( TF09E00K791000R211XFAAT00 )

SRS DTC Troubleshooting: 21-1x, 21-2x

DTC 21-1x (‘‘x'' can be 0 thru 9 or A thru F):

Open in the Left Side Seat Belt Tensioner

DTC 21-2x (‘‘x'' can be 0 thru 9 or A thru F):

Increased Resistance in the Left Side Seat Belt Tensioner

NOTE:

Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.
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.

Is DTC 21-1x or 21-2x indicated?

YES	-	Go to Step 4 .
NO	-	Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.

Install a jumper wire between the No. 2 and the No. 3 terminals of the floor wire harness 4P connector.

Is DTC 21-1x or 21-2x indicated?

YES	-	Go to Step 12 .
NO	-	Faulty left side seat belt tensioner; replace the left side seat belt tensioner. ■

Install a jumper wire between the No. 12 and the No. 13 terminals of SRS unit connector B (39P).

Check for continuity between the No. 2 and the No. 3 terminals of floor wire harness 4P connector.

Is there continuity?

YES	-	Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection between the connector and the SRS unit. If the connection is OK, replace the SRS unit. ■
NO	-	Open or increased resistance in the floor wire harness; replace the floor wire harness.■