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Diagnostic trouble code B1102 , B1103 , B1104 , B1105

Diagnostic trouble code B1102 , B1103 , B1104 , B1105


Measures


1. Check that fuses 3 (1-speed radiator fan or 2-speed radiator fan, low speed) and 4 (2-speed radiator fan, high speed) in the engine compartment's distribution centre are intact and that there is power to the fuses.

2. With the ignition key in drive position, check that there is power to the control coil on relay connection 86. The relay for the 1-speed radiator fan and the 2-speed radiator fan low speed position is situated in relay position G in the engine compartment. There is a relay for the 2-speed radiator fan high speed position in relay position I in the engine compartment.


If there is no power, check the wiring between the fuse and the relay for any open circuits/short circuits.

3. Connect the diagnostics instrument and select "ACTIVATE RELAY" in the menu. Depending on which relay is to be checked, select the next activation command, such as "RADIATOR FAN LOW".


Check connection 85 on the relay with a voltmeter, i.e. the relay should be in place but slightly raised. Repeat point 3 and read the voltmeter as follows:

Relay activated - 0 V

Relay not activated - 12 V

If the voltages are not correct, remove the relay and check that the resistance between pins 85 and 86 is 50-100 Ohm.

If this is not the case, fit a new relay.

4. If the resistance is correct, check that the pins for each connection in the relay holder are securely fitted and that the relay is properly pressed down.

5. When the ignition is switched off, a BOB can be connected to the ICE wiring (control module disconnected). Check the cable between the ICE control module's connection 9 (2-speed radiator fan, high speed) or 12 (1-speed radiator fan and 2-speed radiator fan, low speed) and the relay holder's connection 85 as regards an open circuit short circuit to ground.


Attend to any faulty wiring or connector.