Keyless/Power Door Locks/Security System (Body Control Module, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) Input Test

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 .
Before testing, make sure the headlights, parking lights, side marker lights, taillights, and horns work properly.

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 B (36P) (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):

Courtesy of HONDA, U.S.A., INC.

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.

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
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 An open or high resistance in the wire Poor ground (G401)
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

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result is not obtained

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
An open or high resistance in the wire
Poor ground (G401)

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

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	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
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, and the right rear 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 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 should UNLOCK.	Faulty power door lock relay circuit (DR UNLOCK) Faulty driver's door lock actuator An open or high resistance in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B32	PNK	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 tailgate release actuator should work.	Faulty tailgate release actuator relay circuit Faulty tailgate release actuator Poor ground (G505) 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
D22	GRN	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
D23	LT GRN	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
D24	BRN	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

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
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
D28	GRY	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	BRN	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 (G501) or an open in the ground wire An open or high resistance in the wire
C15	BRN	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 (G502) or an open in the ground wire An open or high resistance in the wire
C16	GRY	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	Tailgate open	Measure the voltage to ground:There should be less than 0.2 V.	Faulty power tailgate closer unit or faulty tailgate latch switch Poor ground (G505) or an open in the ground wire An open or high resistance in the wire
D27	WHT	Tailgate closed	Measure the voltage to ground:There should be battery voltage.	Faulty power tailgate closer unit or faulty tailgate latch switch A short to ground in the wire
C1	GRN	Shift lever in P position/mode	Measure the voltage to ground:There should be less than 0.2 V.	Faulty transmission range switch An open or high resistance in the wire
C1	GRN	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

Door Multiplex Control Unit

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

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

Power Window Master Switch 37P Connector (female terminals)

Courtesy of HONDA, U.S.A., INC.

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.

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	BLU	Disconnect these connectors: Front passenger's power window switch 37P connector Panoramic glass roof motor-control unit 14P connector* 1 Moonroof motor-control unit 14P connector* 2	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 panoramic glass roof motor-control unit 14P connector terminal No. 12: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

*1: With panoramic glass roof*2: With moonroof

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	LT GRN	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	An open or high resistance in the wire

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
4	WHT	Under all conditions	Measure the voltage to ground:There should be battery voltage.	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 (G401) 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 (G401) 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 (G401) or an open in the ground wire An open or high resistance in the wire
7	PUR	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 (G401) or an open in the ground wire An open or high resistance in the wire
8	RED	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	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
21	BLU	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

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
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
20	LT BLU	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. Turn the vehicle to the OFF (LOCK) mode, open and close the driver's door.

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

Front Passenger's Power Window Switch 37P Connector (female terminals)

Courtesy of HONDA, U.S.A., INC.

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.

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 these connectors: Power window master switch 37P connector Panoramic glass roof motor-control unit 14P connector* 1 Moonroof motor-control unit 14P connector* 2	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 panoramic glass roof motor-control unit 14P connector terminal No. 12: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

*1: With panoramic glass roof*2: With moonroof

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
1	GRN	Under all conditions	Measure the voltage to ground:There should be battery voltage.	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 (G401) An open or high resistance in the ground wire
36	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 (G401) or an open in the ground wire An open or high resistance in the wire
36	YEL	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

16. 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.