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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Security Control System (DTC/Circuit Diagnosis) (Except Hybrid)) >> DTC/Circuit Diagnosis >> Horn Function >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. INSPECTION START

    Perform inspection in accordance with procedure that confirms malfunction.

    Which procedure confirms malfunction?

    Component Function Check 1 

    GO TO STEP 2  .

    Component Function Check 2 

    GO TO STEP 4  .

  2. CHECK HORN FUNCTION

    Check that horns function properly using horn switch.

    Do horns sound?

    YES 

    GO TO STEP 3  .

    NO 

    Check horn circuit. Refer to WIRING DIAGRAM .

  3. CHECK HORN CONTROL CIRCUIT

    1. Disconnect horn relay.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between IPDM E/R harness connector and horn relay harness connector.
      IPDM E/R Horn relay Continuity
      Connector Terminal Connector Terminal
      E119 23 H-1 1 Yes
    4. Check continuity between IPDM E/R harness connector and ground.
      IPDM E/R Ground Continuity
      Connector Terminal
      E119 23 No

    Is the inspection result normal?

    YES 

    Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.

  4. CHECK ANTI-THEFT HORN RELAY POWER SUPPLY

    1. Disconnect anti-theft horn relay.
    2. Check voltage between anti-theft horn relay harness connector and ground.
      (+) (-) Voltage (V)
      Anti-theft horn relay
      Connector Terminal
      E8 2 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO-1 

    Check 10 A fuse [No. 57 located in the fuse and fusible link box].

    NO-2 

    Check harness for open or short between anti-theft horn relay and fuse.

  5. CHECK ANTI THEFT HORN CONTROL CIRCUIT

    1. Disconnect IPDM E/R connector.
    2. Check continuity between IPDM E/R harness connector and anti-theft horn relay harness connector.
      IPDM E/R Anti theft horn relay Continuity
      Connector Terminal Connector Terminal
      E119 22 E8 1 Yes
    3. Check continuity between IPDM E/R harness connector and ground.
      IPDM E/R Ground Continuity
      Connector Terminal
      E119 22 No

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace harness.

  6. CHECK ANTI-THEFT HORN CIRCUIT

    1. Check continuity between anti-theft horn relay harness connector and anti-theft horn harness connector.
      Anti-theft horn relay Anti-theft horn Continuity
      Connector Terminal Connector Terminal
      E8 3 E231 1 Yes
    2. Check continuity between anti-theft horn relay harness connector and ground.
      Anti-theft horn relay Ground Continuity
      Connector Terminal
      E8 3 No

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair or replace harness.

  7. CHECK ANTI-THEFT HORN RELAY

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    Replace anti-theft horn.

    NO 

    Replace anti-theft horn relay.

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