Coolant Temperature Warning Buzzer

Coolant Temperature Warning Buzzer Diagrams:

Coolant Temperature Warning Buzzer Components:

Locations of components

7 Earthing point
On the radiator cross-member

22 Fuse box
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

61 Windscreen wiper stalk switch
On the right-hand side of the steering column

129 Buzzer for coolant temperature
Under the facia, to the left of the steering column (behind the knee shield)

130 Coolant temperature warning switch
In the engine compartment, on the radiator hose

152B 29-pole red connector
In the electrical distribution box in the engine compartment, on the left-hand wheel housing. The connector is accessible from the interior of the car

269 Two-pole connector
Under the facia, behind the knee shield

Operation
Cars for the Middle-Eastern and Far-Eastern markets are equipped with a coolant temperature warning buzzer.

When the ignition switch is in the drive position, buzzer 129 is supplied from fuse 5, via the 29-pole red connector 152B. If the coolant temperature exceeds around + 120 °C, coolant temperature warning switch 130 will close and the buzzer will sound. The switch will open again at around +115 °C.

Fault-tracing hints
The buzzer will be operative when the ignition switch is in the drive position.

1. Check fuse 5 and check that the supply to it is live.

2. Check that the supply to the buzzer is live. The buzzer should sound when the cable to the temperature switch is earthed.

3. Check the temperature switch.

4. Check the connectors, cable harnesses and earth connections.