DTC Troubleshooting: C0023-14 - Honda CR-V RW/RT 2017-2020

1.

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

?4.	Select the BRAKE LIGHT RELAY TEST in the VSA FUNCTION TEST with the HDS.

?5.

Check for DTCs with the HDS.

DTC Description	DTC	Freeze Frame
C0023-14 Brake Diag Circuit OFF Failure

Is DTC C0023-14 indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?

2.

Relay circuit board check:

Relay circuit board check

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

?2.	Substitute a known-good relay circuit board.

?3.	Turn the vehicle to the ON mode.

?4.	Clear the DTC with the HDS.

?5.	Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

?6.	Select the BRAKE LIGHT RELAY TEST in the VSA FUNCTION TEST with the HDS.

?7.

Check for DTCs with the HDS.

DTC Description	DTC	Freeze Frame
C0023-14 Brake Diag Circuit OFF Failure

Is DTC C0023-14 indicated?


	YES

Go to step 3.


	NO

Replace the original relay circuit board.?

3.

Open wire check (BRK LAMP line) 1:

Open wire check (BRK LAMP line) 1

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

?2.

Disconnect the following connector.

VSA modulator-control unit 46P connector

?3.

Connect terminals 1 and 2 with a jumper wire.

Terminal 1	VSA modulator-control unit 46P connector No. 11
Terminal 2	Body ground

?4.	Turn the vehicle to the ON mode.

?5.	Check the brake lights without pressing the brake pedal.

Are the brake lights on?


	YES

Go to step 7.


	NO

Go to step 4.

4.

Open wire check (BRK LAMP line) 2:

Open wire check (BRK LAMP line) 2

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

?2.	Disconnect the jumper wire.

?3.

Disconnect the following connector.

Relay circuit board connector B (6P)

?4.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	VSA modulator-control unit 46P connector: disconnected
	Relay circuit board connector B (6P): disconnected
Test point 1	VSA modulator-control unit 46P connector No. 11
Test point 2	Relay circuit board connector B (6P) (female terminals) No. 1:

Is there continuity?


	YES

The BRK LAMP wire is OK. Go to step 5.


	NO

Repair an open in the wire between the VSA modulator-control unit and the relay circuit board.?

5.

Open wire check (IG1 OPTION line):

Open wire check (IG1 OPTION line)

?1.	Turn the vehicle to the ON mode.

?2.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	VSA modulator-control unit 46P connector: disconnected
	Relay circuit board connector B (6P): disconnected
Test point 1	Relay circuit board connector B (6P) (female terminals) No. 2:
Test point 2	Body ground

Is there battery voltage?


	YES

The IG1 OPTION wire is OK. Go to step 6.


	NO

Repair an open in the wire between the under-dash fuse/relay box and the relay circuit board.?

6.

Open wire check (+B STOP line):

Open wire check (+B STOP line)

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

?2.

Disconnect the following connector.

Relay circuit board connector C (18P)

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	VSA modulator-control unit 46P connector: disconnected
	Relay circuit board connector B (6P): disconnected
	Relay circuit board connector C (18P): disconnected
Test point 1	Relay circuit board connector C (18P) (female terminals) No. 4:
Test point 2	Body ground

Is there battery voltage?


	YES

The +B STOP wire is OK. Go to step 7.


	NO

Repair an open in the wire between the under-hood fuse/relay box and the relay circuit board.?

7.

Open wire check (BRK DIAG line):

Open wire check (BRK DIAG line)

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

?2.	Disconnect the jumper wire. (if connected)

?3.

Disconnect the following connector.

Relay circuit board connector A (8P)

?4.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Relay circuit board connector A (8P): disconnected
	Relay circuit board connector B (6P): disconnected (if disconnected)
	Relay circuit board connector C (18P): disconnected (if disconnected)
	VSA modulator-control unit 46P connector: disconnected
Test point 1	VSA modulator-control unit 46P connector No. 44
Test point 2	Relay circuit board connector A (8P) (female terminals) No. 6:

Is there continuity?


	YES

The BRK DIAG wire is OK. Check for loose terminals and poor connections in the VSA modulator-control unit 46P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit.?


	NO

Repair an open in the wire between the relay circuit board and the VSA modulator-control unit.?