Keyless/Power Door Locks/Security System (MICU, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) 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. A21 (10 A) fuse in the under-hood fuse/relay box is OK.
Before testing, make sure the No. B1 (7.5 A), No. B5 (7.5 A), No. B19 (10 A), No. B20 (10 A), No. B21 (10 A), No. B22 (10 A), No. B23 (10 A), No. B32 (20 A), No. B33 (20 A), No. B41 (10 A), and No. B42 (20 A) fuses in the under-dash fuse/relay box are OK.
Before testing, make sure the headlights, parking lights, side marker lights, taillights, turn signal lights, and horns are work properly.
There are two pairs of fuses in the same circuit (No. B21 and No. B23 fuses, No. B20 and No. B41 fuses, and No. B19 and No. B22 fuses). If one fuse is blown, make sure to check the other fuse in the same circuit. If necessary, replace the blown fuse(s).

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.
With the connectors still disconnected, 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 5.

NOTE: These are door lock actuator operation tests for keyless entry.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
T2
TAN
Connect terminals F1*1 and T2 (or T8), and terminal T8 (or T2) and ground with jumper wires.
Check actuator operation:
The driver's door lock actuator should LOCK (or UNLOCK).
Faulty driver's door lock actuator
An open or high resistance in the wire
T8
YEL
S3
BLU
Connect terminals F1*1 and S3 (or S6), and terminal S6 (or S3) and ground with jumper wires.
Check actuator operation:
The front passenger's door lock actuator and right rear door lock actuator*2 should LOCK (or UNLOCK).
Faulty front passenger's door lock actuator
Faulty right rear door lock actuator*2
An open or high resistance in the wire
S6
RED
D2*2
TAN
Connect terminals F1*1 and D2 (or D11), and terminal D11 (or D2) and ground with jumper wires.
Check actuator operation:
The left rear door lock actuator should LOCK (or UNLOCK).
Faulty left rear door lock actuator
An open or high resistance in the wire
D11*2
YEL
D17
ORN
Connect terminals F1*1 and D17 with a jumper wire momentarily.
Check actuator operation:
The trunk lid release actuator should work.
Faulty trunk lid release actuator
Poor ground (G603) or an open in the ground wire
An open or high resistance in the wire
*1: Use a fused jumper wire with an appropriate amperage fuse.
*2: 4-door

5.
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, go to step 6 (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
F1
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A12-1 (60 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
An open or high resistance in the wire
D16
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
E7
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 (G401)
An open or high resistance in the ground 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
E15
BLU
Hood closed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty security hood switch
Poor ground (G301) or an open in the ground wire
An open or high resistance in the wire
Hood open
Measure the voltage to ground:
There should be about 5 V.
Faulty security hood switch
A short to ground in the 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*3
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*5
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
D29*5
GRY
Left rear door lock knob switch in UNLOCK
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty left rear door lock knob switch
Poor ground (G601) or an open in the ground wire
An open or high resistance in the wire
Left rear door lock knob switch in LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty left rear door lock knob switch
A short to ground in the wire
S17*5
GRY
Right rear door lock knob switch in UNLOCK
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty right rear door lock knob switch
Poor ground (G652) or an open in the ground wire
An open or high resistance in the wire
Right rear door lock knob switch in LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty right rear door lock knob switch
A short to ground in the wire
D37
WHT
Trunk open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty trunk lid latch switch
Poor ground (G603) or an open in the ground wire
An open or high resistance in the wire
Trunk closed
Measure the voltage to ground:
There should be about 5 V.
Faulty trunk lid latch switch
A short to ground in the wire
E17*1
GRY
Transmission range switch in P
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty or improperly adjusted transmission range switch
Poor ground (G101) or an open in the ground wire
An open or high resistance in the wire
Transmission range switch in any other position than P
Measure the voltage to ground:
There should be about 5 V.
Faulty or improperly adjusted transmission range switch
A short to ground in the wire
P22*2
PNK
Ignition key inserted into the ignition key cylinder
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty ignition key switch
Poor ground (G502) or an open in the ground wire
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
E8
LT GRN*6
YEL*7
Brake pedal pressed
Measure the voltage to ground:
There should be battery voltage.
Blown No. A6 (10 A) fuse in the under-hood fuse/relay box
Faulty under-dash fuse/relay box
Faulty brake pedal position switch
Faulty brake light relay*7
An open or high resistance in the wire
A short to ground in the wire
Brake pedal released
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty brake pedal position switch
Faulty brake light relay*7
An open or high resistance in the wire
P19*3
WHT
Trunk lid opener main switch in ON
Measure the voltage to ground:
There should be less than 0.2V.
Faulty trunk lid opener main switch
Poor ground (G506) or an open in the ground wire
An open or high resistance in the wire
Trunk lid opener main switch in OFF
Measure the voltage to ground:
There should be about 5 V.
Faulty trunk lid opener main switch
A short to ground in the wire
P3*4
PUR
Driver's door key cylinder switch in LOCK
Measure the voltage to ground:
There should be less than 0.2V.
Faulty driver's door key cylinder switch
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Driver's door key cylinder switch in neutral or UNLOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty driver's door key cylinder switch
A short to ground in the wire
P4*4
RED
Driver's door key cylinder switch in UNLOCK
Measure the voltage to ground:
There should be less than 0.2V.
Faulty driver's door key cylinder switch
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Driver's door key cylinder switch in neutral or LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty driver's door key cylinder switch
A short to ground in the wire
P9*4
BLU
Driver's door lock knob switch in LOCK
Measure the voltage to ground:
There should be less than 0.2V.
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 UN 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
P10*4
LT BLU
Driver's door lock knob switch in UN LOCK
Measure the voltage to ground:
There should be less than 0.2V.
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
P5*4
GRN
Driver's door lock switch in LOCK
Measure the voltage to ground:
There should be less than 0.2V.
Faulty driver's door lock switch
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Driver's door lock switch in UN LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty driver's door lock switch
A short to ground in the wire
P6*4
PNK
Driver's door lock switch in UN LOCK
Measure the voltage to ground:
There should be less than 0.2V.
Faulty driver's door lock switch
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Driver's door lock switch in LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty driver's door lock switch
A short to ground in the wire
P11*4
YEL
Front passenger's door lock knob switch in UNLOCK
Measure the voltage to ground:
There should be less than 0.2V.
Faulty front passenger's door lock knob switch
Poor ground (G506) or an open in the ground wire
An open or high resistance in the wire
Front passenger's door lock knob switch in LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty front passenger's door lock knob switch
A short to ground in the wire
P8*4
TAN
Front passenger's door lock switch in LOCK
Measure the voltage to ground:
There should be less than 0.2V.
Faulty front passenger's door lock switch
Poor ground (G506) or an open in the ground wire
An open or high resistance in the wire
Front passenger's door lock switch in UN LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty front passenger's door lock switch
A short to ground in the wire
P7*4
LT GRN
Front passenger's door lock switch in UN LOCK
Measure the voltage to ground:
There should be less than 0.2V.
Faulty front passenger's door lock switch
Poor ground (G506) or an open in the ground wire
An open or high resistance in the wire
Front passenger's door lock switch in LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty front passenger's door lock switch
A short to ground in the wire
*1: A/T, CVT
*2: Without keyless access system
*3: With keyless access system
*4: Without door multiplex control unit
*5: 4-door
*6: Without ACC
*7: With ACC

Door Multiplex Control Unit

6.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7.
Disconnect the power window master switch 37P connector.

8.
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 9.

9.
With the connector still disconnected, 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 10.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
36
LT BLU
Disconnect the front passenger's power window switch 37P connector and the moonroof control unit/motor 14P connector
Check for continuity between terminal No. 36 and front passenger's power window switch 37P connector terminal No. 34:
There should be continuity.
An open in the LIN (P/W) wire
Check for continuity between terminal No. 36 and moonroof control unit/motor 14P connector terminal No. 12:
There should be continuity.
An open in the LIN (P/W) wire
Check for continuity to ground:
There should be no continuity.
A short to ground in the LIN (P/W) wire

10.
Reconnect the connector, 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 11.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
25
LT GRN
Ignition switch ON (II) or power mode ON
Measure the voltage to ground:
There should be battery voltage.
Blown No. B1 (7.5 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
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-hood fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
4
WHT
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B32 (20 A) fuse in the under-dash 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, disconnect the driver's power window motor 6P connector
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
35
PUR
Driver's door key cylinder switch in LOCK
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door key cylinder switch
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Driver's door key cylinder switch in neutral or UNLOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty driver's door key cylinder switch
A short to ground in the wire
34
RED
Driver's door key cylinder switch in UNLOCK
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door key cylinder switch
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Driver's door key cylinder switch in neutral or LOCK
Measure the voltage to ground:
There should be about 5 V.
Faulty driver's door key cylinder switch
An open or high resistance in the 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
An open or high resistance in the wire
Front Passenger's Power Window Switch

11.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode., open and close the driver's door.

12.
Disconnect the front passenger's power window switch 37P connector.

13.
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 14.

14.
With the connector still disconnected, 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 15.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
34
LT BLU
Disconnect the power window master switch 37P connector and the moonroof control unit/motor 14P connector
Check for continuity between terminal No. 34 and power window master switch 37P connector terminal No. 36:
There should be continuity.
An open in the LIN (P/W) wire
Check for continuity between terminal No. 34 and moonroof control unit/motor 14P connector terminal No. 12:
There should be continuity.
An open in the LIN (P/W) wire
Check for continuity to ground:
There should be no continuity.
A short to ground in the LIN (P/W) wire

15.
Reconnect the connector, 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 16.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
4
GRN
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B33 (20 A) fuse in the under-dash 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 (G506)
An open or high resistance in the ground wire
29
YEL
Front passenger's door lock knob switch in UNLOCK
Measure the voltage to ground:
There should be less than 0.2 V.
Front passenger's door lock knob switch
Poor ground (G506) or an open in the ground wire
An open or high resistance in the wire
Front passenger's door lock knob switch in LOCK
Measure the voltage to ground:
There should be about 5 V.
Front passenger's door lock knob switch
A short to ground in the wire

16.
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 control unit.