Sending Unit Test

Sending Unit Test

A RED wire
B positive terminal
C ECT sending unit

1. Disconnect the RED wire from the engine coolant temperature (ECT) sending unit.
2. With the engine cold, use an ohmmeter to measure resistance between the positive terminal and the engine (earth).
3. Check the temperature of the coolant.
4. Run the engine and measure the change in resistance with the engine at operating temperature (radiator fan comes on).

5. If the readings you get are substantially different from the specifications above, replace the ECT sending unit.

BRAKE WARNING SYSTEM

Parking Brake Switch Test

A Parking brake lever
B Positive terminal
C 1 – P connector
D Body earth
E Down
F Up

1. Remove the rear console see BODY.
2. Disconnect the 1 – P connector from the parking brake switch.
3. here should be continuity between the positive terminal and body earth with the brake lever up. There should be no continuity with the brake lever down.