Fault Diagnosis

PRELIMINARY CHECKS PRIOR TO TESTING
1. Ignition switch "ON".
2. Fuse C-5 "OK".
3. Cruise Control master switch "ON".
4. Shift lever in D.
5. Minimum 12.0V (Battery) available.

FAULT DIAGNOSIS
If the system does not function the following checks must be carried out:
- Fuse C-5 - intact
- Vacuum hoses - not split or disconnected
- Actuator - diaphragm ruptured
- Vacuum Pump - motor operational
- Brake Switch - faulty or out of adjustment
- Speed Transducer - faulty - check operation of unit
- Electrical Leads - loose connections - faulty leads
- Stop Lamp Bulbs - both bulbs faulty - replace: Fuse A-5 intact
- Neutral Relay operational.


CRUISE CONTROL OPERATIONAL CHECKS
All system testing may be performed with a multi-meter and jumper wire at the cruise control ECU connector.

Pin ID:

Pin ID - Connector To ECU

Color coding/function of wiring to plug:

TERMINAL NO. COLOR FUNCTION

1. White/Yellow Main power from master switch
2. Red/White 12V + from set switch (when pressed)
3. Purple/Green Ground via vent valve switch and brake light filaments
4. Black/Red To vacuum pump motor
5. Yellow To speed transducer
6. Blue/White 12V + from resume switch (when pressed)
7. Black/Yellow To vacuum pump solenoid valve
8. Black ECU ground

Testing:

TEST PROCEDURE

VACUUM SYSTEM TEST
See Vacuum Pump, Cruise Control. Testing and Inspection