Cruise control – fault diagnosis

CRUISE CONTROL – FAULT DIAGNOSIS

2D

3D

CONDITIONS Ignition Switch

Position: II

Turn a drive wheel by hand

RESULTS

= 5V with ignition position II = 2.5V approx. with wheels turning

OK PROBLEM CAUSE - Y, YR Wire - Body Electrical Control Module (BECM)

4D

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

OK PROBLEM CAUSE - OU, OR Wire - Cruise Control Vacuum Pump

V Y LHD RHD YR C243

Z121 Cruise Control ECU

OK

4D

OU

C243

OR OR Z121 Cruise Control ECU

OK

5D