Headlamp LO Does Not Illuminate (One Side)

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

BULB INSPECTION
Inspect inoperative headlamp bulb.

OK or NG
1. OK: GO TO 2.
2. NG: Replace headlamp bulb. Refer to "HEADLAMP (OUTER SIDE), FOR LOW BEAM ".

CHECK POWER TO HEADLAMP

Disconnect inoperative headlamp connector.
Turn the low beam headlamps ON.
Check voltage between inoperative headlamp connector terminal and ground.

HEADLAMP TERMINAL 1 VOLTAGE CHART

Terminals				Voltage (Approx.)
(+)			(-)
Connector	Terminal
Right	E12	1 (R/Y)	Ground	12
Left	E44	1(L)

OK or NG

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

Fig 1: Checking Voltage Between Inoperative Headlamp Connector Terminal & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK HEADLAMP GROUND

Turn the low beam headlamps OFF.
Check continuity between inoperative headlamp connector terminal and ground.

HEADLAMP TERMINAL 2 CONTINUITY CHART

Terminals				Continuity
(+)			(-)
Connector	Terminal (Wire color)
RH	E12	2(B)	Ground	Yes
LH	E44	2(B)

OK or NG

OK: Check headlamp and IPDM E/R connector. Repair as necessary.
NG: Repair open circuit in harness between inoperative headlamp and ground.

Fig 2: Checking Continuity Between Inoperative Headlamp Connector Terminal & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

INSPECTION BETWEEN IPDM E/R AND HEADLAMPS

Disconnect IPDM E/R connector.
Check continuity between harness connector terminals of IPDM E/R harness connector terminals of inoperative headlamp.

IPDM E/R HARNESS CONNECTOR TERMINAL CONTINUITY CHART

Terminals					Continuity
IPDM E/R		Front combination lamp
Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
E122	20(R/Y)	RH	E12	1 (R/Y)	Yes
	30 (L)	LH	E44	1(L)

OK or NG

OK: Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION OF IPDM E/R .
NG: Check for short circuits and open circuits in harness between IPDM E/R and headlamps. Repair as necessary.

Fig 3: Checking Continuity Between Harness Connector Terminals Of IPDM E/R Harness Connector Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.