76-61

SRS DTC Troubleshooting: 76-61

DTC 76-61: No Signal from the E-Pretensioner Unit

NOTE:

- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair and General Troubleshooting Information. Initial Inspection and Diagnostic Overview

- Before this troubleshooting, review Battery Terminal Disconnection and Reconnection. Procedures

1. Clear the DTC memory. Initial Inspection and Diagnostic Overview

2. Read the DTC. Initial Inspection and Diagnostic Overview

Is DTC 76-61 indicated?
YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic Overview If another DTC is indicated, troubleshoot the DTC.


3. Check the No. 31 (7.5 A) fuse in the driver's under-dash fuse/relay box and the No. 4 (30 A) fuse and the No. 8 (30 A) fuse in the passenger's under-dash fuse/relay box.

Are the fuses OK?
YES - Go to step 4.

NO - Replace the faulty fuse. If the problem is still present, short to ground in the driver's under-dash fuse/relay box or passenger's under-dash fuse/relay box circuit.


4. Disconnect E-pretensioner subharness 14P connector B from the E-pretensioner unit.

5. Turn the ignition switch to ON (II).

6. Measure the voltage between the No. 8 terminal of E-pretensioner unit connector B (14P) and body ground. There should be battery voltage.

Is there battery voltage?
YES - Go to step 7.

NO - Open between the No. 31 (7.5 A) fuse in the driver's under-dash fuse/relay box and the No. 8 terminal of E-pretensioner unit connector B (14P).






7. Measure the voltage between the No. 12 terminal of E-pretensioner unit connector B (14P) and body ground. There should be battery voltage.

Is the battery voltage?
YES - Go to step 8.

NO - Open between No. 8 (30 A) fuse in the passenger's under-dash fuse/relay box and the No. 12 terminal of E-pretensioner unit connector B (14P).






8. Disconnect E-pretensioner subharness 5P connector A from the E-pretensioner unit.

9. Measure the voltage between the No. 2 terminal of E-pretensioner unit connector A (5P) and body ground. There should be battery voltage.

Is there battery voltage?
YES - Go to step 10.

NO - Open between No. 4 (30 A) fuse in the passenger's under-dash fuse/relay box and the No. 1 terminal of E-pretensioner unit connector A (5P).






10. Turn the ignition switch to LOCK (0).

11. Measure the resistance between the No. 10 terminal of E-pretensioner unit connector B (14P) and body ground, and between the No. 11 terminal of E-pretensioner unit connector B (14P) and body ground. There should be less than 1.0 Ohms.

Are the resistances as specified?
YES - Go to step 12.

NO - Open between the No 10 terminal of e-pretensioner unit connector B (14P) and body ground, or between the No. 11 terminal of E-pretensioner unit connector B (14P) and body ground or poor connection at G653.






12. Measure the resistance between the No. 5 terminals of E-pretensioner unit connector A (5P) and body ground. There should be less than 1.0 Ohms.

Is the resistance as specified?
YES - Go to step 13.

NO - Open between the No 5 terminal of E-pretensioner unit connector A (5P) and body ground or poor connection G653.





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

14. Disconnect SRS unit connect A (28P) from the SRS unit. Service and Repair

15. Measure the resistance between the No. 14 terminal of SRS unit connector A (28P) and body ground. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?
YES - Go to step 16.

NO - Short to ground between the No. 14 terminal of SRS unit connector A (28P) and the No. 6 terminal of E-pretensioner unit connector B (14P).






16. Measure the resistance between the No. 14 terminal of SRS unit connector A (28P) and the No. 6 terminal of E-pretensioner unit connector B (14P). There should be less than 1.0 Ohms.

Is the resistance as specified?
YES - Faulty E-pretensioner unit; replace the E-pretensioner unit. Removal and Replacement

NO - Open between the No. 14 terminal of SRS unit connector A (28P) and the No. 6 terminal of E-pretensioner unit connector B (14P).