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 via the CAN communication.
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-1478, "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-1478, "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-1478, "Diagnosis Procedure".
Diagnosis Procedure
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-1478, "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-3, "Work Flow".
>> INSPECTION END
3.CHECK HEADLAMP SYSTEM
Refer to EXL-4, "Work Flow".
>> INSPECTION END
4.CHECK HEATER FAN CONTROL SYSTEM
Refer to HAC-4, "Work Flow" (automatic air conditioner) or HAC-101, "Work Flow" (manual air conditioner).
>> INSPECTION END
Cooling fan
Description The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 4-step cont ...Electronic controlled engine mount
Description The electronic controlled engine mount control solenoid valve controls the intake manifold vacuum signal for electronic controlled engine mount. The electronic controlled engine mount ...Other materials:
B2612 Steering status
Description
There are 2 switches in the electronic steering column lock. IPDM E/R
compares those 2 switches conditions
to judge the present steering status and transmit the result to BCM via CAN
communication.
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2612 is displayed with DTC U10 ...
P0776 pressure control solenoid B
performance (sec pressure solenoid
valve)
Description
The pressure control solenoid valve B (secondary pressure solenoid valve)
regulates the secondary pressure
to suit the driving condition in response to a signal sent from the TCM.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe ...
P2118 throttle control motor
Description
The throttle control motor is operated by the ECM and it opens and closes the
throttle valve.
The current opening angle of the throttle valve is detected by the throttle
position sensor and it provides feedback
to the ECM to control the throttle control motor to make the thrott ...