DTC Troubleshooting: B0001-2B (KA/KC) - Honda CR-V RW/RT 2017-2020

DTC Troubleshooting: B0001-2B

DTC B0001-2B: Short to Another Wire Harness in the Driver's Airbag First Inflator

NOTE:

	Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components of the correct part number and were properly installed.
	Before doing this troubleshooting procedure, review SRS Precautions and Procedures, General Troubleshooting Information, and 12 Volt Battery Terminal Disconnection and Reconnection.

DTC Description	DTC
B0001-2B Short to another wire harness in the driver's airbag first inflator

Problem verification:

Problem verification

?1.	Clear the DTCs with the HDS.

?2.	Turn the vehicle to the ON mode, then wait for 10 seconds.

?3.

Check for DTCs with the HDS.

DTC Description	DTC
B0001-2B Short to another wire harness in the driver's airbag first inflator

Is DTC B0001-2B indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

DTC check:

DTC check

?1.

Check for DTCs with the HDS.

DTC Description	DTC
B0001-2B Short to another wire harness in the driver's airbag first inflator
B0002-2B Short to another wire harness in the driver's airbag second inflator
B0010-2B Short to another wire harness in the front passenger's airbag first inflator
B0011-2B Short to another wire harness in the front passenger's airbag second inflator
B0020-2B Short to another wire harness in the left side airbag inflator
B0021-2B Short to another wire harness in the left side curtain airbag first inflator
B0028-2B Short to another wire harness in the right side airbag inflator
B0029-2B Short to another wire harness in the right side curtain airbag first inflator
B0070-2B Short to another wire harness in the driver's seat belt tensioner
B0072-2B Short to another wire harness in the front passenger's seat belt tensioner
B0079-2B Short to another wire harness in the driver's seat belt outer lap tensioner
B007A-2B Short to another wire harness in the front passenger's seat belt outer lap tensioner
B0082-2B Short to another wire harness in the selectable energy absorption device of the front passenger's seat belt tensioner

Is DTC B0002-2B, B0010-2B, B0011-2B, B0020-2B, B0021-2B, B0028-2B, B0029-2B, B0070-2B, B0072-2B, B0079-2B, B007A-2B or B0082-2B indicated with DTC B0001-2B?


	YES

Go to step 3.


	NO

Go to step 4.

Shorted wire check (LA1 lines to another line):

Shorted wire check (LA1 lines to another line)

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

?2.	Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.

?3.	Remove the driver's airbag.

?4.

Disconnect the following connectors.

SRS unit connector A (39P)

SRS unit connector B (39P)

Driver's airbag second inflator 2P connector (on the cable reel harness)

Inflator connectors which are assigned to 2B codes listed on HDS

NOTE: Make sure to work with the driver's airbag first inflator 2P connector (A) that has a guide tab (B) on the right side of the No. 2 terminal as shown.

?5.

Check for continuity between test points 1 and 2 of SRS unit connector A (39P) and B (39P) according to table.

Test condition	Vehicle OFF (LOCK) mode
	SRS unit connector A (39P): disconnected
	SRS unit connector B (39P): disconnected
	Driver's airbag first inflator 2P connector (on the cable reel harness): disconnected
	Inflator connectors which are assigned to 2B codes listed on HDS: disconnected

DTC	Test point 1	Test point 2
DTC	From terminal	To terminal
B0002-2B	SRS unit connector A (39P) No. 9	SRS unit connector A (39P) No. 10
B0002-2B	SRS unit connector A (39P) No. 8	SRS unit connector A (39P) No. 11
B0010-2B	SRS unit connector A (39P) No. 9	SRS unit connector A (39P) No. 5
B0010-2B	SRS unit connector A (39P) No. 8	SRS unit connector A (39P) No. 4
B0011-2B	SRS unit connector A (39P) No. 9	SRS unit connector A (39P) No. 6
B0011-2B	SRS unit connector A (39P) No. 8	SRS unit connector A (39P) No. 7
B0020-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 5
B0020-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 6
B0021-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 9
B0021-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 10
B0028-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 4
B0028-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 3
B0029-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 8
B0029-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 7
B0070-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 20
B0070-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 21
B0072-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 19
B0072-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 18
B0079-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 24
B0079-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 25
B007A-2B	SRS unit connector A (39P) No. 9	SRS unit connector B (39P) No. 23
B007A-2B	SRS unit connector A (39P) No. 8	SRS unit connector B (39P) No. 22
B0082-2B	SRS unit connector A (39P) No. 9	SRS unit connector A (39P) No. 2
B0082-2B	SRS unit connector A (39P) No. 8	SRS unit connector A (39P) No. 3

Is there continuity?


	YES

Short to another wire in the dashboard wire harness or the floor wire harness; replace the faulty harness, then clear the DTC.?


	NO

The LA1 wires are OK. Faulty SRS unit or poor connection at SRS unit connector A (39P) and the SRS unit, or SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the SRS unit. If the DTC does not clear, replace the dashboard wire harness or the floor wire harness.?

Shorted wire check (LA1+ line to LA2+ line, LA1- line to LA2- line) 1:

Shorted wire check (LA1+ line to LA2+ line, LA1- line to LA2- line) 1

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

?2.	Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.

?3.	Remove the driver's airbag.

?4.

Disconnect the following connector.

Driver's airbag first inflator 2P connector (on the cable reel harness)

Driver's airbag second inflator 2P connector (on the cable reel harness)

?5.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Driver's airbag first inflator 2P connector (on the cable reel harness): disconnected
	Driver's airbag second inflator 2P connector (on the cable reel harness): disconnected
Test point 1	Driver's airbag first inflator 2P connector No. 2 (on the cable reel harness)
Test point 2	Driver's airbag second inflator 2P connector No. 2 (on the cable reel harness)

Test point 1	Driver's airbag first inflator 2P connector No. 1 (on the cable reel harness)
Test point 2	Driver's airbag second inflator 2P connector No. 1 (on the cable reel harness)

Is there continuity?


	YES

Go to step 5.


	NO

The LA1+, LA1-, LA2+, and LA2- wires are OK. Faulty driver's airbag second inflator; replace the driver's airbag, then clear the DTC.?

Shorted wire check (LA1+ line to LA2+ line, LA1- line to LA2- line) 2:

Shorted wire check (LA1+ line to LA2+ line, LA1- line to LA2- line) 2

?1.	Remove the column covers.

?2.	Disconnect cable reel connector B (4P) on the dashboard wire harness.

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Driver's airbag first inflator 2P connector (on the cable reel harness): disconnected
	Driver's airbag second inflator 2P connector (on the cable reel harness): disconnected
	Cable reel connector B (4P) (on the dashboard wire harness): disconnected
Test point 1	Driver's airbag first inflator 2P connector No. 2 (on the cable reel harness)
Test point 2	Driver's airbag second inflator 2P connector No. 2 (on the cable reel harness)

Test point 1	Driver's airbag first inflator 2P connector No. 1 (on the cable reel harness)
Test point 2	Driver's airbag second inflator 2P connector No. 1 (on the cable reel harness)

Is there continuity?


	YES

Short to another wire in the cable reel; replace the cable reel, then clear the DTC.?


	NO

Go to step 6.

Shorted wire check (LA1+ line to LA2+ line, LA1- line to LA2- line) 3:

Shorted wire check (LA1+ line to LA2+ line, LA1- line to LA2- line) 3

?1.

Disconnect the following connectors.

SRS unit connector A (39P)

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	SRS unit connector A (39P): disconnected
	Driver's airbag first inflator 2P connector (on the cable reel harness): disconnected
	Driver's airbag second inflator 2P connector (on the cable reel harness): disconnected
	Cable reel connector B (4P) (on the dashboard wire harness): disconnected
Test point 1	SRS unit connector A (39P) No. 9
Test point 2	SRS unit connector A (39P) No. 10

Test point 1	SRS unit connector A (39P) No. 8
Test point 2	SRS unit connector A (39P) No. 11

Is there continuity?


	YES

Short to another wire in the dashboard wire harness; replace the dashboard wire harness, then clear the DTC.?


	NO

The LA1+, LA1-, LA2+, and LA2- wires are OK. Faulty SRS unit or poor connection at SRS unit connector A (39P) and the SRS unit. Check the connection; if the connection is OK, check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the SRS unit. If the DTC does not clear, replace the dashboard wire harness.?