Cruise control – fault diagnosis

CRUISE CONTROL – FAULT DIAGNOSIS

4D

5D

CONDITIONS Ignition Switch

Position: II

Cruise Control Switch

On

Transfer Gearbox

Hi Range

Gear Selector

Forward Gear

Brake Pedal

Released

RESULTS Cruise Control Vacuum Pump

Operates Valve Closes Throttle Opens Wide

OK PROBLEM CAUSE - OK Wire - Cruise Control Vacuum Pump

Test E 1E CONDITIONS Ignition Switch

Position: II
Cruise Control Switch On

Gear Selector

Forward Gear
Clutch Pedal Released

RESULTS

BAT VOLT

OK

2E

OK OU OR C243

OR Z121 Cruise Control ECU

OK PROBLEM CAUSE - Cruise Control ECU

OW C241D

V

B

Z249 Cruise Control Converter/ Inverter Module

OK GO TO TEST F