Troubleshooting

TROUBLESHOOTING
Symptom: Vehicle speed cannot be set. (Cruise control unit will not hold vehicle speed.)
Note: Before troubleshooting of the system, verify the following items:
1. Is system being correctly used by customer?
2. Is fuse OK?
Check the fuse. If the fuse is burned, replace it. Check the wire harness for a short circuit.






Step 1
1. Turn the ignition switch ON.
2. Turn the cruise control main switch ON.
3. Check that the main switch indicator lamp comes ON.
4. If the lamp does not come ON, go to Step 2.
5. If the lamp comes ON, go to Step 3.











Step 2
1. Check continuity between terminals of the cruise control main switch.
2. If not as specified, replace the switch.
3. If the switch is OK, repair the wire harness. (METER 1OA fuse - Cruise control main switch - Ground)






AUTOTRANS






MANUAL TRANS

Step 3
1. Measure the voltage at the following terminal-wires of the cruise control unit connector.
2. If all terminal voltage are OK, replace the cruise control unit.

Note: When checking j terminal, disconnect the EGI control unit connector.
















Step 4 - Inspection of brake switch
1. Disconnect the brake switch connector.
2. Check continuity between terminals of the switch.
3. If not as specified, replace the brake switch.
4. If the switch is OK, repair the wire harness. (Fuse - Brake switch - Control unit)











Step 5 - Inspection of clutch switch
1. Disconnect the clutch switch connector.
2. Check continuity between terminals of the switch.
3. If not as specified, replace the clutch switch.
4. If the switch is Ok, repair the wire harness (Fuse - Clutch switch - Control unit).











Step 6 - Inspection of cruise control switch
1. Remove the knee protector and disconnect the combination switch connector.
2. Check continuity between terminals of the combination switch connector.











Step 7 - Inspection of stoplight switch
1. Disconnect the stoplight switch.
2. Check continuity between terminals of the switch.
3. If not as specified, replace the stoplight switch.
4. If the switch is OK, repair the wire harness. (Cruise control unit - Stoplight switch)











Step 8 - Inspection of actuator
1. Measure the actuator solenoid resistance using an ohmmeter.
2. If not as specified, replace the actuator.
3. If continuity is OK, go to Step 8-4.
4. Disconnect the actuator cable from the accelerator pedal.
5. Run the engine at idle speed.











6. Apply 12V to the following terminals, and check actuator operation.
7. If not as specified, replace the actuator.






Step 9 - Inspection of speed sensor
1. Remove the instrument cluster.
2. Check continuity between terminals 2D and 2F while rotating the speedometer cable.
3. If there are not four pulses per shaft rotation, replace the speed sensor.
4. If there are four pulses per rotation, check the wire harness (Instrument cluster - Control unit).
5. If the wiring is OK, replace the cruise control unit.