Cruise control – fault diagnosis

CRUISE CONTROL – FAULT DIAGNOSIS

Test D 1D

CONDITIONS Ignition Switch

Position: II

RESULTS Brake Pedal

Depressed BAT VOLT = Released 0 V =

OK PROBLEM CAUSE - GP Wire - W Wire - Stop Lamp Switch

2D CONDITIONS Ignition Switch

Position: II

Cruise Control Switch

On

Transfer Box

Hi Range

Gear Selector

Forward Gear

RESULTS Brake Pedal

Depressed = 0 V BAT VOLT Released =

OK PROBLEM CAUSE - OR, ON Wire - Brake Switch Vent Valve

- Body Electrical Control Module (BECM)

GP C243

Z121 Cruise Control ECU

OK

2D

V

OR C243

Z121 Cruise Control ECU

OK

3D