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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Daytime Running Light Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK DAYTIME RUNNING LIGHT RELAY FUSES 
    1. Turn ignition switch OFF.
    2. Check that the following fuses are not blown (open).

      Unit

      Location

      Fuse No.

      Capacity

      Daytime running light relay

      [Switch side (Daytime running light RH)]

      IPDM E/R

      #58

      10 A

      Daytime running light relay

      [Switch side (Daytime running light LH)]

      Daytime running light relay

      (Coil side)

      Fuse block (J/B)

      #11

    Is the fuse blown (open)?

    YES

    Replace the blown fuse after repairing the affected circuit if a fuse is blown (open).

    NO

    GO TO 2.

  2. CHECK DAYTIME RUNNING LIGHT RELAY POWER SUPPLY 
    1. Remove daytime running light relay.
    2. Check voltage between daytime running light relay harness connector and ground.

      +

      -

      Voltage

      Daytime running light relay

      Connector

      Terminal

      Switch side

      (Daytime running light RH)

      E50

      7

      Ground

      Battery voltage

      Switch side

      (Daytime running light LH)

      5

      Coil side

      2

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Switch side: GO TO 3.

    NO

    Coil side: Check battery power supply circuit. Refer to Wiring Diagram - BATTERY POWER SUPPLY - .

  3. CHECK DAYTIME RUNNING LIGHT RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT 
    1. Disconnect IPDM E/R connector.
    2. Check continuity between daytime running light relay harness connector and IPDM E/R harness connector.

      Daytime running light relay

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      Switch side

      (Daytime running light RH)

      E50

      7

      E7

      48

      Existed

      Switch side

      (Daytime running light LH)

      5

    Is the inspection result normal?

    YES

    Replace IPDM E/R. Refer to Removal and Installation .

    NO

    Repair or replace harness.

  4. CHECK DAYTIME RUNNING LIGHT RELAY 

    Check daytime running light relay. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Replace daytime running light relay.

  5. CHECK DAYTIME RUNNING LIGHT RELAY CONTROL SIGNAL 

    SYMBOL With CONSULT

    1. Install daytime running light relay.
    2. Turn ignition switch ON.
    3. Select "HEAD LAMP" of "BCM" using CONSULT.
    4. Select "DAYTIME RUNNING LIGHT" in "Active Test" mode.
    5. With operating the test item, check voltage between IPDM E/R harness connector and ground.

      +

      -

      Test item

      Voltage

      IPDM E/R

      Connector

      Terminal

      E5

      23

      Ground

      DAYTIME RUNNING LIGHT

      On

      0 - 1 V

      Off

      9 - 16 V

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    Fixed at 0 - 1 V: GO TO 7.

    NO

    Fixed at 9 - 16 V: GO TO 6.

  6. CHECK DAYTIME RUNNING LIGHT REQUEST SIGNAL 

    SYMBOL With CONSULT

    1. Select "DTRL REQ" in "Data Monitor" mode of "IPDM E/R" using CONSULT.
    2. With operating the daytime running light ON condition, check the monitor status.

      Monitor item

      Condition

      Monitor status

      DTRL REQ

      Daytime running light

      ON condition

      On

      OFF condition

      Off

    Is the inspection result normal?

    YES

    Replace IPDM E/R. Refer to Removal and Installation .

    NO

    Replace BCM. Refer to Removal and Installation .

  7. CHECK DAYTIME RUNNING LIGHT RELAY CONTROL SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Remove daytime running light relay.
    3. Disconnect IPDM E/R connector.
    4. Check continuity between daytime running light relay harness connector and IPDM E/R harness connector.

      Daytime running light relay

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E50

      1

      E5

      23

      Existed

    Is the inspection result normal?

    YES

    Replace IPDM E/R. Refer to Removal and Installation .

    NO

    Repair or replace harness.

  8. CHECK DAYTIME RUNNING LIGHT POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Remove daytime running light relay.
    3. Disconnect front combination lamp connector.
    4. Check continuity between daytime running light relay harness connector and front combination lamp harness connector.

      Daytime running light relay

      Front combination lamp

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      RH

      E50

      6

      E49

      1

      Existed

      LH

      3

      E48

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    Repair or replace harness.

  9. CHECK DAYTIME RUNNING LIGHT GROUND CIRCUIT 

    Check continuity between front combination lamp harness connector and ground.

    Front combination lamp

    --

    Continuity

    Connector

    Terminal

    RH

    E49

    4

    Ground

    Existed

    LH

    E48

    Is the inspection result normal?

    YES

    Replace the corresponding front combination lamp. Refer to Removal and Installation .

    NO

    Repair or replace harness.