DTC Troubleshooting: 4-1, 4-2

DTC 4-1:  Open in Right Side Seat Belt Tensioner
DTC 4-2:  Increase Resistance in Right Side Seat Belt Tensioner

Special Tools Required
SRS inflator simulator (  07SAZ-TB4011A)
 

SRS simulator lead C (  07TAZ-SZ5011A)
 
SRS simulator lead F (  07XAZ-SZ30100)
 


1.Erase the DTC memory.

2.Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

Does the SRS indicator stay on?


YES - Go to 3.


NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures.


3.Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.

4.Disconnect the TR1o connector from the TR1i connector (1).

 

5.Connect the special tool (2 W connector) to the TR1i connector.

6.Reconnect the battery negative cable.

7.Erase the DTC memory.

8.Read the DTC.

Is DTC 4-1 or DTC 4-2 indicated?


YES - Go to 9.


NO - Open or increased resistance in the right side seat belt tensioner; replace the right side seat belt.n


9.Disconnect the battery negative cable, and wait for three minutes.

10.Disconnect the T2o connector (1) from the T2i connector (2).

 

11.Connect the special tool (2 W connectors) to the T2i connector.

12.Reconnect the battery negative cable.

13.Erase the DTC memory.

14.Read the DTC.

Is DTC 4-1 indicated?


YES - Go to 15.


NO - Open or increased resistance in the floor wire harness; replace the floor wire harness.n

15.Disconnect the battery negative cable, and wait for 3 minutes.

16.Disconnect the D1o connector (1), P1o connector (2), and TL1i connector (3).

 

17.Disconnect the U1o connector (1) from the  SRS unit (A).

 


18.Check resistance between the No. 9 terminal and the No. 18 terminal of U1o connector. There should be 2.0-3.0 W.

 

Is the resistance as specified?


YES - Faulty  SRS unit or poor contact at U1o connector and the  SRS unit. Check the connection between connector and the  SRS unit. If the connection is OK, replace the SRS unit.n


NO - Open or increased resistance in dashboard wire harness B; replace dashboard wire harness B.n