Description
When one of the steering wheel audio control switches is pushed, the resistance in the steering wheel audio control switch circuit changes, depending on which button is pushed.
Diagnosis Procedure
1.CHECK STEERING SWITCH RESISTANCE


2.CHECK HARNESS BETWEEN COMBINATION SWITCH(SPIRAL CABLE) AND AV CONTROL UNIT


3.COMBINATION SWITCH(SPIRAL CABLE) CHECK


AMP on signal circuit
Communication signal circuitParking, license plate and tail lamps system
Wiring Diagram
...
Additional service when replacing control unit (bcm)
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Description
BEFORE REPLACEMENT
When replacing BCM, save or print current vehicle specification with CONSULT
configuration before replacement.
NOTE:
If "Before Replace ECU" cannot be used, use the "After Replace ECU" or ...
B2578, B2579 in-vehicle sensor
Description
In-vehicle Sensor
The in-vehicle sensor (1) is located on instrument lower cover
(LH).
It converts variations in compartment air temperature drawn from
the aspirator into a resistance value. It is then input into the A/C
auto amp.
In-vehicle Sensor Circuit
Aspira ...