allow cruise control operation with a current DTC 65 set.
- DTC 65 does not illuminate the Malfunction Indicator Lamp (MIL) (Service Engine Soon).

DTC 65 WILL CLEAR WHEN
The fault no longer exists and the ignition switch is cycled "OFF" and "ON."

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. Checking if the PCM and circuitry to the cruise control servo is OK.
2. Servo position sensor voltage should be 4.6 to 5.1 volts.
3. Checking the integrity of CKT(s) 398 and 399.
4 Checking CKT 398 for an open or short to ground.
5. Checking for a bad PCM.

DIAGNOSTIC AIDS
An intermittent may be caused by a poor connection, rubbed through wire insulation, or a wire broken inside the insulation.
Check for
- Poor connection or damaged harness - Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection. and damaged harness.