DTC Troubleshooting: 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 were properly installed.
	Before doing this troubleshooting procedure, review SRS Precautions and Procedures, General Troubleshooting Information, and 12 Volt 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

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

Is DTC B0072-11 indicated?

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:

Shorted wire check (RRP?, RRP? lines) 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.

Disconnect the following connector.

SRS unit connector B (39P)

?4.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
Test condition	SRS unit connector B (39P): disconnected
Test point 1	SRS unit connector B (39P) No. 19
Test point 2	Body ground

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

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

The RRP? and RRP? wires are OK. Replace the SRS unit.?

Go to step 3.

Shorted wire check (RRP?, RRP? lines) 2:

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 right side wire harness)

?3.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	SRS unit connector B (39P): disconnected
	Front passenger's seat belt tensioner 2P connector (on the right side wire harness): disconnected
Test point 1	SRS unit connector B (39P) No. 19
Test point 2	Body ground

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

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

The RRP? and RRP? wires are OK. Faulty front passenger's seat belt tensioner; replace the front passenger's seat belt, then clear the DTC.?

Short to ground in the right side wire harness; replace the right side wire harness, then clear the DTC.?