Exterior Lights (Body Control Module and Relay Control Module) Input Test

NOTE:

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 .

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 C (28P) (female terminals): Body Control Module Connector E (24P) (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 are OK, go to step 4.

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 5.

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 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
C10*C3	PNK*BLK	Combination light switch OFF	Measure the voltage between terminals C10 and C3:There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
C10*C3	PNK*BLK	Combination light switch in any position other than OFF	Measure the voltage between terminals C10 and C3:There should be battery voltage.	Faulty combination light switch A short to ground in the wire
C11*C3	GRY*BLK	Combination light switch (PARKING position) ON	Measure the voltage between terminals C11 and C3:There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
C11*C3	GRY*BLK	Combination light switch OFF	Measure the voltage between terminals C11 and C3:There should be battery voltage.	Faulty combination light switch A short to ground in the wire
C9*C3	PNK*BLK	Combination light switch (headlight) ON	Measure the voltage between terminals C9 and C3:There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
C9*C3	PNK*BLK	Combination light switch OFF	Measure the voltage between terminals C9 and C3:There should be battery voltage.	Faulty combination light switch A short to ground in the wire
C7*C3	GRN*BLK	Combination light switch lever pulled (Passing)	Measure the voltage between terminals C7 and C3:There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
C7*C3	GRN*BLK	Combination light switch lever released (OFF)	Measure the voltage between terminals C7 and C3:There should be battery voltage.	Faulty combination light switch A short to ground in the wire

*: With front fog light

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
C8*C3	LT BLU*BLK	Combination light switch (Dimmer) in high beam position	Measure the voltage between terminals C8 and C3:There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
C8*C3	LT BLU*BLK	Combination light switch (Dimmer) in low beam position	Measure the voltage between terminals C8 and C3:There should be battery voltage.	Faulty combination light switch A short to ground in the wire
C6**C3	PUR*BLK	Front fog light switch ON	Measure the voltage between terminals C6 and C3:There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
C6**C3	PUR*BLK	Front fog light switch OFF	Measure the voltage between terminals C6 and C3:There should be battery voltage.	Faulty combination light switch A short to ground in the wire

*: With front fog light

Relay Control Module

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

6. Disconnect relay control module connectors.

Relay Control Module Connector A (6P) (female terminals): Relay Control Module Connector B (10P) (female terminals): Relay Control Module Connector C (18P) (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 are OK, go to step 8.

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 9.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B4*B8	ORN*PUR	Under all conditions	Connect terminal B4 and B8 with a jumper wire:The left headlight (low beam) should come on.	Blown bulb or faulty LED Poor ground (G351) or an open in the ground wire An open or high resistance in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
C5*C11	RED*GRN	Under all conditions	Connect terminal C5 and C11 with a jumper wire:The right headlight (low beam) should come on.	Blown bulb or faulty LED Poor ground (G251) or an open in the ground wire An open or high resistance in the wire
B4*B5	ORN*BRN	Under all conditions	Connect terminal B4 and B5 with a jumper wire:The left headlight (high beam) should come on.	Blown bulb or faulty LED Poor ground (G351) or an open in the ground wire An open or high resistance in the wire
C5*C3	RED*GRY	Under all conditions	Connect terminal C5 and C3 with a jumper wire:The right headlight (high beam) should come on.	Blown bulb or faulty LED Poor ground (G251) or an open in the ground wire An open or high resistance in the wire
C5*C1	RED*PUR	Under all conditions	Connect terminal C5 and C1 with a jumper wire:The left front parking light, left taillight, left inner taillight, and license plate lights should come on.	Faulty LED Poor ground (G351, G505) or an open in the ground wire An open or high resistance in the wire
B4*B10	ORN*RED	Under all conditions	Connect terminal B4 and B10 with a jumper wire:The right front parking light, right taillight, and right inner taillight should come on.	Faulty LED Poor ground (G251, G504) or an open in the ground wire An open or high resistance in the wire
C5*C8	RED*YEL	Under all conditions	Connect terminal C5 and C8 with a jumper wire:The left daytime running light should come on.	Faulty LED Poor ground (G351) or an open in the ground wire An open or high resistance in the wire
B4*B3	ORN*PNK	Under all conditions	Connect terminal B4 and B3 with a jumper wire:The right daytime running light should come on.	Faulty LED Poor ground (G251) or an open in the ground wire An open or high resistance in the wire
C4	YEL	Under all conditions	Connect terminal to ground with a jumper wire:The front fog lights should come on.	Faulty front fog light relay Blown bulb Poor ground (G251) or an open in the ground wire An open or high resistance in the wire

Reconnect the connectors to the relay 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 10.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A1	RED	Under all conditions	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
A4	LT GRN	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	An open or high resistance in the wire
A6	BRN	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G251) An open or high resistance in the wire
C15	BRN	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G251) An open or high resistance in the ground wire
C10	PNK	Combination light switch (headlight) ON	Measure the voltage to ground:There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the ground wire
C10	PNK	Combination light switch OFF	Measure the voltage to ground:There should be battery voltage.	Faulty combination light switch A short to ground in the wire

10. 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.