Nissan Altima 2007-2012 Service Manual: Electrical load signal
Description
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred through the CAN communication line.
Component Function Check
1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Connect CONSULT-III and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal? YES >> GO TO 2.
NO >> Go to EC-954, "Diagnosis Procedure".
2.CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal? YES >> GO TO 3.
NO >> Go to EC-954, "Diagnosis Procedure".
3.CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal? YES >> INSPECTION END
NO >> Go to EC-954, "Diagnosis Procedure".
Diagnosis Procedure
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-954, "Component Function Check".
Which circuit is related to the incident? Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to DEF-6, "System Diagram".
>> INSPECTION END
3.CHECK HEADLAMP SYSTEM
Refer to EXL-7, "System Diagram" (XENON TYPE) or EXL-9, "System Diagram" (HALOGEN TYPE).
>> INSPECTION END
4.CHECK HEATER FAN CONTROL SYSTEM
Refer to HAC-42, "Diagnosis Procedure" (automatic air conditioner) or HAC-127, "Diagnosis Procedure" (manual air conditioner).
>> INSPECTION END
Cooling fan
Description
The ECM controls the cooling fan corresponding to the vehicle speed, engine
colant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step cont ...
Fuel injector
Description
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injector
is energized. The energized coil pulls ...
Other materials:
IPDM-E branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the IPDM E/R for damage, bend and loose
connection (unit side
and connector side).
Is the i ...
On-vehicle maintenance
ROAD WHEEL
Inspection
ALUMINUM WHEEL
1. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage. If deformed, remove
wheel and check wheel
runout.
a. Remove tire from aluminum wheel and mount on a tire balance machine.
b. Set dial indicat ...
P0182, P0183 FTT sensor
Description
The fuel tank temperature sensor is used to detect the fuel temperature
inside the fuel tank. The sensor modifies a voltage signal from
the ECM. The modified signal returns to the ECM as the fuel temperature
input. The sensor uses a thermistor which is sensitive to the
change in tem ...