Vanden Plas L6-4.2L (1982)
Trip Computer: Testing and Inspection
FAULT DIAGNOSIS
Check all fuses and connections. Ensure that earth connections are clean and tight. With the ignition switched off, 12 volts should be obtained on the
purple lead to the trip computer.
The voltmeter should give the following readings with the ignition switched on: 12 Volts at the green lead to the trip computer, the green lead to the
pulse generator, the green lead and the yellow/green lead to the interface unit.
With the engine running a voltage should be obtained at the orange lead to the computer. A zero reading indicates a faulty interface unit or lack of
continuity in the wiring between the computer and the interface unit. Re-check at the interface unit located in the luggage compartment.
With the rear of the vehicle jacked up and on stands, start the engine and put the vehicle into drive. A voltage should be obtained at the yellow lead to
the computer A zero reading indicates a faulty pulse generator or lack of continuity in the wiring between the pulse generator and the computer.
