Nissan Altima (L32) 2007-2012 Service Manual: Symptom diagnosis
SRS AIR BAG SYSTEM
"AIR BAG" Warning Lamp Does Not Turn Off
DIAGNOSTIC PROCEDURE 7
1.CHECK CONDITION OF AIR BAG MODULE
Inspect for any deployed air bag modules or seat belt pre-tensioners.
Are any air bag modules or seat belt pre-tensioners deployed? YES >> Refer to SR-20, "For Frontal Collision" or SR-21, "For Side and Rollover Collision".
NO >> GO TO 2
2.CHECK THE AIR BAG FUSE
Check 10A fuse [No. 2, located in the fuse block (J/B)].
Is the fuse blown? YES >> GO TO 3
NO >> GO TO 4
3.CHECK AIR BAG FUSE AGAIN
Replace 10A fuse [No. 2, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again? YES >> Replace harness.
NO >> Inspection End.
4.CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Connect CONSULT-III.
Is “AIR BAG” displayed on CONSULT-III? YES >> GO TO 5
NO >> Visually inspect the air bag diagnosis sensor unit harness connections. If the connections are OK, replace the air bag diagnosis sensor unit. Refer to SR-17, "Removal and Installation".
5.CHECK HARNESS CONNECTION
Check for loose connections between the combination meter and the air bag diagnosis sensor unit.
Are there any loose connections? YES >> Properly connect the combination meter and air bag diagnosis sensor unit harness connectors. If “AIR BAG” warning lamp still does not turn off, replace the wiring harness.
NO >> Replace air bag diagnosis sensor unit.
"AIR BAG" Warning Lamp Does Not Turn On
DIAGNOSTIC PROCEDURE 8
1.CHECK METER FUSE
Check the 10A fuse [No. 4, located in the fuse block (J/B)] .
Is the fuse blown? YES >> GO TO 2
NO >> GO TO 3
2.REPLACE METER FUSE AND CHECK AGAIN
Replace 10A fuse [No. 4, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again? YES >> Replace harness.
NO >> Inspection End.
3.CHECK HARNESS CONNECTIONS BETWEEN AIR BAG DIAGNOSIS SENSOR UNIT AND COMBINA TION METER
Inspect the harness and connectors between the air bag diagnosis sensor unit and the combination meter.
Do the harness or connectors have any visible damage? YES >> Replace harness.
NO >> GO TO 4
4.CHECK COMBINATION METER
Disconnect the air bag diagnosis sensor unit harness connectors and turn ignition switch ON.
Does “AIR BAG” warning lamp turn on? YES >> Replace the air bag diagnosis sensor unit. Refer to SR-17, "Removal and Installation".
NO >> Replace the combination meter. Refer to MWI-176, "Removal and Installation".
PASSENGER SEAT BELT WARNING SYSTEM
Seat Belt Warning System Does Not Function
1.SEAT BELT WARNING LIGHT
Turn ignition switch ON.
Does the seat belt warning lamp come ON? YES >> GO TO 2 NO >> • Check 10A fuse [No. 4, located in the fuse block (J/B)].
• Check seat belt buckle switch LH.
• Check harness between combination meter and seat belt buckle switch LH.
• Check combination meter. Refer to MWI-94, "Fail Safe".
2.SEAT BELT BUCKLE LH
Fasten the seat belt buckle LH.
Does the seat belt warning lamp go OFF? YES >> GO TO 3
NO >> • Check seat belt buckle switch LH.
• Check harness between combination meter and seat belt buckle switch LH.
3.OCCUPANT CLASSIFICATION SYSTEM
Have a helper sit in the passenger seat.
Does the seat belt warning lamp go ON? YES >> GO TO 4
NO >> • Check occupant classification system. Refer to SRC-10, "Occupant Classification System (OCS)".
• Check harness between occupant classification control unit and air bag diagnosis sensor unit.
4.SEAT BELT BUCKLE RH
Fasten the seat belt buckle RH.
Does the seat belt warning lamp go OFF? YES >> System OK.
NO >> • Check seat belt buckle switch RH.
• Check harness between seat belt buckle switch RH and air bag diagnosis sensor unit.
• Replace air bag diagnosis sensor unit. Refer to SR-17, "Removal and Installation".
Ecu diagnosis
DIAGNOSIS SENSOR UNIT Wiring Diagram Trouble Diagnosis with CONSULT-III DIAGNOSTIC CODE CHART NOTE: Follow the procedures in numerical order when repairing malfunctioning pa ...Precaution
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P0116 ect sensor
Description
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change i ...
Main line between dlc and abs 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 following terminals and connectors for damage, bend and loose
connection (connector side
and harness side).
- Harness co ...
Compression pressure
CHECKING COMPRESSION PRESSURE
1. Warm up the engine to full operating temperature.
2. Release the fuel pressure. Refer to EC-550, "Inspection" (California),
EC-1038, "Inspection" (Except California).
3. Remove the ignition coil and spark plug from each cylinder.
Refer ...