Keyless Access System (Keyless Access Control Unit, Keyless Access And Electric Steering Lock) Input Test (2014)

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 .
Before testing, make sure the No. A2-4 (40 A), No. A2-7 (30 A), No. A3-3 (30 A) and the No. A21 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B9 (20 A) and the No. B37 (7.5 A) fuses in the under-dash fuse/relay box are OK.
Before testing, make sure the No. C4 (10 A) fuse in the under-dash sub fuse box are OK.

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

2. Disconnect the keyless access control unit connectors

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
C3	YEL	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	YEL	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
B28	YEL	Connect terminals B14 and C11 with a jumper wire, and connect terminal C1 to ground with a jumper wire	Measure the voltage to ground: There should be battery voltage.	Blown No. B9 (20 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty under-dash sub relay box An open or high resistance in the wire
C12	PUR	Connect terminals B14 and C23 with a jumper wire, and connect terminal C1 to ground with a jumper wire	Measure the voltage to ground: There should be battery voltage.	Blown No. B37 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty under-dash sub relay box Faulty center junction box An open or high resistance in the wire
B12	BLU	Press and hold the power switch	Measure the voltage to ground: There should be battery voltage.	Blown No. C4 (10 A) fuse in the under-dash sub fuse box Faulty under-dash sub fuse box Faulty power switch An open or high resistance in the wire
B8	GRN	Press and hold the power switch	Check for continuity to ground: There should be continuity.	Poor ground (G501) or an open in the ground wire Faulty power switch An open or high resistance in the wire
B21	GRY	Jump the SCS line with the HDS, disconnect PCM connector A (49P)	Check for continuity between terminal B21 and PCM connector A (49P) terminal No. 21: 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 M (12P)	Check for continuity between terminal B21 and under-dash fuse/relay box connector M (12P) terminal No. 10: There should be continuity.	An open in the S-NET wire
		Disconnect the under-dash fuse/relay box connector M (12P)	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, then go to step 6.

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. C4 (10 A) fuse in the under-dash sub fuse box Faulty under-dash sub fuse box An open or high resistance in the wire
B14	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. A21 (10 A) fuse in the under-hood fuse/relay box Faulty under-hood fuse/relay box Faulty under-dash fuse/relay box Faulty center junction box Faulty driver's junction box An open or high resistance in the wire
A17	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G503) An open or high resistance in the ground wire
B15	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G503) An open or high resistance in the ground wire
C10	RED	Turn the vehicle to the ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. A2-7 (30 A) fuse in the under-hood fuse/relay box Faulty under-dash sub relay box An open or high resistance in the wire
C8	YEL	Turn the vehicle to the 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 sub relay box An open or high resistance in the wire
C22	BLK	Turn the vehicle to the ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. A2-7 (30 A) fuse in the under-hood fuse/relay box Faulty under-dash sub relay box An open or high resistance in the wire
A30	WHT	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
A30	WHT	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
A23	RED	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 (G503) or an open in the ground wire An open or high resistance in the wire
A23	RED	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
B19	LT GRN	Parking brake lever pulled	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	LT GRN	Parking brake lever released	Measure the voltage to ground: There should be about 5 V.	Faulty parking brake switch A short to ground in the wire
A9	YEL	Trunk lid outer handle button pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty trunk lid outer handle switch Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
A9	YEL	Trunk lid outer handle button released	Measure the voltage to ground: There should be about 5 V.	Faulty trunk lid outer handle switch A short to ground in the wire
B11	GRY	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	GRY	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	BRN	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	BRN	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 (G503) or an open in the ground wire An open or high resistance in the wire
B1	LT GRN	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. A10 (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	LT GRN	Brake pedal released	Measure the voltage to ground: There should be less than 0.2 V.	Faulty brake pedal position switch An open or high resistance in the wire
C7	BRN	Press and hold the power switch	Measure the voltage to ground: The voltage should be 5 V, then changes to 0 V and returns to 5 V.	Faulty electric steering lock control unit An open or high resistance in the wire A short to ground in the wire

Electric Steering Lock

NOTE:

SRS components are located in this area. Review the SRS component locations - Refer to: SRS Component Location Index (2014 2015), or SRS Component Location Index (2017) , 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.

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, 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	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. C4 (10 A) fuse in the under-dash sub fuse box An open or high resistance in the wire
12	YEL	Turn the vehicle to the ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. B9 (20 A) 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 (G501) An open or high resistance in the ground wire
8	BRN	Press and hold the power switch	Measure the voltage to ground: The voltage should be 5 V, then changes to 0 V and returns to 5 V.	Faulty keyless access control unit An open or high resistance in the wire A short to ground in the wire
5	ORN	Turn the vehicle to the 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.