Keyless Access System (Keyless Access Control Unit, Keyless Access Backup Control Unit, Keyless Access Power Control Unit, and Electric Steering Lock) Input Test (2013-15)

WARNING: This page is about a different car, the 2016 Acura RDX, 2015 Acura RDX, 2014 Acura RDX, and 2013 Acura RDX. However, it is still accessible from the selected car via links, so may be relevant.

Keyless Access Control Unit

NOTE: Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.

1. Press the engine start/stop button to select the OFF 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
B13	LT BLU	Under all conditions	Check for continuity between terminal B13 and data link connector (DLC) terminal No. 7:There should be continuity.	An open in the K-LINE wire
B13	LT BLU	Under all conditions	Check for continuity between terminal B13 and body ground:There should be no continuity.	A short to ground in the K-LINE wire
B6	ORN	Under all conditions	Check for continuity between terminal B6 and data link connector (DLC) terminal No. 9:There should be continuity.	An open or high resistance in the wire
B6	ORN	Under all conditions	Check for continuity between terminal B6 and body ground:There should be no continuity.	A short to ground in the wire
B28	LT GRN	Jump the SCS line with the HDS, disconnect PCM connector A (49P) and the backup control unit 40P connector	Check for continuity between terminal B28 and PCM connector A (49P) terminal No. 17:There should be continuity.	Faulty under-dash fuse/relay box An open in the S-NET wire
		Disconnect the backup control unit 40P connector and under-dash fuse/relay box connector P (20P)	Check for continuity between terminal B28 and backup control unit 40P connector terminal No. 7:There should be continuity.	An open in the S-NET wire
			Check for continuity between terminal B28 and under-dash fuse/relay box connector P (20P) terminal No. 4:There should be continuity.	An open in the S-NET wire
			Check for continuity between terminal B28 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
B16	GRN	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 An open or high resistance in the wire
B32	YEL	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Blown No. B4 (15 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
B7	PUR	Power mode ACC	Measure the voltage to ground:There should be battery voltage.	Blown No. B19 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
A19	BLK	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

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B17	BLK	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
B23	BRN	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
B23	BRN	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
B26	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 (G506) or an open in the ground wire An open or high resistance in the wire
B26	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
B25	LT 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
B25	LT 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
B21	PNK	Tailgate outer handle button pushed	Measure the voltage to ground:There should be less than 0.2 V.	Faulty tailgate outer handle switch Poor ground (G602) or an open in the ground wire An open or high resistance in the wire
B21	PNK	Tailgate outer handle button released	Measure the voltage to ground:There should be about 5 V.	Faulty tailgate outer handle switch A short to ground in the wire
C2	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
C2	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

Power Control Unit

NOTE: Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.

6. Press the engine start/stop button to select the OFF mode.

7. Disconnect the power control unit connectors .

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

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

8. 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 9.

9. 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 10.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
C34	ORN	Under all conditions	Check for continuity between terminal C34 and data link connector (DLC) terminal No. 9:There should be continuity.	An open in the SCS wire
C34	ORN	Under all conditions	Check for continuity to ground.There should be no continuity.	A short to ground in the SCS wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
C16	LT BLU	Under all conditions	Check for continuity between terminal C16 and data link connector (DLC) terminal No. 1:There should be continuity.	An open in the DIAG-H wire
C16	LT BLU	Under all conditions	Check for continuity to ground:There should be no continuity.	A short to ground in the DIAG-H wire

10.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, go to step 11.

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. A2-4 (50 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
C18	GRN	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
C35	LT BLU	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
C1	BLK	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
C19	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G506) An open or high resistance in the ground wire
C15	RED	Under all conditions	Connect to ground with a jumper wire:The engine start/stop switch light should come on.	Blown No. B31 (10 A) fuse in the under-dash fuse/relay box Faulty engine start/stop switch An open or high resistance in the wire
C14	BLU	Under all conditions	Connect to ground with a jumper wire:The engine start/stop switch indicator should come on.	Blown No. B31 (10 A) fuse in the under-dash fuse/relay box Faulty engine start/stop switch An open or high resistance in the wire
C36	LT GRN	Brake pedal pressed	Measure the voltage to ground:There should be battery voltage.	Blown No. A17 (10 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

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
C33	LT 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
C33	LT 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
C31	LT GRN	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 (G503) or an open in the ground wire An open or high resistance in the wire
C31	LT GRN	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
C30	PUR	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
C30	PUR	Shift lever out of P position	Measure the voltage to ground:There should be about 5 V.	Faulty transmission range switch A short to ground in the wire
B1	BLU	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Blown No. A2-4 (50 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
B2	RED	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Blown No. A2-4 (50 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
B4	ORN	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Blown No. A2-4 (50 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
C8	PNK	Power mode ACC	Measure the voltage to ground:There should be battery voltage.	A short to ground in the wire
C9	GRY	Power mode START	Measure the voltage to ground:There should be battery voltage.	Faulty PCM A short to ground in the wire
C6	PUR	Power mode ON	Measure the voltage to ground:There should be battery voltage.	A short to ground in the wire
C5	PNK	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Faulty MICU 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 , and precautions and procedures before doing repairs or servicing.
Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.

11.Press the engine start/stop button to select the OFF mode.12.Disconnect the electric steering lock 12P connector .

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

13.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, reconnect the connectors to electric steering lock, then go to step 14.

14.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 15.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
3	LT BLU	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. B31 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
12	YEL	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Blown No. B4 (15 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 (G502) An open or high resistance in the ground wire
8	WHT	Electric steering lock (LOCK)	Measure the voltage to ground:There should be about 5 V.	A short to ground in the wire
8	WHT	Electric steering lock (UNLOCK)	Measure the voltage to ground:There should be less than 0.2 V.	An open or high resistance in the wire
5	PUR	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Faulty power control unit An open or high resistance in the wire A short to ground in the wire

Backup Control Unit

NOTE: Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.

15.Press the engine start/stop button to select the OFF mode.16.Disconnect the backup control unit 40P connector .

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

17.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, reconnect the connectors, then go to step 18.

18.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 19.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
7	LT GRN	Disconnect the electric steering lock 12P connector and keyless access control unit connector B (32P)	Check for continuity between terminal No. 7 and under-dash fuse/relay box connector P (20P) terminal No. 4:There should be continuity.	An open in the S-NET wire
			Check for continuity between terminal No. 7 and keyless access control unit connector B (32P) terminal No. 28:There should be continuity.	An open in the S-NET wire
		Jump the SCS line with the HDS, disconnect PCM connector A (49P) and keyless access control unit connector B (32P)	Check for continuity between terminal No. 7 and PCM connector A (49P) terminal No. 17:There should be continuity.	Faulty under-dash fuse/relay box An open in the S-NET wire
			Check for continuity to ground:There should be no continuity.	A short to ground in the S-NET wire
27	LT BLU	Under all conditions	Check for continuity between terminal No. 27 and data link connector (DLC) terminal No. 7:There should be continuity.	An open in the K-LINE wire
27	LT BLU	Under all conditions	Check for continuity to 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
28	ORN	Under all conditions	Check for continuity between terminal No. 28 and data link connector (DLC) terminal No. 9:There should be continuity.	An open in the SCS wire
28	ORN	Under all conditions	Check for continuity to ground:There should be no continuity.	A short to ground in the SCS wire

19.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 20.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
20	GRN	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
19	LT BLU	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
40	YEL	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Blown No. B4 (15 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
39	PUR	Power mode ACC	Measure the voltage to ground:There should be battery voltage.	Blown No. B19 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
1	BLK	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
21	BLK	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
30	LT 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
30	LT 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

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
31	WHT	Electric steering lock (LOCK)	Check for continuity between terminal No. 31 and electric steering lock 12P connector terminal No. 8:There should be continuity.	Faulty electric steering lock control unit A short to ground in the wire
31	WHT	Electric steering lock (UNLOCK)	Check for continuity between terminal No. 31 and keyless access control unit connector C (5P) terminal No. 2:There should be continuity.	Faulty electric steering lock control unit An open or high resistance in the wire

20.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.