Window Defogger System

WINDOW / GLASS: WINDOW DEFOGGER SYSTEM: TERMINALS OF ECU

1. CHECK AIR CONDITIONING AMPLIFIER





(a) Disconnect the E36 air conditioning amplifier connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.





* If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the E36 air conditioning amplifier connector.

(d) Measure the voltage according to the value(s) in the table below.





* If the result is not as specified, the air conditioning amplifier or fuse may have a malfunction.

2. CHECK AIR CONDITIONING CONTROL ASSEMBLY (w/o Multi-display)





(a) Disconnect the F10 air conditioning control assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.





* If the result is not as specified, there may be a malfunction on the wire harness side.

3. CHECK MULTI-DISPLAY





(a) Disconnect the F47 multi-display connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.





* If the result is not as specified, there may be a malfunction on the wire harness side.