Town & Country Van AWD V6-230 3.8L VIN L SMFI (1998)
THEORY OF OPERATION
The BCM interfaces with the power coor lock, unlock, arm and disarm switches via a single wire circuit (Door Switch MUX) for each door zone.
Each zone functions independently of each other. Each switch inside the door has a unique resistance value which when activated sends a voltage
level to the BCM. The BCM will interpret the different levels and perform the desired function.
POSSIBLE CAUSES
-
Shorted right front door lock switch
-
Body control module
Right Door Unlock Switch Failure
NAME OF CODE
Right Door Unlock Switch Failure
WHEN MONITORED
Anytime battery voltage is above 10 volts and BCM is awake.
SET CONDITION
The BCM senses a voltage of 1.0 volts (+/-250mV) on the RF door switch MUX circuit for longer than 8 seconds.
THEORY OF OPERATION
The BCM interfaces with the power door lock, unlock, arm and disarm switches via a single wire circuit (Door Switch MUX) for each door zone.
Each zone functions independently of each other. Each switch inside the door has a unique resistance value which when activated sends a voltage
level to the BCM. The BCM will interpret the different levels and perform the desired function.
POSSIBLE CAUSES
-
Shorted right front door lock switch
-
Body control module
RT Front Door Mux CKT Short to GND
NAME OF CODE
RT Front Door MUX Ckt Short to Gnd
WHEN MONITORED
Anytime battery voltage is above 10 volts and BCM is awake.
SET CONDITION
The BCM senses a voltage below .4 volts on the RF door switch MUX circuit.
THEORY OF OPERATION
The BCM interfaces with the power door lock, unlock, arm and disarm switches via a single wire circuit (Door Switch MUX) for each door zone.
Each zone functions independently of each other. Each switch inside the door has a unique resistance value which when activated sends a voltage
level to the BCM. The BCM will interpret the different levels and perform the desired function.
POSSIBLE CAUSES
-
Shorted wire (RF Door Switch MUX)
-
Body control module
Horn Switch Failure
NAME OF CODE
Horn Switch Failure
WHEN MONITORED
Continuously with battery connected and IOD fuse installed.
SET CONDITION
The BCM has sole control of the horn relay. The BCM will monitor the horn switch (in the steering wheel) for an active signal and will sound the
horn. If the horn switch remains grounded for more than 30 seconds, the BCM will turn off the horn output and 10 seconds later will set the code.
The horn will remain disabled until the horn switch is ungrounded for 22 seconds to allow the horn to cool down.
POSSIBLE CAUSES
-
Shorted horn relay control circuit
-
Defective horn switch
-
Defective BCM
