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 DISPLAY AND NAVIGATION MODULE DISPLAY





(a) Disconnect the F53 display and navigation module 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.