DTC Troubleshooting: B0050-13

DTC B0050-13: Open or Increased Resistance in the Driver's Seat Belt Buckle Switch

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 and General Troubleshooting Information.

DTC Description	DTC
B0050-13 Open or increased resistance in the driver's seat belt buckle switch

Problem verification:

Problem verification

?1.	Clear the DTCs with the HDS.

?2.	Turn the vehicle to the ON mode, then wait for 10 seconds. Buckle and unbuckle the driver's seat belt several times.

?3.

Check for DTCs with the HDS.

DTC Description	DTC
B0050-13 Open or increased resistance in the driver's seat belt buckle switch

Is DTC B0050-13 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.?

Driver's seat belt buckle switch check:

Driver's seat belt buckle switch check

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

?2.	Disconnect the driver's seat belt buckle switch 2P connector (A) on the floor wire harness.

?3.

Connect terminals A and B with a jumper wire.

Terminal A	Driver's seat belt buckle switch 2P connector No. 1 (on the floor wire harness)
Terminal B	Driver's seat belt buckle switch 2P connector No. 2 (on the floor wire harness)

?4.	Clear the DTCs with the HDS.

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

?6.

Check for DTCs with the HDS.

DTC Description	DTC
B0050-11 Short or decreased resistance in the driver's seat belt buckle switch

Is DTC B0050-11 indicated?


	YES

Open in the driver's seat belt buckle switch; replace the driver's seat belt buckle assembly, then clear the DTC.?


	NO

Go to step 3.

Open wire check (FLBC line):

Open wire check (FLBC 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 jumper wire from the driver's seat belt buckle switch 2P connector on the floor wire harness.

?4.

Disconnect the following connector.

SRS unit connector B (39P)

?5.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Driver's seat belt buckle switch 2P connector (on the floor wire harness): disconnected
	SRS unit connector B (39P): disconnected
Test point 1	Driver's seat belt buckle switch 2P connector No. 1 (on the floor wire harness)
Test point 2	SRS unit connector B (39P) No. 29

Is there 1.0 ? or less?


	YES

The FLBC wire is OK. Go to step 4.


	NO

Open or increased resistance in the floor wire harness; replace the floor wire harness, then clear the DTC.?

Open wire check (GND line):

Open wire check (GND line)

?1.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Driver's seat belt buckle switch 2P connector (on the floor wire harness): disconnected
	SRS unit connector B (39P): disconnected
Test point 1	Driver's seat belt buckle switch 2P connector No. 2 (on the floor seat wire harness)
Test point 2	Body ground

Is there 1.0 ? or less?


	YES

The GND wire is 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, 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 floor wire harness.?


	NO

Open or increased resistance in the floor wire harness; check for a poor ground. If the ground is OK, replace the floor wire harness, then clear the DTC.?