Entry Lights Control System (Body Control Module and Door Multiplex Control Unit) Input Test
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
Before testing, make sure the No. A18 (10 A) and No. A21 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B8 (15 A)*1/(20 A)*2 fuse in the under-dash fuse/relay box is OK.

*1: Except K20C1 engine
*2: K20C1 engine

Body Control Module

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

2.
Disconnect body control module connectors A, C, D, and E.

NOTE: All connector views are shown from the wire side of the 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
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A18 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
E1
BLU
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B8 (15 A)*4/(20 A)*5 fuse in the under-dash fuse/relay box
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 (G501)
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 (G501)
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
A3*1
•
A13*1
LT GRN
•
PUR
Ceiling light switch in MIDDLE position
Connect terminal A3 to ground, and terminal A13 to ground with jumper wires:
The ceiling light should come on.
Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
Blown bulb
Faulty ceiling light
Faulty interior lights cut relay
An open or high resistance in the wire
A3*2
•
A13*2
LT GRN
•
PUR
Interior light switch in DOOR position and ceiling light switch in MIDDLE position
Connect terminal A3 to ground, and terminal A13 to ground with jumper wires:
The front individual map lights and the ceiling light should come on.
Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
Blown bulb
Faulty front individual map lights
Faulty ceiling light
Faulty interior light switch
Faulty interior lights cut relay
An open or high resistance in the wire
A3*3
•
A5*3
LT GRN
•
RED
In all power modes
Connect terminal A3 to ground, and terminal A5 to ground with jumper wires:
The ignition key light should come on.
Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
Faulty LED
Faulty interior lights cut relay
An open or high resistance in the wire
D26*3
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 (G505) 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
*1: Without moonroof
*2: With moonroof
*3: Without keyless access system
*4: Except K20C1 engine
*5: K20C1 engine

Door Multiplex Control Unit

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

6.
Disconnect the power window master switch 37P connector.
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.
Blown No. A18 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
18
BRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B9 (10 A) fuse in the under-dash fuse/relay box
An open or high resistance in the wire
3
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G502)
An open or high resistance in the ground wire
29
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
21
YEL
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 (G501) 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 (G501) 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 power window master switch.