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 Connectors Terminals
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 these input tests at the following connectors.

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.

CONTROL UNIT INPUT TEST REFERENCE

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 these input tests at the following connectors.

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.

CONTROL UNIT INPUT TEST REFERENCE

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) or an open in the ground wire An open or high resistance in the wire
B32	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) or an open in the ground wire An open or high resistance in the 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.	Poor ground (G501) or an open in the ground wire Faulty keyless access system mode switch 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.	Poor ground (G403) or an open in the ground wire Faulty remote slot 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.	Poor ground (G403) or an open in the ground wire Faulty remote slot An open or high resistance in the wire