Keyless Access Control Unit

NOTE:

Before doing the input tests, check the B- CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B- CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B- CAN SYSTEM DIAGNOSIS TEST MODE A ).

Press the engine start/stop button to select the OFF mode.
Remove the driver's dashboard undercover (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
Disconnect the connectors (A) from the keyless access control unit (B).
NOTE: All connector views are wire side of female terminals.

Fig 1: Identifying Keyless Access Control Unit And Connectors
Courtesy of AMERICAN HONDA MOTOR CO., 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, go to step 5.

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 6.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B4	LT BLU	Under all conditions	Check for continuity between terminal B4 and data link connector (DLC) terminal No. 7: There should be continuity.	An open in the K- LINE wire
B4	LT BLU	Under all conditions	Check for continuity between terminal B4 and body ground: There should be no continuity.	A short to ground in the wire
B11	ORN	Under all conditions	Check for continuity between terminal B11 and data link connector (DLC) terminal No. 9: There should be continuity.	An open or high resistance in the wire
B11	ORN	Under all conditions	Check for continuity between terminal B11 and body ground: There should be no continuity.	A short to ground in the wire
B21	LT GRN	Disconnect the remote slot control unit 40P connector and driver's under- dash fuse/relay box connector Q (20P). Jump the SCS line with the HDS, disconnect ECM/PCM connector A (49P)	Check for continuity between terminal B21 and remote slot control unit 40P connector terminal No. 14: There should be continuity.	An open in the S- NET wire
			Check for continuity between terminal B21 and driver's under- dash fuse/relay box connector Q (20P) terminal No. 15: There should be continuity.
			Check for continuity between terminal B21 and ECM/PCM connector A (49P) terminal No. 46: There should be continuity.
			Check for continuity between terminal B21 and body ground: There should be no continuity.	A short to ground in the wire
B27	RED	Disconnect the remote slot control unit 40P connector and the remote slot 16P connector	Check for continuity between terminal B27 and remote slot control unit 40P connector terminal No. 27: There should be continuity.	An open or high resistance in the wire
			Check for continuity between terminal B27 and remote slot 16P connector terminal No. 14: There should be continuity.	An open or high resistance in the wire
			Check for continuity between terminal B27 and body ground: There should be no continuity.	A short to ground in the wire

Reconnect the connectors to the keyless access control unit, 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 7.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B1	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 15 (10 A) fuse in the under- hood fuse/relay box An open or high resistance in the wire
B10	PUR	Power mode ACC	Measure the voltage to ground: There should be battery voltage.	Blown No. 18 (7.5 A) fuse in the driver's under- dash fuse/relay box An open or high resistance in the wire
B17	YEL	Power mode ON	Measure the voltage to ground: There should be battery voltage.	Blown No. 9 (20 A) fuse in the driver's under- dash fuse/relay box An open or high resistance in the wire
A36	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) An open or high resistance in the ground wire
B32	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) An open or high resistance in the ground wire
C4	WHT	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
C4	WHT	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
B19	GRY	Keyless access system mode switch OFF	Measure the voltage to ground: There should be less than 0.2 V.	Faulty keyless access system mode switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
B19	GRY	Keyless access system mode switch ON	Measure the voltage to ground: There should be battery voltage.	Faulty keyless access system mode switch A short to ground in the wire
B23	YEL	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 (G405) or an open in the ground wire An open or high resistance in the wire
B23	YEL	Front passenger's door outer handle lock switch released	Measure the voltage to ground: There should be battery voltage.	Faulty front passenger's door outer handle A short to ground in the wire
B26	GRY	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 (G401) or an open in the ground wire An open or high resistance in the wire
B26	GRY	Driver's door outer handle lock switch released	Measure the voltage to ground: There should be battery voltage.	Faulty driver's door outer handle A short to ground in the wire
B24	LT GRN	Power mode ON, parking brake lever pulled	Measure the voltage to ground: There should be less than 0.2 V.	Faulty parking brake switch An open or high resistance in the wire
B24	LT GRN	Power mode ON, 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
B28	BRN	Trunk lid spoiler switch pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's under- dash fuse/relay box Faulty trunk lid spoiler switch Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
B28	BRN	Trunk lid spoiler switch released	Measure the voltage to ground: There should be about 5 V.	Faulty driver's under- dash fuse/relay box Faulty trunk lid spoiler switch A short to ground in the wire
A33	YEL	Insert the remote into the remote slot	Measure the voltage to ground: There should be less than 0.2 V.	Faulty remote slot Poor ground (G403) or an open in the ground wire An open or high resistance in the wire
B16	PNK	Insert the remote into the remote slot	Measure the voltage to ground: There should be less than 0.2 V.	Faulty remote slot Poor ground (G403) or an open in the ground wire An open or high resistance in the wire

Power Control Unit

Press the engine start/stop button to select the OFF mode.
Remove the driver's dashboard undercover (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
Disconnect the connectors (A) from the power control unit (B).
NOTE: All connector views are wire side of female terminals.

Fig 2: Identifying Power Control Unit And Connectors
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Inspect the connector and the 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 11.

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 12.

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. 1: There should be continuity.	An open in the DIAG- H 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 wire

Reconnect the connectors to the power control unit, 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 13.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A1	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 3- 1 (IG MAIN) (50 A) fuse in the under- hood fuse/relay box An open or high resistance in the wire
C1	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 15 (10 A) fuse in the under- hood fuse/relay box An open or high resistance in the wire
C20	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 12 (10 A) fuse in the passenger's under- dash fuse/relay box An open or high resistance in the wire
C18	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) An open or high resistance in the ground wire
C36	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) An open or high resistance in the ground wire
C11	BRN	Power mode ACC	Measure the voltage to ground: There should be battery voltage.	Faulty power control unit Faulty driver's under- dash fuse/relay box A short to ground in the wire
C10	LT GRN	Power mode START	Measure the voltage to ground: There should be battery voltage.	Faulty ECM/PCM Faulty power control unit A short to ground in the wire
C4	BRN	Under all conditions	Connect to ground with a jumper wire: The engine start/stop switch light should come on.	Blown No. 12 (10 A) fuse in the passenger's under- dash fuse/relay box Faulty engine start/stop switch An open or high resistance in the wire
C5	YEL	Under all conditions	Connect to ground with a jumper wire: The engine start/stop switch indicator should come on.	Blown No. 12 (10 A) fuse in the passenger's under- dash fuse/relay box Faulty engine start/stop switch An open or high resistance in the wire
C13	PUR	Power mode ON	Measure the voltage to ground: There should be battery voltage.	Power control unit A short to ground in the wire
C14	BRN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Faulty driver's MICU An open or high resistance in the wire A short to ground in the wire
C19	LT GRN	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. 10 (20 A) fuse in the under- hood fuse/relay box Faulty brake pedal position switch An open or high resistance in the wire A short to ground in the wire
C22	LT GRN	Power mode ON, parking brake lever pulled	Measure the voltage to ground: There should be less than 0.2 V.	Faulty parking brake switch An open or high resistance in the wire
C22	LT GRN	Power mode ON, 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
C23	GRY	Keyless access system mode switch OFF	Measure the voltage to ground: There should be less than 0.2 V.	Faulty keyless access system mode switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
C23	GRY	Keyless access system mode switch ON	Measure the voltage to ground: There should be battery voltage.	Faulty keyless access system mode switch A short to ground in the wire
C24 (A/T)	PUR	Shift lever out of P position	Measure the voltage to ground: There should be less than 0.2 V.	Faulty park pin switch Poor ground (G403) or an open in the ground wire An open or high resistance in the wire
C24 (A/T)	PUR	Shift lever in P position	Measure the voltage to ground: There should be battery voltage.	Faulty park pin switch A short to ground in the wire
C25 (A/T)	RED	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
C25 (A/T)	RED	Shift lever out of P position	Measure the voltage to ground: There should be battery voltage.	Faulty transmission range switch A short to ground in the wire
C26	YEL	Insert the remote into the remote slot	Measure the voltage to ground: There should be less than 0.2 V.	Faulty remote slot Poor ground (G403) or an open in the ground wire An open or high resistance in the wire
C27	PNK	Insert the remote into the remote slot	Measure the voltage to ground: There should be less than 0.2 V.	Faulty remote slot Poor ground (G403) or an open in the ground wire An open or high resistance in the wire
C28 (M/T)	PNK	Power mode ON, clutch pedal pressed.	Measure the voltage to ground: There should be less than 0.2 V.	Faulty clutch pedal position switch A Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
C28 (M/T)	PNK	Power mode ON, 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

Electric Steering Lock

NOTE: SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing.

Press the engine start/stop button to select the OFF mode.
Remove the column covers (see SIDE DEFOGGER VENT TRIM REMOVAL/INSTALLATION ).
Disconnect the connector (A) from the electric steering lock (B).

Fig 3: Identifying Electric Steering Lock And Connectors
Courtesy of AMERICAN HONDA MOTOR CO., 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, go to step 17.

Reconnect the connector to the electric steering lock, 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 18.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
4	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 12 (10 A) fuse in the passenger's under- dash fuse/relay box An open or high resistance in the wire
7	YEL	Power mode ON	Measure the voltage to ground: There should be battery voltage.	Blown No. 9 (20 A) fuse in the driver's under- dash fuse/relay box An open or high resistance in the wire
12	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G405) An open or high resistance in the ground wire
11	WHT	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
11	WHT	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

Remote Slot Control Unit

Press the engine start/stop button to select the OFF mode.
Remove the glove box (see GLOVE BOX REMOVAL/INSTALLATION ).
Disconnect the connector (A) from the remote slot control unit (B).

Fig 4: Identifying Remote Slot Control Unit And Connectors
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Inspect the connector and the 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 22.

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 all the input tests prove OK, go to step 23.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
27	RED	Disconnect the remote slot 16P connector and keyless access control unit connector B (32P)	Check for continuity between terminal No. 27 and remote slot 16P connector terminal No. 14: There should be continuity.	An open or high resistance in the wire
			Check for continuity between terminal No. 27 and keyless access control unit connector B (32P) terminal No. 27: There should be continuity.	An open or high resistance in the wire
			Check for continuity between terminal No. 27 and body ground: There should be no continuity.	A short to ground in the wire

Reconnect the connector to the remote slot control unit, 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 24.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
1	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 15 (10 A) fuse in the under- hood fuse/relay box An open or high resistance in the wire
2	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 12 (10 A) fuse in the passenger's under- dash fuse/relay box An open or high resistance in the wire
21	YEL	Power mode ON	Measure the voltage to ground: There should be battery voltage.	Blown No. 9 (20 A) fuse in the driver's under- dash fuse/relay box An open or high resistance in the wire
22	PUR	Power mode ACC	Measure the voltage to ground: There should be battery voltage.	Blown No. 18 (7.5 A) fuse in the driver's under- dash fuse/relay box An open or high resistance in the wire
20	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G405) An open or high resistance in the ground wire
40	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G405) An open or high resistance in the ground wire
7	PNK	Insert the remote into the remote slot	Measure the voltage to ground: There should be less than 0.2 V.	Faulty remote slot Poor ground (G403) or an open in the ground wire An open or high resistance in the wire
26	YEL	Insert the remote into the remote slot	Measure the voltage to ground: There should be less than 0.2 V.	Faulty remote slot Poor ground (G403) or an open in the ground wire An open or high resistance in the wire
30	WHT	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
30	WHT	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
31	LT GRN	Power mode ON, parking brake lever pulled	Measure the voltage to ground: There should be less than 0.2 V.	Faulty parking brake switch An open or high resistance in the wire
31	LT GRN	Power mode ON, 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

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.