Keyless/Power Door Locks/Security System (Body Control Module, 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. A18 and No. A24 fuses are OK.
Before testing, make sure the No. B8, No. B9, No. B11*, No. B12, No. B13, No. B15, No. B16, No. B25, No. B26, No. B28, No. B38, and No. B39 fuses are OK.
Before testing, make sure the headlights, parking lights, side marker lights, taillights, and horns work properly.
There are two pairs of fuses in the same circuit (No. B25 and No. B39 fuses, No. B12 and No. B26 fuses, No. B13 and No. B38 fuses). If one fuse is blown, make sure to check the other fuse in the same circuit. If necessary, replace the blown fuse(s).
*: Except L15BY engine

Body Control Module

1.
Turn the vehicle to the OFF (LOCK) 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
B28
GRY*2
GRN*3
Under all conditions
Connect to ground with a jumper wire:
The horns should sound.
Blown No. A24 fuse
Faulty horn relay
Faulty horn
An open or high resistance in the wire
D26*1
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
An open or high resistance in the wire
Poor ground (G503)
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 keyless access system
*2: Except L15BY engine
*3: L15BY engine

5.
Reconnect the connectors to the body control module, 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 6.

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 fuse
An open or high resistance in the wire
E1
PUR*5
BLU*6
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B8*6 fuse
Blown No. B11*5 fuse
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
B27
BLU
In all power modes
Connect to ground with a jumper wire:
The driver's door lock actuator, the front passenger's door lock actuator, the left rear door lock actuator, the right rear door lock actuator, and the fuel fill door lock actuator should LOCK.
Faulty power door lock relay circuit (LOCK)
Faulty driver's door lock actuator
Faulty front passenger's door lock actuator
Faulty left rear door lock actuator
Faulty right rear door lock actuator
Faulty fuel fill door lock actuator
An open or high resistance in the wire
B31
GRN
In all power modes
Connect to ground with a jumper wire:
The driver's door lock actuator and the fuel fill door lock actuator should UNLOCK.
Faulty power door lock relay circuit (DR UNLOCK)
Faulty driver's door lock actuator
Faulty fuel fill door lock actuator
An open or high resistance in the wire
B32
PUR
In all power modes
Connect to ground with a jumper wire:
The front passenger's door lock actuator, the left rear door lock actuator, and the right rear door lock actuator should UNLOCK.
Faulty power door lock relay circuit (UNLOCK)
Faulty front passenger's door lock actuator
Faulty left rear door lock actuator
Faulty right rear door lock actuator
An open or high resistance in the wire
B29
LT BLU
In all power modes
Connect to ground with a jumper wire:
The trunk lid release actuator should work.
Faulty trunk lid release actuator relay circuit
Faulty trunk lid release actuator
Poor ground (G701) or an open in the ground wire
An open or high resistance in the 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
C15
LT BLU
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 battery voltage.
Faulty left rear door lock knob switch
A short to ground in the wire
C16
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 (G602) 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 battery voltage.
Faulty right rear door lock knob switch
A short to ground in the wire
D27
WHT
Trunk lid open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty trunk lid latch switch
Poor ground (G701) or an open in the ground wire
An open or high resistance in the wire
Trunk lid closed
Measure the voltage to ground:
There should be battery voltage.
Faulty trunk lid latch switch
A short to ground in the wire
C19
BLU
Hood closed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty hood latch switch
Poor ground (G401*2/*3/*6, G402*4) 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 battery voltage.
Faulty hood latch switch
A short to ground in the wire
C1*1
GRN
Shift lever in P position/mode
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty transmission range switch
Poor ground (G201) or an open in the ground wire
An open or high resistance in the wire
Shift lever in any other position/mode than P
Measure the voltage to ground:
There should be battery voltage.
Faulty transmission range switch
A short to ground in the wire
*1: CVT
*2: L15B7 engine
*3: K20C2 engine (type A)
*4: K20C2 engine (type B)
*5: Except L15BY engine
*6: L15BY engine

Door Multiplex Control Unit

6.
Turn the vehicle to the OFF (LOCK) 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
WHT
Disconnect these connectors:
Front passenger's power window switch 37P connector
Moonroof motor-control unit 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 motor-control unit 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
*: With moonroof

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
18
BRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B9 fuse
An open or high resistance in the wire
37
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A18 fuse
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. B28 fuse
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
7
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 battery voltage.
Faulty driver's door key cylinder switch
A short to ground in the wire
8
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 battery voltage.
Faulty driver's door key cylinder switch
An open or high resistance in the 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
Front Passenger's Power Window Switch

11.
Disconnect the front passenger's power window switch 37P connector.
12.
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 13.

13.
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 14.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
34
WHT
Disconnect these connectors:
Power window master switch 37P connector
Moonroof motor-control unit 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 motor-control unit 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
*: With moonroof

14.
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 15.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
1
GRN
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B15 fuse
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 (G505)
An open or high resistance in the ground wire
36
TAN
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 (G505) 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 battery voltage.
Front passenger's door lock knob switch
A short to ground in the wire

15.
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.