Nissan Altima (L32) 2007-2012 Service Manual: Engine speed signal circuit
Description
• ECM sends engine speed signal to power steering control unit.
Diagnosis Procedure
1.PERFORM ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis.
Is any error system detected? YES >> Check the error system.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT
1. Turn the ignition switch OFF.
2. Disconnect ECM harness connector E10.
3. Disconnect power steering control unit harness connector.
4. Check continuity between ECM harness connector E10 (A) terminal 94 and power steering control unit harness connector M59 (B) terminal 10.
Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK ENGINE SPEED SIGNAL (ECM SIDE)
1. Turn the ignition switch OFF.
2. Connect ECM harness connector.
3. Check signal between ECM harness connector E10 terminal 94 and ground with oscilloscope.
Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 4.
NO >> Replace ECM. Refer to EC-34, "Component Parts Location" (QR25DE for California), EC-570, "Component Parts Location" (QR25DE except for California), EC-1058, "Component Parts Location" (VQ35DE).
4.CHECK ENGINE SPEED SIGNAL (POWER STEERING CONTROL UNIT SIDE)
1. Turn the ignition switch OFF.
2. Connect power steering control unit harness connector.
3. Check signal between power steering control unit harness connector M59 terminal 10 and ground with oscilloscope.
Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 5.
NO >> Replace power steering control unit.
5.CHECK TERMINALS AND HARNESS CONNECTORS
• Check power steering control unit pin terminals for damage or loose connection with harness connector.
• Check ECM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal? YES >> Inspection End
NO >> Repair or replace damaged parts.
Power steering solenoid valve
Description • Power steering solenoid valve controls the power steering oil pressure in the gear housing assembly. Diagnosis Procedure 1.CHECK POWER STEERING SOLENOID VALVE SIGNAL 1. Start e ...Vehicle speed signal circuit
Description • Combination meter sends vehicle speed signal to power steering control unit. Diagnosis Procedure 1.PERFORM COMBINATION METER SELF-DIAGNOSIS Perform combination meter self-diagno ...Other materials:
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 ...
Changing wheels and tires
Tire rotation
NISSAN recommends rotating the tires
every 7,500 miles (12,000 km).
See “Flat tire” in the “In case of emergency”
section of this manual for tire replacing
procedures.
As soon as possible, tighten the
wheel nuts to the specified torque
with a torque wrench.
Wheel ...
Automatic Emergency Braking (AEB) with
Pedestrian Detection
WARNING
Failure to follow the warnings and instructions
for proper use of the AEB
with Pedestrian Detection system
could result in serious injury or death.
The AEB with Pedestrian Detection
system is a supplemental aid to the
driver. It is not a replacement for the
driver’s attention to traff ...