Diesel Data: Automotive Repair

Vehicle Speed Signal Circuit

VEHICLE SPEED SIGNAL CIRCUIT

CIRCUIT DESCRIPTION

The A/C amplifier monitors signals from the speed sensor via the combination meter.

The A/C amplifier assy uses these signals to revise the ambient temperature sensor signal.

Check that the speedometer in the combination meter operates normally before inspecting the vehicle speed signal circuit.

If the meter does not operate normally, refer to the combination meter system.

Wiring Diagram:






Step 1:




Step 2:




INSPECTION PROCEDURE