Entry Lights Control System (Body Control Module and Door Multiplex Control Unit) Input Test
NOTE:
Make sure the fuses associated with the system is OK.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

Body Control Module

1.
Turn the vehicle to the OFF (LOCK) mode.

2.
Disconnect body control module connectors.
Body Control Module Connector A (14P) (female terminals):
Body Control Module Connector C (28P) (female terminals):
Body Control Module Connector D (40P) (female terminals):
Body Control Module Connector E (24P) (female terminals):
3.
Inspect the connectors and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals look OK, go to step 4.

4.
Reconnect the connectors to the body control module, and do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, then go to step 5.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
C27
WHT
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
E1
BLU
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
A2
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
A8
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
D22
GRN
Driver's door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door switch
Faulty driver's door switch ground
An open or high resistance in the wire
Driver's door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty driver's door switch
A short to ground in the wire
D23
LT GRN
Front passenger's door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty front passenger's door switch
Faulty front passenger's door switch ground
An open or high resistance in the wire
Front passenger's door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty front passenger's door switch
A short to ground in the wire
D24
BRN
Left rear door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty left rear door switch
Faulty left rear door switch ground
An open or high resistance in the wire
Left rear door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty left rear door switch
A short to ground in the wire
D28
GRY
Right rear door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty right rear door switch
Faulty right rear door switch ground
An open or high resistance in the wire
Right rear door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty right rear door switch
A short to ground in the wire
D26*
PNK
Ignition key inserted into the ignition key switch
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty ignition key switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Ignition key removed from the ignition key switch
Measure the voltage to ground:
There should be battery voltage.
Faulty ignition key switch
A short to ground in the wire
*: Without keyless access system

Door Multiplex Control Unit (Power Window Master Switch)

5.
Turn the vehicle to the OFF (LOCK) mode.

6.
Disconnect the power window master switch 37P connector.
Power Window Master Switch 37P Connector (female terminals)
7.
Inspect the connector and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals look OK, go to step 8.

8.
Reconnect the connectors to the power window master switch; do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 9.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
37
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
29
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
21
BLU
Driver's door lock knob switch in LOCK
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door lock knob switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Driver's door lock knob switch in UNLOCK
Measure the voltage to ground:
There should be battery voltage.
Faulty driver's door lock knob switch
A short to ground in the wire
20
LT BLU
Driver's door lock knob switch in UNLOCK
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door lock knob switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Driver's door lock knob switch in LOCK
Measure the voltage to ground:
There should be battery voltage.
Faulty driver's door lock knob switch
A short to ground in the wire

9.
If multiple failures are found on more than one control unit, replace the body control module. If input failures are related to a particular control unit, replace the control unit.