Infiniti FX35 / FX45. Manual — part 560
DTC P0550 PSP SENSOR
EC-1001
< SERVICE INFORMATION >
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3.
Check voltage between PSP sensor terminal 1 and ground with
CONSULT-III or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E306, F46
• Harness for open or short between power steering pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between PSP sensor terminal 3 and ECM terminal 67.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E306, F46
• Harness for open or short between power steering pressure sensor and ECM
>> Repair open circuit or short to ground short to power in harness or connectors.
6.
CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E306, F46
• Harness for open or short between power steering pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.
CHECK PSP SENSOR
EC-1002, "Component Inspection"
.
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
Continuity should exist.
EC-1002
< SERVICE INFORMATION >
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DTC P0550 PSP SENSOR
OK or NG
OK
>> GO TO 9.
NG
>> Replace PSP sensor.
9.
CHECK INTERMITTENT INCIDENT
>> INSPECTION END
Component Inspection
INFOID:0000000001326857
POWER STEERING PRESSURE SENSOR
1.
Reconnect all harness connectors disconnected.
2.
Start engine and let it idle.
3.
Check voltage between ECM terminal 12 and ground under the
following conditions.
Removal and Installation
INFOID:0000000001326858
POWER STEERING PRESSURE SENSOR
.
Condition
Voltage
Steering wheel: Being turned
0.5 - 4.5V
Steering wheel: Not being turned
0.4 - 0.8V
MBIB0126E
DTC P0603 ECM POWER SUPPLY
EC-1003
< SERVICE INFORMATION >
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DTC P0603 ECM POWER SUPPLY
Component Description
INFOID:0000000001326859
Battery voltage is supplied to the ECM even when the ignition switch
is turned OFF for the ECM memory function of the DTC memory, the
air-fuel ratio feedback compensation value memory, the idle air vol-
ume learning value memory, etc.
On Board Diagnosis Logic
INFOID:0000000001326860
DTC Confirmation Procedure
INFOID:0000000001326861
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.
Turn ignition switch ON and wait at least 1 second.
2.
Start engine and let it idle for 1 second.
3.
Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.
4.
Repeat steps 2 and 3 for four times.
5.
Check 1st trip DTC.
6.
If 1st trip DTC is detected, go to
EC-1005, "Diagnosis Procedure"
PBIB1164E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0603
0603
ECM power supply cir-
cuit
ECM back-up RAM system does not function
properly.
• Harness or connectors
[ECM power supply (back-up) circuit is
open or shorted.]
• ECM
EC-1004
< SERVICE INFORMATION >
[VK45DE]
DTC P0603 ECM POWER SUPPLY
Wiring Diagram
INFOID:0000000001326862
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.
TBWM1341E
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