Headlamp HI Does Not Illuminate (Both Sides)

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor, make sure "HI BEAM SW" turns ON-OFF linked with operation of lighting switch.
- When lighting switch is in HIGH position: HI BEAM SW ON
OK or NG
- OK: GO TO 2.
- NG: Check lighting switch. Refer to "COMBINATION SWITCH INSPECTION ".
Fig 1: Identifying "HI BEAM SW" Turned "ON"
Courtesy of NISSAN MOTOR CO., U.S.A.
HEADLAMP ACTIVE TEST
1. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
2. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
3. Touch "HI" on "ACTIVE TEST" screen.
4. Make sure headlamp high beam operates.
  - Headlamp high beam should operate.
OK or NG
- OK: GO TO 3.
- NG: GO TO 4.
Fig 2: Identifying "ACTIVE TEST" Display
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK IPDM E/R
1. Select "IPDM E/R" on CONSULT-II, and select "DATA MONITOR" on "SELECT DIAG MODE" screen.
2. Make sure "HL LO REQ" and "HL HI REQ" turns ON when lighting switch is in HIGH position.
  - When lighting switch is in: HL LO REQ ON
  - HIGH position: HL HI REQ ON
OK or NG
- OK: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".
- NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
Fig 3: Identifying "HL LO REQ" And "HL HI REQ" Turned "ON"
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HEADLAMP INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front combination lamp RH and LH connectors.
3. Turn ignition switch ON.
4. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
5. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
6. Touch "HI" on "ACTIVE TEST" screen.
7. When headlamp high beam is operating, check voltage between front combination lamp RH and LH harness connector and ground.
  
  Fig 4: Checking Voltage Between Front Combination Lamp RH, LH Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Front Combination Lamp RH, LH Harness Connector And Ground Voltage Specification Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 6.
- NG: GO TO 5.
CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector E123 terminal 56 (L/W) and front combination lamp RH harness connector E107 terminal 6 (L/W).
  - 56 (L/W) - 6 (L/W): Continuity should exist.
4. Check continuity between IPDM E/R harness connector E123 terminal 55 (G) and front combination lamp LH harness connector E11 terminal 6 (G).
  - 55 (G) - 6 (G): Continuity should exist.
  Fig 6: Checking Continuity Between IPDM E/R Harness Connector E123 Terminal 55 And Front Combination Lamp LH Harness Connector E11 Terminal 6
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".
- NG: Repair harness or connector.
CHECK HEADLAMP GROUND
1. Check continuity between front combination lamp RH harness connector E107 terminal 2 (B) and ground.
  - 2 (B) - Ground: Continuity should exist.
2. Check continuity between front combination lamp LH harness connector E11 terminal 2 (B) and ground.
  - 2 (B) - Ground: Continuity should exist.
OK or NG
- OK: Check front combination lamp connector for damage or poor connection. Repair as necessary.
- NG: Repair harness or connector.
Fig 7: Checking Continuity Between Front Combination Lamp LH Harness Connector E11 Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.