Refer to "64.Body Control 10I.Troubleshooting(Information Module) diagnostic system check - information module".
1) Connect the scan tool.
2) Display the Vehicle Configuration All Data Setting / Change on the scan tool and verify that the equipped ECU information is programmed correctly.
3) If it is not programmed correctly, reprogram the correct value.
Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control information module setting".
Procedure completion
1) Turn OFF the ignition switch.
2) Turn ON the ignition switch and wait for 5 seconds or more.
3) Observe the DTC information with a scan tool. Is a DTC set?
Yes
=>Go to SRS control unit communication verification.
No
Go to Intermittent conditions of information module.
Refer to "223.Body Control 36D.Symptom(Information Module) Intermittent Conditions of Information Module".
1) Verify that communication can be established with the SRS control unit using the scan tool. Can communication with SRS control unit M be established?
Yes
=>Go to SRS control unit DTC check.
No (Models with radar sensors/stereo cameras)
Go to Lost communication with the SRS control unit.
No (Models without radar sensors and stereo cameras)
Go to Lost communication with the SRS control unit.
1) Observe the SRS control unit DTC information with a scan tool. Is a SRS control unit DTC set?
Yes
Go to the applicable DTC diagnosis.
No
=>Go to CAN communication circuit inspection.
1) Inspect the CAN Low circuit and CAN High circuit between the information module (pins 11 and 23 of C105) and the SRS control unit (pins 16 and 17 of B8 or pins 13 and 14 of B9) for the following. Is the result normal?
Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Controller Area Network (Except Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to SRS control unit harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect for poor connections at the SRS control unit harness connector (pins 16 and 17 of B8 or pins 13 and 14 of B9). Is the connection status normal?
Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Controller Area Network (Except Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to Information module harness connector inspection.
No
Repair the connections as necessary.
1) Inspect for poor connections at the information module harness connector (pins 11 and 23 of C105). Is the connection status normal?
Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Controller Area Network (Except Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
Replace the SRS control unit.
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".
=>Go to Current DTC follow-up check.
No
Repair the connections as necessary.
1) Turn OFF the ignition switch for 30 seconds or more.
2) Turn ON the ignition switch and wait for 5 seconds or more.
3) Observe the DTC information with a scan tool. Is a DTC set?
Yes
=>Go to Information module replacement.
No
Note
Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control information module removal".
Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control information module installation".
Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control information module setting".
Procedure completion
1) Turn OFF the ignition switch for 30 seconds or more.
2) Turn ON the ignition switch and wait for 5 seconds or more.
3) Observe the DTC information with a scan tool.