NISSAN X-TRAIL 2005 Service Repair Manual

DTC P0605 ECM
EC-1567
[YD (WITHOUT EURO-OBD)]
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Diagnostic ProcedureEBS01227
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 EC-1566, "
DTC Confirmation Procedure" , again.
5. Is 1st trip DTC P0605 displayed again?
Without CONSULT-II
1. Turn ignition switch ON.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory. Refer to EC-1375
.
3. Perform EC-1566, "
DTC Confirmation Procedure" , again.
4. Is DTC 0605 displayed again?
Ye s o r N o
Ye s > > G O T O 2 .
No >>INSPECTION END
2. REPLACE ECM
1. Replace ECM.
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to EC-1373,
"NATS (Nissan Anti-theft System)" .
3. Perform Fuel Pump Learning Value Clearing. Refer to EC-1370, "
Fuel Pump Learning Value Clearing" .
>>INSPECTION END

EC-1568
[YD (WITHOUT EURO-OBD)]
DTC P0606 ECM

DTC P0606 ECMPFP:23710
DescriptionEBS01228
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 LogicEBS01229
DTC Confirmation ProcedureEBS0122A
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. Wait at least 5 seconds.
4. If DTC is detected, go to EC-1569, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Turn ignition switch ON and wait 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 DTC is detected, go to EC-1569, "
Diagnostic Procedure" .
MBIB0625E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0606
0606Engine control module
(Processor)ECM calculation function is malfunctioning.

ECM
SEF817Y

DTC P0606 ECM
EC-1569
[YD (WITHOUT EURO-OBD)]
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Diagnostic ProcedureEBS0122B
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 EC-1568, "
DTC Confirmation Procedure" , again.
5. Is 1st trip DTC P0606 displayed again?
Without CONSULT-II
1. Turn ignition switch ON.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory. Refer to EC-1375
.
3. Perform EC-1568, "
DTC Confirmation Procedure" , again.
4. Is DTC 0606 displayed again?
Ye s o r N o
Ye s > > G O T O 2 .
No >>INSPECTION END
2. REPLACE ECM
1. Replace ECM.
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to EC-1373,
"NATS (Nissan Anti-theft System)" .
3. Perform “Fuel Pump Learning Value Clearing”. Refer to EC-1370, "
Fuel Pump Learning Value Clearing" .
>>INSPECTION END

EC-1570
[YD (WITHOUT EURO-OBD)]
DTC P0628, P0629 FUEL PUMP

DTC P0628, P0629 FUEL PUMPPFP:16700
DescriptionEBS0122C
To control the amount of the fuel inhalation of the fuel pump, a plunger is built into the fuel pump. When the
amount of the fuel inhalation of fuel increases, the fuel pump raises the fuel exhalation pressure. As a result,
the fuel injection pressure is raised. When the load of the engine increases, the ECM sends a signal to the fuel
pump to raise the injection pressure.
CONSULT-II Reference Value in Data Monitor ModeEBS0122D
Specification data are reference values.
On Board Diagnosis LogicEBS0122F
DTC Confirmation ProcedureEBS0122G
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. Start engine and warm it up to normal operating temperature.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Let engine idle for at least 5 seconds.
4. If DTC is detected, go to EC-1573, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Let engine idle for at least 5 seconds.
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
5. If DTC is detected, go to EC-1573, "
Diagnostic Procedure" .
MONITOR ITEM CONDITION SPECIFICATION
PUMP CURRENT

Engine: After warming up

Air conditioner switch: OFF

Shift lever: Neutral position

No-loadIdle 1,700 - 1,900 mA
2,000 rpm 1,600 - 1,800 mA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0628
0628Fuel pump control circuit
low inputECM detects a control circuit for the fuel pump is
open or short to ground.

Harness or connectors
(The fuel pump circuit is open or
shorted.)

Fuel pump P0629
0629Fuel pump control circuit
high outputECM detects a control circuit for the fuel pump is
short to power.
SEF817Y

DTC P0628, P0629 FUEL PUMP
EC-1571
[YD (WITHOUT EURO-OBD)]
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Wiring DiagramEBS0122H
TBWA0574E

EC-1572
[YD (WITHOUT EURO-OBD)]
DTC P0628, P0629 FUEL PUMP

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
10 Y/L Fuel pump power supply[Engine is running]

Warm-up condition

Idle speed0 - 12.5V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0 - 12.5V
29 L Fuel pump[Engine is running]

Warm-up condition

Idle speed0.5 - 1.0V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0.5 - 1.0V
MBIB0885E
MBIB0886E
MBIB0887E
MBIB0888E

DTC P0628, P0629 FUEL PUMP
EC-1573
[YD (WITHOUT EURO-OBD)]
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Diagnostic ProcedureEBS0122I
1. CHECK ECM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector and fuel pump harness
connector.
3. Check harness continuity between ECM terminal 10 and fuel pump terminal 2.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 2.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
2. CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 29 and fuel pump terminal 1.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK FUEL PUMP
Refer to EC-1574, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. REPLACE FUEL PUMP
1. Replace fuel pump.
2. Perform Fuel Pump Learning Value Clearing. Refer to EC-1370, "
Fuel Pump Learning Value Clearing" .
>>INSPECTION END
5. CHECK INTERMITTENT INCIDENT
Refer to EC-1414, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
PBIB1943E
Continuity should exist.
Continuity should exist.

EC-1574
[YD (WITHOUT EURO-OBD)]
DTC P0628, P0629 FUEL PUMP

Component InspectionEBS0122J
FUEL PUMP
1. Check continuity between fuel supply pump terminals 1 and 2.
2. If NG, replace fuel pump.
Removal and InstallationEBS0122K
FUEL PUMP
Refer to EM-171, "FUEL PUMP" . Continuity should exist.
SEF807Z

DTC P0642, P0643 SENSOR POWER SUPPLY
EC-1575
[YD (WITHOUT EURO-OBD)]
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DTC P0642, P0643 SENSOR POWER SUPPLYPFP:18002
On Board Diagnosis LogicEBS01FE1
The MI will not light up for these self-diagnoses.
DTC Confirmation ProcedureEBS01FE2
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. Wait at least 5 seconds.
4. If DTC is detected, go to EC-1577, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Turn ignition switch ON and wait 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 DTC is detected, go to EC-1577, "
Diagnostic Procedure" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0642
0642Sensor power supply cir-
cuit low inputECM detects a voltage of power source for sen-
sor is excessively low.

Harness or connectors
(The APP sensor 1 power supply cir-
cuit is shorted.)

Accelerator pedal position sensor
(Accelerator pedal position sensor 1) P0643
0643Sensor power supply cir-
cuit high inputECM detects a voltage of power source for Sen-
sor is excessively high.
SEF817Y

EC-1576
[YD (WITHOUT EURO-OBD)]
DTC P0642, P0643 SENSOR POWER SUPPLY

Wiring DiagramEBS01FE3
TBWA0731E