Reminder Systems (Body Control Module and Gauge Control Module) Input Test (5-door) (2017 2018 2019 2020 2021)

NOTE: 

• Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A .
• Before testing, do the gauge control module self-diagnostic function  to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line are OK.
• Before testing, make sure the No. A18 (10 A) fuse in the under-hood fuse/relay box is OK.
• Before testing, make sure the No. B7 (10 A) and No. B8 (15 A) *1/(20 A) *2 fuses in the under-dash fuse/relay box are OK.

*1: Except K20C1 engine

*2: K20C1 engine

Body Control Module 

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

2. Disconnect body control module connectors A, C, D, and E.

NOTE:  All connector views are shown from the wire side of the 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 are OK, go to step 4.

Reconnect the connectors to the body control module, and 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	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. A18 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire

*1: Except K20C1 engine

*2: K20C1 engine

*3: Without keyless access system

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
E1	BLU	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. B8 (15 A) *1/(20 A) *2 fuse in the under-dash fuse/relay box 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
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
D27	WHT	Tailgate open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty tailgate latch switch Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
		Tailgate closed	Measure the voltage to ground: There should be battery voltage.	Faulty tailgate latch switch A short to ground in the wire

*1: Except K20C1 engine

*2: K20C1 engine

*3: Without keyless access system

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D26 *3	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 Poor ground (G505) or an open in the ground wire An open or high resistance in the wire
		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
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
		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
		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	YEL*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
		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

*1: Except K20C1 engine

*2: K20C1 engine

*3: Without keyless access system

Gauge Control Module 

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

6. Disconnect gauge control module connector A (32P).

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 connector still disconnected, do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If the input tests prove OK, go to step 9.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A10	PNK	Disconnect the VSA modulator-control unit 46P connector	Check for continuity between terminal No. A10 and VSA modulator-control unit 46P connector terminal No. 16: There should be continuity.	An open or high resistance in the wire

Reconnect the connector, and 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.	Blown No. A18 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A17	BRN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. B7 (10 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
A4	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
A32	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

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 gauge control module .