Infiniti FX35 / FX45. Manual — part 559
DTC P0507 ISC SYSTEM
EC-997
< SERVICE INFORMATION >
[VK45DE]
C
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EC
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2.
Replace ECM.
3.
Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to
BL-187, "ECM Re-Communicating Function"
4.
5.
EC-662, "Accelerator Pedal Released Position Learning"
.
6.
EC-663, "Throttle Valve Closed Position Learning"
7.
EC-663, "Idle Air Volume Learning"
.
>> INSPECTION END
EC-998
< SERVICE INFORMATION >
[VK45DE]
DTC P0550 PSP SENSOR
DTC P0550 PSP SENSOR
Component Description
INFOID:0000000001326851
Power steering pressure (PSP) sensor is installed to the power
steering high-pressure tube and detects a power steering load. This
sensor is a potentiometer which transforms the power steering load
into output voltage, and emits the voltage signal to the ECM. The
ECM controls the electric throttle control actuator and adjusts the
throttle valve opening angle to increase the engine speed and
adjusts the idle speed for the increased load.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001326852
Specification data are reference values.
On Board Diagnosis Logic
INFOID:0000000001326853
The MIL will not light up for this diagnosis.
NOTE:
If DTC P0550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
.
DTC Confirmation Procedure
INFOID:0000000001326854
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
1.
Start engine and let it idle for at least 5 seconds.
2.
Check 1st trip DTC.
3.
If 1st trip DTC is detected, go to
EC-1000, "Diagnosis Procedure"
PBIB1484E
MONITOR ITEM
CONDITION
SPECIFICATION
PW/ST SIGNAL
• Engine: After warming up, idle the
engine
Steering wheel: Not being turned
OFF
Steering wheel: Being turned
ON
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0550
0550
Power steering pressure
sensor circuit
An excessively low or high voltage from the
sensor is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted)
• Power steering pressure sensor
DTC P0550 PSP SENSOR
EC-999
< SERVICE INFORMATION >
[VK45DE]
C
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EC
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Wiring Diagram
INFOID:0000000001326855
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TBWM0249E
EC-1000
< SERVICE INFORMATION >
[VK45DE]
DTC P0550 PSP SENSOR
Diagnosis Procedure
INFOID:0000000001326856
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect PSP sensor harness connector.
2.
Turn ignition switch ON.
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
12
R/G
Power steering pressure
sensor
[Engine is running]
• Steering wheel: Being turned
0.5 - 4.5V
[Engine is running]
• Steering wheel: Not being turned
0.4 - 0.8V
67
B/W
Sensor ground
[Engine is running]
• Warm-up condition
• Idle speed
Approximately 0V
68
SB
Sensor power supply
(Power steering pressure
sensor)
[Ignition switch: ON]
Approximately 5V
PBIB2195E
PBIB1484E
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