Keyless Access System (Keyless Access Control Unit, Keyless Access and Electric Steering Lock) Input Test

Keyless Access Control Unit

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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
Before testing, make sure the No. A2-3 (60 A), No. A3-3 (30 A), No. A3-4 (30 A), and No. A29 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B4 (15 A), No. B19 (7.5 A), and No. B31 (10 A) fuses in the under-dash fuse/relay box are OK.

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

2. Disconnect the following connectors.

Keyless access control unit connector A (32P)

Keyless access control unit connector B (28P)

Keyless access control unit connector C (24P)

NOTE: All connector views are shown from the wire side of the female terminals.

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

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, then go to step 5.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B20	LT BLU	Under all conditions	Check for continuity between terminal B20 and data link connector (DLC) terminal No. 7:There should be continuity.	An open or high resistance in the K LINE wire
B20	LT BLU	Under all conditions	Check for continuity between terminal B20 and body ground:There should be no continuity.	A short to ground in the K LINE wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
C3	GRY	Under all conditions	Check for continuity between terminal C3 and data link connector (DLC) terminal No. 15:There should be continuity.	An open or high resistance in the L-LINE wire
C3	GRY	Under all conditions	Check for continuity between terminal C3 and body ground:There should be no continuity.	A short to ground in the L-LINE wire
B12	PUR	Press the engine start/stop switch	Measure the voltage to ground:There should be battery voltage.	Blown No. B31 (10 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty engine start/stop switch An open or high resistance in the wire
B8	BRN	Press the engine start/stop switch	Check for continuity to ground:There should be continuity.	Poor ground (G502) or an open in the ground wire Faulty engine start/stop switch An open or high resistance in the wire
B21	YEL	Jump the SCS line with the HDS, and wait more than 1 minute, disconnect the PCM connector A (51P)	Check for continuity between terminal B21 and PCM connector A (51P) terminal No. 21:There should be continuity.	An open in the S-NET wire PCM
		Disconnect the under-dash fuse/relay box connector P (20P)	Check for continuity between terminal B21 and under-dash fuse/relay box connector P (20P) terminal No. 4:There should be continuity.	Faulty under-dash fuse/relay box An open in the S-NET wire
		Disconnect the under-dash fuse/relay box connector P (20P)	Check for continuity between terminal B21 and body ground:There should be no continuity.	A short to ground in the S-NET wire

5. 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, replace the keyless access control unit .^*1
If all the input tests prove OK, then go to step 6.^*2

*1: Without electric steering lock

*2: With electric steering lock

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A1	BLK	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. B31 (10 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
B14	RED	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. A29 (10 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire

*: With electric steering lock

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A17	BRN	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
B15	BRN	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
B28	BLU	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	Blown No. B4 (15 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty under-dash subrelay box An open or high resistance in the wire
C12	PUR	Vehicle ACC mode	Measure the voltage to ground:There should be battery voltage.	Blown No. B19 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty under-dash subrelay box An open or high resistance in the wire
C10	LT GRN	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	Blown No. A3-3 (30 A) fuse in the under-hood fuse/relay box Faulty under-dash subrelay box An open or high resistance in the wire
C8	GRN	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	Blown No. A3-4 (30 A) fuse in the under-hood fuse/relay box Faulty under-dash subrelay box An open or high resistance in the wire
C22	RED	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	Blown No. A3-3 (30 A) fuse in the under-hood fuse/relay box Faulty under-dash subrelay box An open or high resistance in the wire
A30	GRN	Driver's door outer handle lock switch 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
A30	GRN	Driver's door outer handle lock switch 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

*: With electric steering lock

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A23	GRY	Front passenger's door outer handle lock switch pushed	Measure the voltage to ground:There should be less than 0.2 V.	Faulty front passenger's door outer handle Poor ground (G503) or an open in the ground wire An open or high resistance in the wire
A23	GRY	Front passenger's door outer handle lock switch 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
B19	BLU	Parking brake pedal pressed	Measure the voltage to ground:There should be less than 0.2 V.	Faulty parking brake switch Faulty parking brake switch ground An open or high resistance in the wire
B19	BLU	Parking brake pedal released	Measure the voltage to ground:There should be about 5 V.	Faulty parking brake switch A short to ground in the wire
A9	LT GRN	Tailgate outer handle switch pushed	Measure the voltage to ground:There should be less than 0.2 V.	Faulty tailgate outer handle/lock switch Poor ground (G603) or an open in the ground wire^1 Power tailgate control unit^2 An open or high resistance in the wire
A9	LT GRN	Tailgate outer handle switch released	Measure the voltage to ground:There should be about 5 V.	Faulty tailgate outer handle/lock switch A short to ground in the wire
B11	LT GRN	Shift lever in P position	Measure the voltage to ground:There should be less than 0.2 V.	Faulty transmission range switch Poor ground (G101) or an open in the ground wire An open or high resistance in the wire
B11	LT GRN	Shift lever in any position other than P	Measure the voltage to ground:There should be about 5 V.	Faulty transmission range switch A short to ground in the wire
B10	LT BLU	Shift lever in P position	Measure the voltage to ground:There should be about 5 V.	Faulty park pin switch A short to ground in the wire
B10	LT BLU	Shift lever in any position other 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

*: With electric steering lock

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B1	YEL	Brake pedal pressed	Measure the voltage to ground:There should be battery voltage.	Blown No. A16 (10 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box Faulty brake pedal position switch An open or high resistance in the wire A short to ground in the wire
B1	YEL	Brake pedal released	Measure the voltage to ground:There should be less than 0.2 V.	Faulty brake pedal position switch A short in the wire
C7^*	PNK	Electric steering lock (LOCK)	Measure the voltage to ground:There should be about 5 V.	Faulty electric steering lock control unit A short to ground in the wire
C7^*	PNK	Electric steering lock (UNLOCK)	Measure the voltage to ground:There should be less than 0.2 V.	Faulty electric steering lock control unit An open or high resistance in the wire

*: With electric steering lock

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.

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

7. Disconnect the following connector.

Electric steering lock 12P connector

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

8. 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.

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	BLK	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. B31 (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. B4 (15 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty under-dash subrelay box An open or high resistance in the wire
7	BRN	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
8	PNK	Electric steering lock (LOCK)	Measure the voltage to ground:There should be about 5 V.	Faulty keyless access control unit A short to ground in the wire An open or high resistance in the wire
8	PNK	Electric steering lock (UNLOCK)	Measure the voltage to ground:There should be less than 0.2 V.	Faulty electric steering lock
5	ORN	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage	Faulty keyless access control unit An open or high resistance in the wire A short to ground in the wire

10. If multiple failures are found on more than one control unit, replace the keyless access control unit . If input failures are related to a particular control unit, replace the control unit.