Page 1737 of 3066
START SIGNAL
EC-623
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
START SIGNALPFP:48750
CONSULT-II Reference Value in Data Monitor ModeEBS00B9S
Specification data are reference values.
ECM Terminals and Reference ValueEBS00B9T
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.
MONITOR ITEM CONDITION SPECIFICATION
START SIGNAL
lIgnition switch: ON®START®ON OFF®ON®OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
41 B/Y Start signal[Ignition switch “ON”]Approximately 0V
[Ignition switch “START”]9-14V
Page 1738 of 3066
EC-624
[QR (WITHOUT EURO-OBD)]
START SIGNAL
Wiring Diagram
EBS00B9U
TBWA0085E
Page 1739 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual START SIGNAL
EC-625
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B9V
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 3.
2.CHECK OVERALL F NISSAN X-TRAIL 2003 Electronic Repair Manual START SIGNAL
EC-625
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B9V
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 3.
2.CHECK OVERALL F](/manual-img/5/57402/w960_57402-1738.png)
START SIGNAL
EC-625
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B9V
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 3.
2.CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “START SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
3.CHECK OVERALL FUNCTION
Wi t h ou t C O N S U LT-I I
Check voltage between ECM terminal 41 and ground under the fol-
lowing conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
4.CHECK STARTING SYSTEM
Turn ignition switch “OFF”, then turn it to “START”.
Does starter motor operate?
Ye s o r N o
Yes >>GOTO5.
No >> Refer toSC-21, "
STARTING SYSTEM".
5.CHECK FUSE
1. Turn ignition switch “OFF”.
2. Disconnect 10A fuse.
3. Check if 10A fuse is OK.
OK or NG
OK >> GO TO 6.
NG >> Replace 10A fuse.
Condition START SIGNAL
Ignition switch "ON" OFF
Ignition switch "START" ON
PBIB0182E
Condition Voltage
Ignition switch "START" Battery voltage
Other positions Approximately 0V
PBIB0583E
Page 1740 of 3066
EC-626
[QR (WITHOUT EURO-OBD)]
START SIGNAL
6.CHECK START SIGNAL INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Disconnect ignition switch harness connector.
3. Check harness continuity between ECM terminal 41 and fuse block (J/B), ignition switch and fuse block
(J/B). Refer to Wiring Diagram.
4. 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.
lHarness connectors
lFuse block (J/B) connectors M1, E102
lHarness for open or short between ignition switch and fuse block (J/B)
lHarness for open or short between ECM and fuse block (J/B)
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
Refer toEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END Continuity should exist.
Page 1741 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual FUEL PUMP CIRCUIT
EC-627
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
FUEL PUMP CIRCUITPFP:17042
DescriptionEBS00B9W
SYSTEM DESCRIPTION
The ECM activates the fuel pump for several seconds after t NISSAN X-TRAIL 2003 Electronic Repair Manual FUEL PUMP CIRCUIT
EC-627
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
FUEL PUMP CIRCUITPFP:17042
DescriptionEBS00B9W
SYSTEM DESCRIPTION
The ECM activates the fuel pump for several seconds after t](/manual-img/5/57402/w960_57402-1740.png)
FUEL PUMP CIRCUIT
EC-627
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
FUEL PUMP CIRCUITPFP:17042
DescriptionEBS00B9W
SYSTEM DESCRIPTION
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a 180°signal from the camshaft position sensor (PHASE), it knows that the
engine is rotating, and causes the pump to operate. If the 180°signal is not received when the ignition switch
is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving
safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn
controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeEBS00B9X
Specification data are reference values.
ECM Terminals and Reference ValueEBS00B9Y
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.
Sensor Input Signal to ECMECM
FunctionActuator
Crankshaft position sensor (POS) Engine speed
Fuel pump
controlFuel pump relay Camshaft position sensor (PHASE) Engine speed and cylinder number
Ignition switch Start signal
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stopped Stops in 1.5 seconds.
Except as shown aboveSto ps.
PBIB0513E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY
lFor 1 seconds after turning ignition switch ON
lEngine running or crankingON
lExcept above conditions OFF
Page 1742 of 3066
EC-628
[QR (WITHOUT EURO-OBD)]
FUEL PUMP CIRCUIT
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
29 B/P Fuel pump relay[Ignition switch “ON”]
lFor 1 seconds after turning ignition switch “ON”
[Engine is running]0-1.0V
[Ignition switch “ON”]
lMore than 1 seconds after turning ignition switch
“ON”.BATTERY VOLTAGE
(11 - 14V)
Page 1743 of 3066
FUEL PUMP CIRCUIT
EC-629
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS00B9Z
TBWA0086E
Page 1744 of 3066
EC-630
[QR (WITHOUT EURO-OBD)]
FUEL PUMP CIRCUIT
Diagnostic Procedure
EBS00BA0
1.CHECK OVERALL FUNCTION
1. Turn ignition switch “ON”.
2. Pinch fuel feed hose with two fingers.
Fuel pressure pulsation should be felt on the fuel hose for 1
second after ignition switch is turned “ON”.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2.CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect fuel pump relay.
3. Turn ignition switch “ON”.
4. Check voltage between terminals 1, 5 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
lFuse block (J/B) connector M1, B4
lHarness or connectors M17, B1
l10A fuse
l15A fuse
lHarness for open or short between fuse and fuel pump relay
>> Repair harness or connectors.
PBIB0517E
PBIB0507E
PBIB0657E