2008 NISSAN TEANA Service Manual

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Page 1697 of 5121

NISSAN TEANA 2008 Service Manual EC-236
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0550 PSP SENSOR
P0550 PSP SENSOR
DescriptionINFOID:0000000003856695
Power steering pressure (PSP) sensor is installed to the power steering high-pressur

EC-236
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0550 PSP SENSOR
P0550 PSP SENSOR
DescriptionINFOID:0000000003856695
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.
DTC LogicINFOID:0000000003856696
DTC DETECTION LOGIC
NOTE:
If DTC P0550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-243, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-236, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856697
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-37, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect power steering pressure (PSP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between PSP sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0550Power steering pressure
sensor circuitAn 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
PSP sensor
Ground Voltage
Connector Terminal
F62 3 Ground Approx. 5 V

Page 1698 of 5121

NISSAN TEANA 2008 Service Manual P0550 PSP SENSOR
EC-237
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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3.CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harn

Page 1699 of 5121

NISSAN TEANA 2008 Service Manual EC-238
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0603 ECM POWER SUPPLY
P0603 ECM POWER SUPPLY
DescriptionINFOID:0000000003856699
Battery voltage is supplied to the ECM even when the ignition switch
is

Page 1700 of 5121

NISSAN TEANA 2008 Service Manual P0603 ECM POWER SUPPLY
EC-239
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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2.DETECT MALFUNCTIONING PART
Check the following.
15A fuse (No.50)
IPDM E/R harness connector

Page 1701 of 5121

NISSAN TEANA 2008 Service Manual EC-240
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0605 ECM
P0605 ECM
DescriptionINFOID:0000000003856702
The ECM consists of a microcomputer and connectors for signal
input and output and for power suppl

Page 1702 of 5121

NISSAN TEANA 2008 Service Manual P0605 ECM
EC-241
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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Diagnosis ProcedureINFOID:0000000003856704
1.INSPECTION START
1. Turn ignition switch ON.
2. Erase DTC.
3. Perf

Page 1703 of 5121

NISSAN TEANA 2008 Service Manual EC-242
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0607 ECM
P0607 ECM
DescriptionINFOID:0000000003856705
CAN (Controller Area Network) is a serial communication line for real time application. It is an o

Page 1704 of 5121

NISSAN TEANA 2008 Service Manual P0643 SENSOR POWER SUPPLY
EC-243
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P0643 SENSOR POWER SUPPLY
DTC LogicINFOID:0000000003856708
DTC DETECTION LOGIC
DTC CONFIRMATION

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