Cruise control – fault diagnosis

CRUISE CONTROL – FAULT DIAGNOSIS

Test C 1C

CONDITIONS Ignition Switch

Position: II

Cruise Control Switch

On

RESULTS Steering Wheel Switches

SET/ACCEL Switch

BAT VOLT On = Off = 0 V

OK

2C

2C

CONDITIONS Ignition Switch

Position: 0

RESULTS Steering Wheel Switches

SET/ACCEL Switch

= On Less than 1 ohm Off More than 10K ohms =

OK PROBLEM CAUSE - YS,R Wire - Rotary Coupler

- Steering Wheel Switches

V C0239

10 18 9 1

SY

Z121 Cruise Control ECU

OK GO TO TEST D

C0895

YS

Z249 Cruise Control Converter/Inverter Module

OK PROBLEM CAUSE - Cruise Control Converter/ Inverter Module