B1100

Low Speed Radiator Fan Relay. Short to B+s

Fault symptoms
Cars with 1-speed radiator fan:
- Fan runs continuously (also with ignition OFF).
- Battery is discharged.
- Radiator fan not working, can lead to engine overheating.

Cars with 2-speed radiator fan:
- Fan runs at low speed continuously (also with ignition OFF).
- Battery is discharged.
- Radiator fan operates only at high speed, which may lead to increased engine temperature.

Conditions
Control module output is monitored and if there is a short-circuit to ground/B+ or in the relay circuit, a diagnostic trouble code will be generated.

Diagnostic help
The output from the control module can be activated using the diagnostics instrument.