Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger)) diagnostic system check-SRS controls".
1) Observe the IG Voltage parameter on the scan tool. Is the IG Voltage parameter more than or equal to the specified value?
Value: 8.4 V
Yes
Go to Intermittent conditions of SRS control.
Refer to "209.Restraints 22D.Symptom Intermittent conditions of SRS control".
No
=>Go to Charging system inspection.
Refer to "1.Engine 1J.Electrical(4JJ3 without DPD) generator inspection".
Refer to "202.Engine 15C.Functional Inspection(4JJ3 without DPD) charging system check".
Refer to "1.Engine 1J.Electrical(RZ4E-TC) generator inspection".
Refer to "202.Engine 15C.Functional Inspection(RZ4E-TC) charging system check".
1) Inspect the charging system. Is the result normal?
Yes
=>Go to SRS control unit harness connector inspection.
No
Repair the charging system.
1) Inspect for poor connections at the power supply circuit of the SRS control unit harness connector (pin 10 of B8). 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 Inspection for open circuit in SRS control unit ground circuit.
No
Repair the connections as necessary.
1) Inspect the ground circuit between the SRS control unit (pins 10 and 18 of B8) and the ground terminal for an open circuit or high resistance. 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 Ground terminal inspection.
No
Repair the circuit as necessary.
1) Inspect for corrosion or improper installation in the ground terminal section. Is the result normal?
Yes
=>Go to SRS control unit replacement.
No
Repair the ground terminal section as necessary.
Note
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
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.