Nissan Altima (L32) 2007-2012 Service Manual: Symptom diagnosis
UNBALANCE STEERING WHEEL TURNING
FORCE (TORQUE VARIATION)
Description
• Hard steering when fully turning the steering wheel.
• Light steering when driving at a high speed.
Diagnosis Procedure
1.CHECK SYSTEM FOR POWER SUPPLY AND GROUND
Perform trouble diagnosis for power supply and ground circuit. Refer to
STC-6, "Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace damaged parts.
2.CHECK SYSTEM FOR VEHICLE SPEED SIGNAL
Perform trouble diagnosis for vehicle speed signal. Refer to STC-13,
"Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK SYSTEM FOR ENGINE SPEED SIGNAL
Perform trouble diagnosis for engine speed signal. Refer to STC-10,
"Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK SYSTEM FOR POWER STEERING SOLENOID VALVE
Perform trouble diagnosis for power steering solenoid valve. Refer to STC-8,
"Diagnosis Procedure".
Is the inspection result normal?
YES >> Perform the symptom diagnosis for the steering system. Refer to ST-3,
"NVH Troubleshooting
Chart".
NO >> Repair or replace damaged parts.
POWER STEERING CONTROL UNIT
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
CAUTION:
When using circuit tester or oscilloscope to measure voltage for inspection, be
sure not to extend for ...
Precautions for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT
PRE-TENSION ...
Other materials: Operating range
The Intelligent Key functions can only be
used when the Intelligent Key is within the
specified operating range.
When the Intelligent Key battery is almost
discharged or strong radio waves are present
near the operating location, the Intelligent
Key system’s operating range becomes
narrower and ...
Active noise cancellation/Active sound
enhancement (if so equipped)
Active noise cancellation
Front Microphone
This system uses microphones 1 located
inside the vehicle to detect engine booming
noise. The system then automatically generates
a noise cancelling sound through the
speakers and woofer (if so equipped) to reduce
engine booming noise.
NOTE:
To operate the ...
How to enable/disable the Steering
Assist
Steering-wheel-mounted control (left)
Vehicle information display
Steering Assist switch
Use the following methods to enable or
disable the Steering Assist.
Steering Assist switch:
To turn the Steering Assist on or off, push
the Steering Assist switch 3 on the instrument
panel.
NOTE:
When th ...
ECU diagnosis
Precaution