Nissan Altima 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.
ECU diagnosis
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 ...
Precaution
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:
High-pressure pipe
Removal and Installation for High-Pressure Pipe
QR25DE
Removal
1. Discharge the refrigerant. Refer to HA-24, "HFC-134a (R-134a) Service
Procedure".
2. Remove the strut tower bar. Refer to FSU-12, "Exploded View".
3. Remove the upper cowl. Refer to EXT-18, "Remova ...
P0845 transmission fluid pressure
sensor B (pri pressure sensor)
Description
The transmission fluid pressure sensor B (primary pressure sensor) detects
primary pressure of CVT and
sends TCM the signal.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn
igniti ...
B261A push-button ignition switch
Description
IPDM E/R transmits the push-button ignition switch status via CAN
communication to BCM. BCM receives
push-button ignition switch status by hardwire input. BCM compares the 2 signals
for mismatch.
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B261A is displayed with DTC U1000, ...