Heated Steering Wheel Control Unit Input Test

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
SRS components are located in this area. Review the SRS component locations , and precautions and procedures before doing repairs or servicing.
Before testing, make sure the fuses associated with the system is OK.
After testing, clear the SRS control unit DTCs.

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

2. Do the 12 volt battery terminal disconnection procedure .

3. Remove the heated steering wheel control unit.

HEATED STEERING WHEEL CONTROL UNIT 14P CONNECTOR (female terminals)

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

4. 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 are OK, go to step 5.

5. 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 6.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
8	BLU	Disconnect the gauge control module 32P connector and the 12 volt battery sensor 2P connector	Check for continuity between terminal No. 8 and gauge control module 32P connector terminal No. 23: There should be continuity.	Faulty cable reel An open or high resistance in the wire
8	BLU		Check for continuity to ground:There should be no continuity.	Faulty cable reel A short to ground in the wire
7	GRN	Disconnect the steering wheel heater pad 4P connector	Check for continuity between terminal No. 7 and steering heater 4P connector terminal No. 4: There should be continuity.	An open or high resistance in the wire

6. 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, replace the heated steering wheel control unit .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
2	WHT	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Faulty heated steering wheel relay Faulty cable reel 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 (G401) Poor ground (G451) Faulty cable reel An open or high resistance in the ground wire
1	RED	Disconnect the steering wheel heater pad 4P connector, vehicle ON mode, and heated steering wheel switch ON	Measure the voltage to ground: There should be battery voltage.	A short to ground in the wire Poor connection Faulty heated steering wheel control unit
6	WHT	Disconnect the steering wheel heater pad 4P connector, vehicle ON mode, and heated steering wheel switch ON	Measure the voltage to ground: There should be 5 V.	A short to ground in the wire Poor connection Faulty heated steering wheel control unit
5*14	RED*PNK	Vehicle ON mode, and heated steering wheel switch pressed	Measure the voltage between terminals No. 5 and No. 14:There should be less than 0.2 V.	Faulty heated steering wheel switch An open or high resistance in the wire
5*14	RED*PNK	Vehicle ON mode, and heated steering wheel switch released	Measure the voltage between terminals No. 5 and No. 14:There should be battery voltage.	Faulty heated steering wheel switch A short to ground in the wire
10	PUR	Vehicle ON mode	Connect to ground with a jumper wire:The heated steering wheel switch indicator should come on.	Faulty heated steering wheel switch An open or high resistance in the ground wire