Precision All Wheel Steer Symptom Troubleshooting - Precision all wheel steer system indicator does not go off, and no DTCs are stored (2014 2015 2016 2017)

All DTCs check except precision all wheel steer system
-1. Turn the vehicle to the ON mode.

-2. Do the All DTCs check with the HDS.

All DTCs

Are there DTCs indicated?

YES

Do the DTC troubleshooting.

NO

Go to step 2.

Fuse check

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

-2. Check the following fuse.

Fuse	No. D24 (7.5 A)
Location	Driver's under-dash fuse/relay box

Is the fuse OK?

YES

The fuse is OK. Reinstall the fuse, then go to step 3.

Replace the fuse. Turn the vehicle to the ON mode, then the OFF (LOCK). If the fuse blows again, repair the short to ground on the No. D24 (7.5 A) fuse circuit.

Gauge control module operation check
-1. Do the gauge control module self-diagnostic function .

Is the gauge control module OK?

YES

Go to step 4.

NO

Replace the gauge control module .

Open wire check (IG1 DR2 line)

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

-2. Disconnect the following connector.

Precision all wheel steer control unit connector A (16P)

-3. Turn the vehicle to the ON mode.

-4. Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Precision all wheel steer control unit connector A (16P): disconnected
Test circuit	IG1 DR2
Test point 1	Precision all wheel steer control unit connector A (16P) No. 15 (WHT)
Test point 2	Body ground

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

Is there battery voltage?

YES

The IG1 DR2 wire is OK. Go to step 5.

Repair an open in the wire between the No. D24 (7.5 A) fuse in the driver's under-dash fuse/relay box and the precision all wheel steer control unit.

Open wire check (GND lines)

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

-2. Reconnect the following connector.

Precision all wheel steer control unit connector A (16P)

-3. Turn the vehicle to the ON mode.

-4. Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
Test circuit	GND
Test point 1	Precision all wheel steer control unit connector B (5P) No. 1 (BLK)
Test point 2	Body ground

Test circuit	GND
Test point 1	Precision all wheel steer control unit connector B (5P) No. 3 (BLK)
Test point 2	Body ground

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

Is there 0.1 V or more?

YES

Repair an open or high resistance in the wire between the electric parking brake control unit and body ground (G705) or loosen the ground bolt.

The GND wires are OK. Go to step 6.

F-CAN circuit communication check
-1. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

F-CAN Bus Connected Unit Check

Which result is indicated?

Gauge control module is Not Available

Go to step 7.

Precision all wheel steer control unit is Not Available

Go to step 8.

Precision all wheel steer control unit and gauge control module are Detected

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

Open wire check (F-CAN A_L, F-CAN A_H lines)

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

-2. Disconnect the following connectors.

CAN gateway 24P connector

Gauge control module connector A (32P)

-3. Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 24P connector: disconnected
	Gauge control module connector A (32P): disconnected
Test circuit	F-CAN A_L
Test point 1	CAN gateway 24P connector No. 15 (PNK)
Test point 2	Gauge control module connector A (32P) No. 28 (PNK)

Test circuit	F-CAN A_H
Test point 1	CAN gateway 24P connector No. 14 (BLU)
Test point 2	Gauge control module connector A (32P) No. 27 (BLU)

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

Is there continuity?

YES

Check for loose terminals in the CAN gateway 24P connector and gauge control module connector A (32P). If they are OK, substitute a known-good gauge control module , then retest. If the indicator come on then go off after substitution, replace the original gauge control module .

Repair an open in the wire between the gauge control module and the CAN gateway.

Open wire check (F-CAN C_L, F-CAN C_H lines)

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

-2. Disconnect the following connectors.

CAN gateway 24P connector

Precision all wheel steer control unit connector A (16P)

-3. Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 24P connector: disconnected
	Precision all wheel steer control unit connector A (16P): disconnected
Test circuit	F-CAN C_L
Test point 1	CAN gateway 24P connector No. 8 (PNK)
Test point 2	Precision all wheel steer control unit connector A (16P) No. 14 (PNK)

Test circuit	F-CAN C_H
Test point 1	CAN gateway 24P connector No. 9 (PUR)
Test point 2	Precision all wheel steer control unit connector A (16P) No. 6 (PUR)

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

Is there continuity?

YES

Check for loose terminals and poor connections at the precision all wheel steer control unit and the CAN gateway. If necessary, substitute a known-good precision all wheel steer control unit , and recheck.

Repair an open in the wire between the CAN gateway and the precision all wheel steer control unit.