Headlamp Low Beam Does Not Illuminate (One Side)

CHECK BULB
- Check ballasts (HID control unit) and xenon bulb of lamp which does not illuminate. Refer to "XENON HEADLAMP TROUBLE DIAGNOSIS ". (Xenon bulb models)
- Check bulb of lamp which does not illuminate. (Halogen bulb models)
OK or NG
1. OK: GO TO 2.
2. NG: Repair malfunctioning part.

CHECK HEADLAMP INPUT SIGNAL

Turn ignition switch OFF.
Disconnect front combination lamp RH or LH connector.
Turn ignition switch ON.
Lighting switch is turned 2ND position.

Check voltage between front combination lamp RH or LH harness connector and ground.

HEADLAMP INPUT SIGNAL TERMINAL VOLTAGE SPECIFICATION

Terminals				Voltage
(+)			(-)
Connector	Terminal (Wire color)		(-)
RH	E24	3 (R)	Ground	Battery voltage
LH	E41	3 (R/B)	Ground	Battery voltage

OK or NG

OK: GO TO 4.
NG: GO TO 3.

Fig 1: Checking Voltage Between Front Combination Lamp RH Or LH Harness Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and front combination lamp RH or LH connector.
3. Check continuity between IPDM E/R harness connector E7 terminal 20 (R) and front combination lamp RH harness connector E24 terminal 3 (R).
  20 (R) - 3 (R): Continuity should exist.
4. Check continuity between IPDM E/R harness connector E7 terminal 30 (R/B) and front combination lamp LH harness connector E41 terminal 3 (R/B).
  30 (R/B) - 3 (R/B): Continuity should exist.
  
  Fig 2: Checking Continuity Between IPDM E/R Harness Connector And Front Combination Lamp Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace IPDM E/R.
2. NG: Repair harness or connector.
CHECK HEADLAMP GROUND
1. Check continuity between front combination lamp RH harness connector E24 terminal 5 (B) and ground.
  5 (B) - Ground: Continuity should exist.
2. Check continuity between front combination lamp LH harness connector E41 terminal 5 (B) and ground.
  5 (B) - Ground: Continuity should exist.
  
  Fig 3: Checking Continuity Between Front Combination Lamp Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Check headlamp harness and connectors.
2. NG: Repair harness or connector.