DTC Troubleshooting: C1270-15 - 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.

Check for DTCs with the HDS.

DTC Description	DTC	Freeze Frame
C1270-15 Automatic Brake Hold Switch Signal Circuit Open

Is DTC C1270-15 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.

Automatic brake hold switch check:

Automatic brake hold switch check

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

?2.	Check the automatic brake hold switch.

Is the automatic brake hold switch OK?


	YES

Go to step 3.


	NO

Replace the electric parking brake/automatic brake hold switch.?

3.

Open wire check (BRAKE HOLD line) 1:

Open wire check (BRAKE HOLD line) 1

?1.

Disconnect the following connector.

Electric parking brake/automatic brake hold switch 12P connector

?2.	Turn the vehicle to the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Electric parking brake/automatic brake hold switch 12P connector: disconnected
Test point 1	Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 7:
Test point 2	Body ground

Is there about 5 V?


	YES

The BRAKE HOLD wire is OK. Go to step 4.


	NO

Go to step 5.


	NO

Go to step 6.

4.

Open wire check (GND line):

Open wire check (GND line)

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

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Electric parking brake/automatic brake hold switch 12P connector: disconnected
Test point 1	Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 8:
Test point 2	Body ground

Is there continuity?


	YES

The GND wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good gauge control module, then recheck. If the symptom/indication goes away with a known-good gauge control module, replace the original gauge control module.?


	NO

Repair an open in the wire between the electric parking brake/automatic brake hold switch and body ground (G402).?

5.

Shorted wire check (BRAKE HOLD line to power):

Shorted wire check (BRAKE HOLD line to power)

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

?2.

Disconnect the following connector.

Gauge control module connector A (32P)

?3.	Turn the vehicle to the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Electric parking brake/automatic brake hold switch 12P connector: disconnected
	Gauge control module connector A (32P): disconnected
Test point 1	Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 7:
Test point 2	Body ground

Is there 0.1 V or more?


	YES

Repair a short to power in the wire between the electric parking brake/automatic brake hold switch and the gauge control module.?


	NO

The BRAKE HOLD wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good gauge control module, then recheck. If the symptom/indication goes away with a known-good gauge control module, replace the original gauge control module.?

6.

Open wire check (BRAKE HOLD line) 2:

Open wire check (BRAKE HOLD line) 2

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

?2.

Disconnect the following connector.

Gauge control module connector A (32P)

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Electric parking brake/automatic brake hold switch 12P connector: disconnected
	Gauge control module connector A (32P): disconnected
Test point 1	Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 7:
Test point 2	Gauge control module connector A (32P) No. 12

Is there continuity?


	YES

The BRAKE HOLD wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good gauge control module, then recheck. If the symptom/indication goes away with a known-good gauge control module, replace the original gauge control module.?


	NO

Repair an open in the wire between the electric parking brake/automatic brake hold switch and the gauge control module.?