Nissan Altima 2007-2012 Service Manual: ECM 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 following terminals and connectors for damage, bend and loose connection (unit side and connector side).
- ECM
- Harness connector E30
- Harness connector M1
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of ECM.
2. Check the resistance between the ECM harness connector terminals.
Is the measurement value within the specification? YES >> GO TO 3.
NO >> Repair the ECM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to the following.
• QR engine models for California: EC-144, "Diagnosis Procedure" • QR engine models expect for California: EC-673, "Diagnosis Procedure" • VQ engine models: EC-1175, "Diagnosis Procedure" Is the inspection result normal? YES (Present error)>>Replace the ECM. Refer to the following.
• QR engine models for California: EC-27, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" • QR engine models except for California: EC-563, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" • VQ engine models: EC-1051, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.
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 co ...A-BAG branch line circuit
Diagnosis Procedure 1.CHECK AIR BAG DIAGNOSIS SENSOR UNIT Check the air bag diagnosis sensor unit. Refer to SRC-3, "Work Flow". Is the inspection result normal? YES >> Replace t ...Other materials:
On-vehicle maintenance
FRONT WHEEL HUB
Inspection
• Move wheel hub and bearing assembly in the axial direction by hand. Make
sure there is no looseness of
wheel bearing.
Axial end play : 0.05 mm (0.002 in) or less
• Rotate wheel hub and make sure that is no unusual noise or other irregular
conditions. If ther ...
Floor trim
Exploded View
1. Spacer (LH)
2. Floor carpet
3. Spacer (RH)
4. Floor mat hook
Removal and Installation
REMOVAL
1. Remove the diagnosis sensor unit. Refer to SR-17, "Removal and
Installation".
2. Remove front seat (RH/LH) and rear seat cushion. Refer to SE-23, "Removal ...
ODO/TRIP meter
System Diagram
System Description
The vehicle speed signal and the memory signals from the meter memory circuit
are processed by the combination
meter and the mileage is displayed.
HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER
Refer to Owner's Manual for odo/trip meter operating instruction ...