Daytime Light Control Does Not Operate Properly

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DAYTIME LIGHT RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Remove daytime light relay.
3. Check voltage between daytime light relay harness connector E15 terminal 2 (BR) and ground.
  1. 2 (BR) - Ground: Battery voltage.
4. Check voltage between daytime light relay harness connector E15 terminal 5 (BR) and ground.
  1. 5 (BR) - Ground: Battery voltage.
  Fig 1: Checking Voltage Between Terminal 5 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair harness or connector.
CHECK DAYTIME LIGHT RELAY
Apply battery voltage to between daytime light relay terminal 1, 2 and check continuity between terminal 3 and 5.
1. 3-5: Continuity should exist.
OK or NG
1. OK: GO TO 3.
2. NG: Replace daytime light relay.
Fig 2: Applying Battery Voltage To Between Terminal 1 And 2
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DAYTIME LIGHT RELAY CIRCUIT
1. Disconnect clearance lamp RH and LH connector.
2. Check continuity between daytime light relay connector E15 terminal 3 (G) and clearance lamp RH harness connector E23 terminal 1 (G).
  1. 3 (G) - 1 (G): Continuity should exist.
3. Check continuity between daytime light relay connector E15 terminal 3 (G) and clearance lamp LH harness connector E43 terminal 1 (G).
  1. 3 (G) - 1 (G): Continuity should exist.
  Fig 3: Checking Continuity Between Terminal 3 And Terminal 1
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Repair harness or connector.
CHECK GROUND
1. Check continuity between clearance lamp RH harness connector E23 terminal 3 (B) and ground.
  1. 3 (B) - Ground: Continuity should exist.
2. Check continuity between clearance lamp LH harness connector E43 terminal 3 (B) and ground.
  1. 3 (B) - Ground: Continuity should exist.
OK or NG
1. OK: GO TO 5.
2. NG: Repair harness or connector.
Fig 4: Checking Continuity Between Terminal 3 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK BULB
Inspect bulbs of lamp which do not illuminate.

OK or NG
1. OK: GO TO 6.
2. NG: Replace bulb.
CHECK DAYTIME RELAY CIRCUIT
1. Disconnect combination meter connector.
2. Check continuity between daytime lamp relay harness connector E15 terminal 1 (L) and combination meter harness connector M20 terminal 10 (L/W).
  1. 1 (L)-10(L/W): Continuity should exist.
OK or NG
1. OK: GO TO 7.
2. NG: Repair harness or connector.
Fig 5: Checking Continuity Between Terminal 1 And Terminal 10
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK INPUT SIGNAL
1. Connect combination meter connector.
2. Start engine running.
3. Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor, make sure "ENGINE RUN" turns ON-OFF linked with operation of engine running or stop.
  1. Engine running: ENGINE RUN ON
  2. Engine stop: ENGINE RUN OFF
4. Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor, make sure "PKB SW" turns ON-OFF linked with operation of parking brake switch.
  1. Parking brake ON: PKR SW ON
  2. Parking brake OFF: PKR SW OFF
  Fig 6: CONSULT-II Diagnosis Function Display (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
2. NG: GO TO 8.
CHECKING CAN COMMUNICATIONS
Select "BCM" by CONSULT-II, and perform self-diagnosis for "BCM".

Displayed self-diagnosis results
1. NO DTC: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
2. CAN COMM CIRCUIT: Check BCM CAN communication system.
Refer to "CAN COMMUNICATION INSPECTION USING CONSULT-II (SELF-DIAGNOSIS) ".

Fig 7: CONSULT-II Diagnosis Function Display (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.