Diagnosis Procedure
WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK POWER SUPPLY CIRCUIT - 1
Check voltage between pre-crash seat belt control unit LH and RH harness connector and ground.
Pre-crash seat belt control unit
Ground
Voltage
(Approx.)
Connector
Terminal
B58 LH side
1
Battery voltage
B160 RH side
Is the inspection result normal?
YES
GO TO 3
NO
GO TO 2
- CHECK POWER SUPPLY CIRCUIT - 2
- Disconnect fuse block (J/B) harness connector.
- Check continuity between pre-crash seat belt control unit LH and RH harness connector and fuse block (J/B) harness connector.
Pre-crash seat belt control unit
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
B58 LH side
1
M68
3R
Yes
B160 RH side
- Check continuity between pre-crash seat belt control unit LH and RH harness connector and ground.
Pre-crash seat belt control unit
Ground
Continuity
Connector
Terminal
B58 LH side
1
No
B160 RH side
Is the inspection result normal?
YES
GO TO 3.
NO
Repair harness or connector.
- CHECK GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect pre-crash seat belt control unit LH and RH harness connector.
- Check continuity between pre-crash seat belt control unit LH and RH harness connector and ground.
Pre-crash seat belt control unit
Ground
Continuity
Connector
Terminal
B58 LH side
18
Yes
20
B160 RH side
18
20
Is the inspection result normal?
YES
Inspection End.
NO
Repair harness or connector.