## Cruise Control

#### Cruise Control Communication Circuit Troubleshooting (A/T)

4-43

1. Start the engine.
2. Turn on the cruise control main switch, then drive the vehicle to speeds over 25 mph (40 km/h) with the cruise control.

Does the cruise control operate?

YES - Go to step 3.

NO - Check the cruise control unit (see page 4-44) or cruise control actuator.

3. Turn the ignition switch OFF.
4. Disconnect ECM/PCM connector E (31P) and cruise control unit 14P connector.
5. Check for continuity between ECM/PCM connector terminal E12 and body ground.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there continuity?

YES - Repair short to ground in the wire between PCM connector terminal E12 and the cruise control unit 14P connector terminal No. 8.

NO - Go to step 6.

6. Reconnect ECM/PCM connector E (31P) and the cruise control unit 14P connector.

7. Connect a voltmeter between the No. 8 terminal of the cruise control unit 14 P connector and body ground. Test-drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter.

CRUISE CONTROL UNIT 14P CONNECTOR

Wire side of female terminals

Is there about 1 V?

YES - Go to step 8.

NO - Replace the cruise control unit.

8. Connect a voltmeter between ECM/PCM connector terminal E12 and body ground. Drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there about 1 V?

YES - Check for loose connectors. If necessary replace the ECM/PCM and recheck (see page 11-3) or 5-door (see page 11-309).

NO - Repair open in the wire between ECM/PCM connector terminal E12 and the control unit 14P connector terminal No. 8.