1. SRS system check
Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger)) diagnostic system check-SRS controls".
2. Current DTC check
1) Clear the DTC with a scan tool.
2) Turn OFF the ignition switch for 15 seconds or more.
3) Turn ON the ignition switch.
4) Observe the DTC information with a scan tool for DTC B0070[11] being set as a current failure. Is a DTC set?
Yes
=>Go to Front right side pretensioner circuit check.
No
Go to Intermittent conditions of SRS control.
Refer to "209.Restraints 22D.Symptom Intermittent conditions of SRS control".
3. Front right side pretensioner circuit check
1) Turn OFF the ignition switch for 15 seconds or more.
2) Disconnect the front right side pretensioner harness connector (R18 for regular cab and crew cab models, D28 for extend cab models).
3) Connect the SRS alternative load and the appropriate adapter from the adapter harness kit to the front right side pretensioner harness connector (R18 for regular cab and crew cab models, D28 for extend cab models).
Refer to "LHD SRS airbag (Driver/Passenger)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD SRS airbag (Driver/Passenger)" in the ETM (wiring diagram). (Open using the ETM viewer.).
SST: 5-8840-2857-0 - adapter harness kit
SST: 5-8840-2856-0 - SRS alternative load
4) Turn ON the ignition switch.
5) Observe the DTC information with a scan tool for DTC B0070[11] being set as a current failure. Is a DTC set?
Yes
No
Replace the front right side seat belt with pretensioner.
Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (regular cab) removal".
Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (regular cab) installation".
Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (crew cab) removal".
Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (crew cab) installation".
4. Inspection for short to ground in front right side pretensioner ignition current output (High) circuit
1) Turn OFF the ignition switch for 15 seconds or more.
2) Inspect the right side pretensioner ignition current output (High) circuit between the SRS control unit (pin 5 of R5) and the front right side pretensioner (regular cab and crew cab models: pin 2 of R18, extend cab models: pin 2 of D28) for a short to ground. Is the result normal?
Refer to "LHD SRS airbag (Driver/Passenger)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD SRS airbag (Driver/Passenger)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
No
Repair the circuit as necessary.
5. Inspection for short circuit in front right side pretensioner ignition current output (Low) circuit
1) Inspect the front right side pretensioner ignition current output (Low) circuit between the SRS control unit (pin 6 of R5) and the front right side pretensioner (regular cab and crew cab models: pin 1 of R18, extend cab models: pin 1 of D28) for a short to ground. Is the result normal?
Refer to "LHD SRS airbag (Driver/Passenger)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD SRS airbag (Driver/Passenger)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to SRS control unit replacement.
No
Repair the circuit as necessary.
6. SRS control unit replacement
Note
- Perform the VIN programming and ECU lock after replacing the SRS control unit.
Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit removal".
Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit installation".
Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit setting".
Procedure completion
7. Repair verification
1) Reconnect all of the disconnected harness connectors.
2) Clear the DTC with a scan tool.
3) Turn OFF the ignition switch for 15 seconds or more.
4) Turn ON the ignition switch.
5) Observe the DTC information with a scan tool.