Diagnosis Procedure
WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECTION START
Perform inspection in accordance with procedure that confirms malfunction.
Which procedure confirms malfunction?
Component Function Check 1: GO TO 2.
Component Function Check 2: GO TO 4.
- CHECK HORN FUNCTION
Check horn function using horn switch.
Do the horn sound?
YES: GO TO 3.
NO: Check horn circuit. Refer to "WIRING DIAGRAM ".
- CHECK HORN CONTROL CIRCUIT 1
- Disconnect horn relay.
- Disconnect IPDM E/R connector.
- Check continuity between IPDM E/R harness connector and horn relay harness connector.
IPDM E/R Horn relay Continuity Connector Terminal Connector Terminal E6 44 E11 1 Existed - Check continuity between IPDM E/R harness connector and ground.
IPDM E/R Ground Continuity Connector Terminal E6 44 Not existed Is the inspection result normal?
YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".
NO: Repair or replace harness.
- CHECK VEHICLE SECURITY HORN RELAY POWER SUPPLY
- Disconnect vehicle security horn relay.
- Check voltage between vehicle security horn relay harness connector and ground.
(+) (-) Voltage (V) (Approx.) Vehicle security horn relay Connector Terminal E18 1 Ground Battery voltage Is the inspection result normal?
YES: GO TO 5.
NO: Repair or replace harness.
- CHECK HORN CONTROL CIRCUIT 2
- Disconnect IPDM E/R connector.
- Check continuity between IPDM E/R harness connector and vehicle security horn relay harness connector.
IPDM E/R Theft warning horn relay Continuity Connector Terminal Connector Terminal E6 45 E18 3 Existed - Check continuity between IPDM E/R harness connector and ground.
IPDM E/R Ground Continuity Connector Terminal E6 45 Not existed Is the inspection result normal?
YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".
NO: Repair or replace harness.