DTC 32: Cruise Control Switch Circuit

Perform CANCEL SWITCHES , RES/ACC and SET/COAST tests in CRUISE CONTROL FUNCTION TEST under TROUBLE SHOOTING. If SET/COAST, RES/ACC or CANCEL input signals are not as specified, go to next step. If input signals are as specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM DIAGNOSIS, perform next test listed.

Remove cruise control ECU with connector connected. See Figure. Turn ignition switch to ON position. Backprobing connector, measure voltage between cruise control ECU connector terminal No. 10 (White wire) and ground with switch in specified positions. See CRUISE CONTROL ECU VOLTAGE SPECIFICATIONS table. If voltage is not as specified, go to next step. If voltage is as specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM DIAGNOSIS, perform next test listed.

CRUISE CONTROL ECU VOLTAGE SPECIFICATIONS

Switch Position	Volts
Off	10-16
RES/ACC On	0.8-3.7
SET/COAST On	2.5-6.3
CANCEL On	4.2-8.8

Turn ignition switch to OFF position. Disable air bag system. See AIR BAG RESTRAINT SYSTEMS article. Remove steering wheel center pad (air bag module) and disconnect CRUISE control switch 6-pin connector. Measure resistance between cruise control switch connector terminals No. 3 (White/Black wire) and No. 4 (White wire) with switch in specified positions. See CRUISE CONTROL SWITCH RESISTANCE table. If resistance is as specified, go to next step. If resistance is not as specified, replace cruise control switch and retest system.

CRUISE CONTROL SWITCH RESISTANCE

Switch Position	Ohms
Off	One Megohm Or Greater
RES/ACC On	50-80
SET/COAST On	180-220
CANCEL On	400-440

Check wiring harness and connectors between cruise control ECU, cruise control switch and ground. Repair as necessary and retest system. If wiring harness and connectors are okay, go to next step.
Repeat step 1. If SET/COAST, RES/ACC or CANCEL input signals are still not as specified, replace cruise control ECU and retest system. If input signals are as specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM DIAGNOSIS, perform next test listed.