Headlamp - Headlamp Aiming Control - Trouble-diagnosis
EL-54flowchartStep-B switch-continuity table dots not fully legible; captured the typical Nissan 4-position rotary switch pattern with `??` left out where uncertain.
Trouble-diagnosis
NOTE
SYMPTOM: Headlamp aiming does not operate.
Headlamp aiming trouble-diagnosis
1
POWER SUPPLY CIRCUIT CHECK (For aiming switch). Check if 12 volts exist between terminals 1 and 6. Voltmeter terminals (+)1 / (-)6 → approx. 12 V.
N.G.
Check 10A fuse at fuse block. (Refer to "POWER SUPPLY ROUTING.")
O.K.
2
AIMING SWITCH CHECK. Check continuity between terminals at each switch position. Switch 0: 1-2 & 1-3; Switch 1: 2-3; Switch 2: 4-5 (??); Switch 3: 1-5.
N.G.
Replace aiming switch.
O.K.
3
GROUND CIRCUIT CHECK FOR AIMING MOTOR. Check continuity between terminal 6 and body ground. Continuity exists ... O.K.
N.G.
Repair harness between aiming motor and body ground.
O.K.
4
POWER SUPPLY CIRCUIT CHECK (For aiming motor unit). Check if 12 volts exist between terminals 1, 2, 3, 4 and 6. Voltage Approx. 12 at position 0/1/2/3 respectively; 0 V otherwise.
N.G.
Check harness between aiming switch and aiming motor unit.
O.K.
5
Replace aiming motor unit.
Aiming Switch continuity (Step B)
0
Terminal 1o
Terminal 2o
Terminal 3o
Terminal 4
Terminal 5
1
Terminal 1o
Terminal 2
Terminal 3o
Terminal 4
Terminal 5
2
Terminal 1o
Terminal 2
Terminal 3
Terminal 4o
Terminal 5
3
Terminal 1o
Terminal 2
Terminal 3
Terminal 4
Terminal 5o
Aiming Motor power-supply voltage (Step D)
1
Voltage [V]Approx. 12
Aiming switch position"0"
1
Voltage [V]0
Aiming switch positionExcept "0"
2
Voltage [V]Approx. 12
Aiming switch position"1"
2
Voltage [V]0
Aiming switch positionExcept "1"
3
Voltage [V]Approx. 12
Aiming switch position"2"
3
Voltage [V]0
Aiming switch positionExcept "2"
4
Voltage [V]Approx. 12
Aiming switch position"3"
4
Voltage [V]0
Aiming switch positionExcept "3"
See also
EL - Power Supply Routing