Keyless Access System (Body Control Module and Electric Steering Lock) Input Test (5-door) (2017 2018 2019 2020 2021)

NOTE:

Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
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. A1-5 (30 A), No. A2-2 (30 A), and No. A18 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B8 (15 A) *1/(20 A) *2 and No. B30 (10 A) fuses in the under-dash fuse/relay box are OK.

*1: Except K20C1 engine

*2: K20C1 engine

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

2. Disconnect the body control module connectors.

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 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, then go to step 5.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D36	LT BLU	Under all conditions	Check for continuity between terminal D36 and data link connector (DLC) terminal No. 7: There should be continuity.	An open or high resistance in the K LINE wire
D36	LT BLU	Under all conditions	Check for continuity between terminal D36 and body ground: There should be no continuity.	A short to ground in the K LINE wire
F21	YEL	Under all conditions	Check for continuity between terminal F21 and data link connector (DLC) terminal No. 15: There should be continuity.	An open or high resistance in the L-LINE wire
F21	YEL	Under all conditions	Check for continuity between terminal F21 and body ground: There should be no continuity.	A short to ground in the L-LINE wire
G18	WHT	Press the engine start/stop switch button	Measure the voltage to ground: There should be battery voltage.	Blown No. B30 (10 A) fuse in the under-dash fuse/relay box Faulty engine start/stop switch An open or high resistance in the wire
G9	BLK	Press the engine start/stop switch button	Check for continuity to ground: There should be continuity.	Faulty engine start/stop switch Poor ground (G503) or an open in the ground wire An open or high resistance in the wire
D35	RED	Jump the SCS line with the HDS, disconnect PCM connector A (50P)	Check for continuity between terminal D35 and PCM connector A (50P) terminal No. 40: There should be continuity.	An open in the S-NET wire PCM
D35	RED		Check for continuity between terminal D5 and body ground: There should be no continuity.	A short to ground in the S-NET wire

Reconnect the connectors, 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, then go to step 6.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B16	YEL	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. B30 (10 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
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
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

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
G27	RED	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. A2-2 (30 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
E1	BLU	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. B8 (15 A) 4/(20 A) 5 fuse in the under-dash fuse/relay box An open or high resistance in the wire
G10	YEL	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. A1-5 (30 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
G11	LT BLU	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. A1-5 (30 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
G19	YEL	Driver's door outer handle lock button pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door outer handle Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
G19	YEL	Driver's door outer handle lock button released	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door outer handle A short to ground in the wire
G1	LT GRN	Front passenger's door outer handle lock button pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty front passenger's door outer handle Poor ground (G505) or an open in the ground wire An open or high resistance in the wire
G1	LT GRN	Front passenger's door outer handle lock button released	Measure the voltage to ground: There should be about 5 V.	Faulty front passenger's door outer handle A short to ground in the wire
G23	BRN	Electric parking brake switch applied	Measure the voltage to ground: There should be less than 0.2 V.	Faulty electric parking brake switch Poor ground (G502) or an open in the ground wire An open or high resistance in the wire
G23	BRN	Brake pedal pressed and electric parking brake switch released	Measure the voltage to ground: There should be about 5 V.	Faulty electric parking brake switch A short to ground in the wire
C4	WHT	Tailgate outer handle switch pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty tailgate outer handle switch Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
C4	WHT	Tailgate outer handle switch released	Measure the voltage to ground: There should be about 5 V.	Faulty tailgate outer handle switch A short to ground in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
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
C1 *1	GRN	Shift lever in any other position/mode other than P	Measure the voltage to ground: There should be battery voltage.	Faulty transmission range switch A short to ground in the wire
C26 *1	LT BLU	Shift lever in P position/mode	Measure the voltage to ground: There should be battery voltage.	Faulty park pin switch A short to ground in the wire
C26 *1	LT BLU	Shift lever in any other position/mode than P	Measure the voltage to ground: There should be less than 0.2 V.	Faulty park pin switch Poor ground (G502) or an open in the ground wire An open or high resistance in the wire
C26 *2	YEL	Clutch pedal released	Measure the voltage to ground: There should be battery voltage.	Faulty clutch pedal position switch A A short to ground in the wire
C26 *2	YEL	Clutch pedal pressed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty clutch pedal position switch A Poor ground (G302) or an open in the ground wire An open or high resistance in the wire
C25	GRY	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. A8 (10 A) fuse in the under-hood fuse/relay box Faulty brake pedal position switch An open or high resistance in the wire
G3 *3	PUR	Electric steering lock (LOCK)	Measure the voltage to ground: There should be about 5 V.	Faulty electric steering lock A short to ground in the wire
G3 *3	PUR	Electric steering lock (UNLOCK)	Measure the voltage to ground: There should be less than 0.2 V.	Faulty electric steering lock An open or high resistance in the wire
G21	WHT	Tailgate lock button pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty tailgate outer handle Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
G21	WHT	Tailgate lock button released	Measure the voltage to ground: There should be about 5 V.	Faulty tailgate outer handle A short to ground in the wire

*1: CVT

*2: M/T

*3: With electric steering lock

*4: Except K20C1 engine

*5: K20C1 engine

Electric Steering Lock

NOTE:

SRS components are located in this area. Review the SRS component locations , and precautions and procedures before doing repairs or servicing.
Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.

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

7. Disconnect the electric steering lock 12P connector.

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, then go to step 9.

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
3	YEL	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. B30 (10 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
12	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
7	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
8	PUR	Electric steering lock (LOCK)	Measure the voltage to ground: There should be about 5 V.	Faulty body control module A short to ground in the wire
8	PUR	Electric steering lock (UNLOCK)	Measure the voltage to ground: There should be less than 0.2 V.	Faulty electric steering lock An open or high resistance in the wire
5	YEL	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Faulty body control module An open or high resistance in the wire A short to ground in the wire

*1: Except K20C1 engine

*2: K20C1 engine

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.