Security Control System (DTC/Circuit Diagnosis)
WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HORN FUNCTION
Check horn function with horn switch.
Do horns sound?
YES
GO TO 2 .
NO
Perform the trouble diagnosis for horn circuit. Refer to the appropriate Wiring Diagram .
- CHECK IPDM E/R POWER SUPPLY CIRCUIT
- Disconnect horn relay connector.
- Check continuity between IPDM E/R harness connector and horn relay harness connector.
IPDM E/R
Horn relay
Continuity
Connector
Terminal
Connector
Terminal
E122
48
H-1
1
Yes
- Check continuity between IPDM E/R harness connector and ground.
IPDM E/R
Ground
Continuity
Connector
Terminal
E122
48
No
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to Removal and Installation of IPDM E/R .
NO
Repair or replace harness.