DTC 61

Cruise Vent Solenoid Circuit:

Code 61 Diagnostic Chart:

Circuit Description:
The cruise switch within the turn signal lever receives ignition voltage from a 15 amp fuse through CKT 639 to the turn signal lever-cruise switches. The cruise "ON/OFF," "SET/COAST," and "RESUME/ACCEL" switches are inputs to the cruise control portion of the PCM.

The cruise servo, vent and vac solenoids are the output lines and are controlled by high side drivers in the PCM. When the ignition is "ON" the PCM looks at these output lines and will set codes depending on the status of each line.

The vent solenoid is a normally open (de-energized) solenoid valve that allows any vacuum in the cruise servo to be depleted. When the solenoid is energized ("ON"), the cruise servo holds vacuum allowing the servo to stay retracted and hold open the throttle.

Code 61 will set when:

^ CKT 403 is shorted to voltage when the vent solenoid is commanded "OFF.
^ CKT 403 is open.
^ CKT 403 is shorted to ground when the PCM is commanding the vent solenoid "ON."
^ One of the above conditions are met for more than a half of a second.

Code 61 does not illuminate the "Service Engine Soon" light.


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.