Headlamp LO Does Not Illuminate (Both Sides)

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

HEADLAMP LOW FUSE INSPECTION
Inspect 15A fuse No. 40 LH and fuse No. 41 RH (located in IPDM E/R).

OK or NG

OK: GO TO 2.

NG: Repair headlamp low power supply circuits.
BULB INSPECTION
Inspect inoperative headlamp bulbs.

OK or NG

OK: GO TO 3.

NG: Replace headlamp bulb. "HEADLAMP BULB ".
CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor, make sure "HEAD LAMP SW 1" and "HEAD LAMP SW 2" turns ONOFF linked with operation of lighting switch.

Fig 1: Identifying CONSULT II Display - DATA MONITOR

When lighting switch is in 2ND position : HEAD LAMP SW 1 ON

: HEAD LAMP SW 2 ON

OK or NG

OK: GO TO 4.

NG: Check lighting switch. Refer to "COMBINATION SWITCH INSPECTION ".
HEADLAMP ACTIVE TEST
1. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
  
  Fig 2: Identifying CONSULT II Display - ACTIVE TEST
2. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
3. Touch "LO" on "ACTIVE TEST" screen.
4. Make sure headlamp low beam operates.
  Headlamp low beam should operate.
OK or NG

OK: GO TO 5.

NG: GO TO 6.
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" turns ON when lighting switch is in 2ND position.
  When lighting switch is in 2ND position : HL LO REQ ON
  
  Fig 3: Identifying CONSULT II Display - DATA MONITOR
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 ".

CHECK HEADLAMP INPUT SIGNAL

Turn ignition switch OFF.
Disconnect front headlamp RH and LH connectors.
Turn ignition switch ON.
Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
Touch "LO" on "ACTIVE TEST" screen.

When headlamp low beam is operating, check voltage between front headlamp RH and LH harness connector and ground.

CONNECTOR TERMINAL VOLTAGE CHART

Front headlamp			(-)	Voltage
(+)
Connector		Terminal
RH	E107	3	Ground	Battery voltage
LH	E11	3	Ground	Battery voltage

Fig 4: Checking Voltage Between Front Headlamp Connector Terminal 3 And Ground

OK or NG

OK: GO TO 8.

NG: GO TO 7.

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 54 and front headlamp RH harness connector E107 terminal 3.
  54 - 3 : Continuity should exist.
4. Check continuity between IPDM E/R harness connector E123 terminal 52 and front headlamp LH harness connector E11 terminal 3.
  52 - 3 : Continuity should exist.
  
  Fig 5: Checking Continuity Between IPDM E/R Connector Terminal 52 And Front Headlamp Connector Terminal 3
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. Turn ignition switch OFF.
2. Check continuity between front headlamp RH harness connector E107 terminal 2 and ground.
  2 - Ground : Continuity should exist.
3. Check continuity between front headlamp LH harness connector E11 terminal 2 and ground.
  2 - Ground : Continuity should exist.
  
  Fig 6: Checking Continuity Between Connector E11 Terminal 2 And Ground
OK or NG

OK: Check front headlamp connector for damage or poor connection. Repair as necessary.

NG: Repair harness or connector.