Entry Lights Control System (MICU 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. A20 (7.5 A) and No. A21 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B5 (7.5 A) fuse in the under-dash fuse/relay box is OK.

MICU

1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

2.
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 under-dash fuse/relay box; 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, the MICU must be faulty; replace the under-dash fuse/relay box (includes the MICU). (Without door multiplex control unit)
If all the input tests prove OK, then go to step 5. (With door multiplex control unit)

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
E23
WHT
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
An open or high resistance in the wire
E18
GRN
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A20 (7.5 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
An open or high resistance in the wire
D30
BLK
In all ignition switch positions or all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G601)
An open or high resistance in the ground wire
P1
BLK
In all ignition switch positions or 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
BRN
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 about 5 V.
Faulty driver's door switch
A short to ground in the wire
S13
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 about 5 V.
Faulty front passenger's door switch
A short to ground in the wire
D23*1
LT GRN
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 about 5 V.
Faulty left rear door switch
A short to ground in the wire
S14*1
YEL
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 about 5 V.
Faulty right rear door switch
A short to ground in the wire
H12
?
P17
PNK
?
GRY
Ceiling light switch in DOOR position and interior light switch in DOOR position*2
Connect terminal H12 to ground, and terminal P17 to ground with jumper wires:
The ceiling light and front individual map lights*2 should come on.
Blown No. A20 (7.5 A) fuse in the under-hood fuse/relay box
Blown bulb
Faulty ceiling light
Faulty front individual map lights
Faulty interior light switch*2
Faulty interior light cut relay
An open or high resistance in the wire
P9*3
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 (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 about 5 V.
Faulty driver's door lock knob switch
A short to ground in the wire
P10*3
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 about 5 V.
Faulty driver's door lock knob switch
A short to ground in the wire
P22*4
PNK
Ignition key inserted into the ignition key cylinder
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G502) or an open or high resistance in the ground wire
Faulty ignition key switch
An open or high resistance in the wire
Ignition key removed from the ignition key cylinder
Measure the voltage to ground:
There should be about 5 V.
Faulty ignition key switch
A short to ground in the wire
P13*4
?
P17
RED
?
GRY
Under all conditions
Connect terminal P17 to ground, and terminal P13 to ground with jumper wires:
The ignition key light should come on.
Blown No. A20 (7.5 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
Faulty under-dash relay holder A
Faulty center junction box
Faulty interior light cut relay
Faulty LED
An open or high resistance in the wire
P17
GRY
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A20 (7.5 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
Faulty under-dash relay holder A
Faulty interior light cut relay
An open or high resistance in the wire
*1: 4-door
*2: With moonroof
*3: Without door multiplex control unit
*4: Without keyless access system

Door Multiplex Control Unit

5.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF 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 any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove 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
26
WHT
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
3
BLK
In all ignition switch positions or 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
31
BLK
In all ignition switch positions or 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
33
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 (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 about 5 V.
Faulty driver's door lock knob switch
A short to ground in the wire
32
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 about 5 V.
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 under-dash fuse/relay box (includes the MICU). If input failures are related to a particular control unit, replace the power window master switch.