B1100

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.