DTC B0072-11

DTC B0072-11 : Short to Ground in the Front Passenger's Seat Belt Tensioner

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 that they were properly installed .
Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and Battery Terminal Disconnection and Reconnection .
Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software , and retest.

DTC Description	DTC
B0072-11 Short to ground in the front passenger's seat belt tensioner

DTC (SRS)

Problem verification

-1. Clear the DTCs with the HDS .

-2. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.

-3. Check for DTCs with the HDS .

DTC Description	DTC
B0072-11 Short to ground in the front passenger's seat belt tensioner

Is DTC B0072-11 indicated?

YES

The failure is duplicated. Go to step 2.

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

Shorted wire check (RRP+, RRP- lines) 1

-1. Press the engine start/stop button to select the OFF mode.

-2. Disconnect the negative cable from the battery, then wait at least 3 minutes.

-3. Disconnect the following connector.

SRS unit connector B (39P)

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

Test condition	OFF mode
Test condition	SRS unit connector B (39P): disconnected
Test circuit	RRP+
Test point 1	SRS unit connector B (39P) No. 17
Test point 2	Body ground

Test circuit	RRP-
Test point 1	SRS unit connector B (39P) No. 18
Test point 2	Body ground

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

Is there an open circuit, or at least 1 MΩ?

YES

The RRP+ and RRP- wires are OK. Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit . If the DTC does not clear, replace the floor wire harness.

Go to step 3.

Shorted wire check (RRP+, RRP- lines) 2

-1. Remove the right side B-pillar lower trim .

-2. Disconnect the following connector.

Front passenger's seat belt tensioner 2P connector (on the floor wire harness)

-3. Measure the resistance between test points 1 and 2.

Test condition	OFF mode
	SRS unit connector B (39P): disconnected
	Front passenger's seat belt tensioner 2P connector (on the floor wire harness): disconnected
Test circuit	RRP+
Test point 1	SRS unit connector B (39P) No. 17
Test point 2	Body ground

Test circuit	RRP-
Test point 1	SRS unit connector B (39P) No. 18
Test point 2	Body ground

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

Is there an open circuit, or at least 1 MΩ?

YES

The RRP+ and RRP- wires are OK. Short to ground in the front passenger's seat belt tensioner; replace the front passenger's seat belt , then clear the DTC.

Short to ground in the floor wire harness; replace the floor wire harness, then clear the DTC.