NISSAN X-TRAIL 2003 Electronic Repair Manual

DTC P0500 VSS
EC-517
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Diagnostic ProcedureEBS00BI4
1.CHECK DTC WITH ESP/TCS/ABS CONTROL UNIT, 4WD/ABS CONTROL UNIT
Check DTC with ESP/TCS/ABS control unit (with ESP models), 4WD/ABS control unit (without ESP models).
Refer toBRC-60
orBRC-7.
OK or NG
OK >> GO TO 2.
NG >> Perform trouble shooting relevant to DTC indicated.
2.CHECK COMBINATION METER
Check combination meter function.
Refer toDI-10, "
Meter/Gauge Operation and Odo/Trip Meter Segment Check in Diagnosis Mode"(LHD mod-
els),DI-28, "
Meter/Gauge Operation and Odo/Trip Meter Segment Check in Diagnosis Mode"(RHD models).
OK or NG
OK >> GO TO 3.
NG >> Perform trouble shooting relevant to combination meter.
3.CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch "OFF".
2. Disconnect ECM harness connector and combination meter harness connector.
3. Check harness continuity between ECM terminal 81 and combination meter terminal 49 (LHD models), 62
(RHD models).
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
lHarness connectors M62, F42
lHarness for open or short between ECM and combination meter
>> Repair harness or connectors.
5.CHECK INTERMITTENT INCIDENT
PerformEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END Continuity should exist.

EC-518
[QR (WITHOUT EURO-OBD)]
DTC P0550 PSP SENSOR
DTC P0550 PSP SENSOR
PFP:49763
Component DescriptionEBS00BI5
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-II Reference Value in Data Monitor ModeEBS00BI6
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BI7
Specification data are reference values and are measured between each terminal and body 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.
On Board Diagnosis LogicEBS00BI8
DTC Confirmation ProcedureEBS00BI9
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.
WITH CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and let it idle for at least 5 seconds.
PBIB0502E
MONITOR ITEM CONDITION SPECIFICATION
PW/ST SIGNAL
lEngine: After warming up, idle
the engineSteering wheel is in neutral position.
(Forward direction)OFF
Steering wheel is turned. ON
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
65 R Sensor's power supply[Ignition switch “ON”]Approximately 5V
67 PPower steering pres-
sure sensor[Engine is running]
lSteering wheel is being turned.0.5 - 4.0V
[Engine is running]
lSteering wheel is not being turned.0.4 - 0.8V
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0550
0550Power steering pres-
sure sensor circuitAn excessively low or high voltage from the
sensor is sent to ECM.
lHarness or connectors
(The sensor circuit is open or shorted)
lPower steering pressure sensor

DTC P0550 PSP SENSOR
EC-519
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4. If 1st trip DTC is detected, go toEC-521, "Diagnostic Procedure".
WITHOUT CONSULT-II
1. Start engine and let it idle for at least 5 seconds.
2. Turn ignition switch "OFF", wait at least 10 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
4. If 1st trip DTC is detected, go toEC-521, "
Diagnostic Procedure".

EC-520
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DTC P0550 PSP SENSOR
Wiring Diagram
EBS00BIA
TBWA0087E

DTC P0550 PSP SENSOR
EC-521
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Diagnostic ProcedureEBS00BIB
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 2.
2.CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect PSP sensor harness connector.
2. Turn ignition switch "ON".
3. Check voltage between PSP sensor terminal 3 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connectors.
3.CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between PSP sensor terminal 1 and engine ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connectors.
PBIB0494E
PBIB0502E
Voltage: Approximately 5V
SEF509Y
Continuity should exist.

EC-522
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DTC P0550 PSP SENSOR
4.CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 67 and PSP sensor terminal 2.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connectors.
5.CHECK PSP SENSOR
Refer toEC-522, "
Component Inspection".
OK or NG
OK >> GO TO 6.
NG >> Replace PSP sensor.
6.CHECK INTERMITTENT INCIDENT
Refer toEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS00BIC
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 67 and ground under the
following conditions.Continuity should exist.
Condition Voltage
Steering wheel is being turned fully. Approximately 3.6V
Steering wheel is not being turned. Approximately 0.6V
PBIB0570E

DTC P0605 ECM
EC-523
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DTC P0605 ECMPFP:23710
Component DescriptionEBS00BID
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
On Board Diagnosis LogicEBS00BIE
FAI L-S AFE MO DE
ECM enters fail-safe mode when malfunction A is detected.
DTC Confirmation ProcedureEBS00BIF
Perform "PROCEDURE FOR MALFUNCTION A" first. If the 1st trip DTC cannot be confirmed, perform "
PROCEDURE FOR MALFUNCTION B". If there is no problem on "PROCEDURE FOR MALFUNCTION
B", perform "PROCEDURE FOR MALFUNCTION C".
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.
PROCEDURE FOR MALFUNCTION A
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If 1st trip DTC is detected, go toEC-525, "
Diagnostic Procedure"
.
Without CONSULT-II
1. Turn ignition switch "ON".
2. Turn ignition switch "OFF", wait at least 10 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
4. If 1st trip DTC is detected, go toEC-525, "
Diagnostic Procedure".
SEF093X
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0605
0605Engine control moduleA) ECM calculation function is malfunctioning.
lECM B) ECM EEP-ROM system is malfunctioning.
C) ECM self shut-off function is malfunctioning.
Detected items Engine operation condition in fail-safe mode
Malfunction AECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5
degrees) by the return spring.
SEF058Y

EC-524
[QR (WITHOUT EURO-OBD)]
DTC P0605 ECM
PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch "OFF", wait at least 10 seconds, and then
turn "ON".
4. If 1st trip DTC is detected, go toEC-525, "
Diagnostic Procedure"
.
Without CONSULT-II
1. Turn ignition switch "ON" and wait at least 1 second.
2. Turn ignition switch OFF", wait at least 10 seconds, and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
4. If 1st trip DTC is detected, go toEC-525, "
Diagnostic Procedure".
PROCEDURE FOR MALFUNCTION C
With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch "OFF", wait at least 10 seconds, and then
turn "ON".
4. Repeat step 3 procedure, 32 times.
5. If 1st trip DTC is detected, go toEC-525, "
Diagnostic Procedure"
.
Without CONSULT-II
1. Turn ignition switch "ON" and wait at least 1 second.
2. Turn ignition switch "OFF", wait at least 10 seconds, and then turn "ON".
3. Repeat step 2 procedure, 32 times.
4. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
5. If 1st trip DTC is detected, go toEC-525, "
Diagnostic Procedure".
SEF058Y
SEF058Y

DTC P0605 ECM
EC-525
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Diagnostic ProcedureEBS00BIG
1.INSPECTION START
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4.Perform “DTC Confirmation Procedure”.
SeeEC-523
.
5. Is the 1st trip DTC P0605 displayed again?
Wi t h ou t C O N S U LT-I I
1. Turn ignition switch “ON”.
2. Erase the "Diagnostic Test Mode II (Self-diagnostic results)" memory. Refer toEC-403, "
How to Erase
DTC ( Without CONSULT-II)".
3.Perform “DTC Confirmation Procedure”.
SeeEC-523
.
4. Is the 1st trip DTC P0605 displayed again?
Ye s o r N o
Yes >>GOTO2.
No >>INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer toEC-403,
"NATS (Nissan Anti-theft System)".
3. PerformEC-396, "
Accelerator Pedal Released Position Learning".
4. PerformEC-396, "
Throttle Valve Closed Position Learning".
5. PerformEC-396, "
Idle Air Volume Learning".
>>INSPECTION END

EC-526
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DTC P0650 MI
DTC P0650 MI
PFP:24810
Component DescriptionEBS00BIH
Malfunction Indicator (MI) is located on the instrument panel. When the ignition switch is turned ON without
engine running, MI will light up. This is a bulb check. When the engine is started, MI should go off. If MI
remains on, the on board diagnostic system has detected an engine system malfunction.
On Board Diagnosis LogicEBS00BII
FAIL -S AFE M OD E
ECM enters in fail-safe mode when both DTC P0650 and another DTC, which calls for MI to light up, are
detected at the same time.
DTC Confirmation ProcedureEBS00BIJ
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.
WITH CONSULT-II
1. Turn ignition switch "ON" and wait at least 1 second.
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go toEC-528, "
Diagnostic Procedure".
Overall Function CheckEBS00BOZ
Use this procedure to check the overall function of the mass air flow sensor circuit. During this check, a 1st trip
DTC might not be confirmed.
WITHOUT CONSULT-II
1. Turn ignition switch "ON".
2. Check that the MI is illuminated.
3. If NG, go toEC-528, "
Diagnostic Procedure".
IfOK,gotonextstep.
4. Start engine.
5. Check that the MI is not illuminated.
6. If NG, go toEC-528, "
Diagnostic Procedure".
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0650
0650Malfunction indicator
(MI) control circuit
lAn excessively high voltage is sent to ECM
through the MI circuit under the condition
that calls for MI light up.
lAn excessively low voltage is sent to ECM
through the MI circuit under the condition
that calls for MI not to light up.
lHarness or connectors
(MI circuit is open or shorted.)
lMI
Detected items Engine operating condition in fail-safe mode
MI circuit Engine speed will not rise more than 2,500 rpm due to the fuel cut
SEF058Y