Cruise control – fault diagnosis

CRUISE CONTROL – FAULT DIAGNOSIS

1B

2B

CONDITIONS Ignition Switch

Position: II

Cruise Control Switch

On

RESULTS Steering Wheel Switches

RES/DECEL Switch BAT VOLT On = 0V Off =

OK

3B

3B

CONDITIONS Ignition Switch

Position: 0

RESULTS Steering Wheel Switches

RES/DECEL Switch On = Less than 1 ohm Off = More than 10K ohms

OK PROBLEM CAUSE - YR, W Wire - B, PB Wire - Steering Wheel Switches

- Rotary Coupler

V

RY C243

Z121 Cruise Control ECU

OK GO TO TEST C

C241P YR

Z249 Cruise Control Con- verter/Inverter Mod- ule

OK PROBLEM CAUSE - Cruise Control Converter/In- verter Module