2005 NISSAN X-TRAIL Injectors

EC-986
[YD (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM

System ChartEBS0116V
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
Fuel Injection Control SystemEBS0116W
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is adjusted to improve engine performance.
Pulse signals are sent to fuel injectors according to the input signals to adjust the amount of fuel injected to
preset value.
START CONTROL
Input/Output Signal Chart
When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed, engine
coolant temperature and fuel rail pressure.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches the specific value, and shifts the control to the normal or idle
control.
Input (Sensor) ECM Function Output (Actuator)

Accelerator pedal position sensor

Fuel rail pressure sensor

Fuel pump temperature sensor

Engine coolant temperature sensor

Mass air flow sensor

Intake air temperature sensor

Crankshaft position sensor

Camshaft position sensor

Turbocharger boost sensor

Vehicle speed sensor*1

ESP/TCS/ABS control unit*1

Ignition switch

Stop lamp switch

Air conditioner switch*1

Park/neutral position switch

Battery voltage

Fuel level switch

Power steering pressure switch Fuel injection control Fuel injector and Fuel pump
Fuel injection timing control Fuel injector and Fuel pump
Fuel cut control Fuel injector and Fuel pump
Glow control system
Glow relay and glow indicator lamp*
2
On board diagnostic system
Malfunction indicator (MI)*2
EGR volume control EGR volume control valve
Cooling fan control Cooling fan relay
Turbocharger boost controlTurbocharger boost control solenoid
valve
Fuel transport pump control Fuel transport pump relay
Air conditioning cut control Air conditioner relay
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)Fuel injector
Fuel pump Crankshaft position sensor Engine speed
Camshaft position sensor Piston position
Ignition switch Start signal
Fuel rail pressure sensor Fuel rail pressure
SEF648S

EC-988
[YD (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM

DECELERATION CONTROL
Input/Output Signal Chart
The ECM sends a fuel cut signal to the fuel injectors and fuel pump during deceleration for better fuel effi-
ciency. The ECM determines the time of deceleration according to signals from the accelerator pedal position
sensor and crankshaft position sensor.
Fuel Injection Timing Control SystemEBS0116X
DESCRIPTION
The target fuel injection timing in accordance with the engine speed and the fuel injection amount are recorded
as a map in the ECM beforehand. The ECM determines the optimum injection timing using sensor signals
accordance with the map.
Air Conditioning Cut ControlEBS0116Y
INPUT / OUTPUT SIGNAL CHART
*: The input signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
This system improves acceleration when the air conditioner is used.
When the accelerator pedal is fully depressed, the air conditioner is turned off for a few seconds.
When engine coolant temperature becomes excessively high, the air conditioner is turned off. This continues
until the engine coolant temperature returns to normal.
Fuel Cut Control (At No Load & High Engine Speed)EBS0116Z
INPUT/OUTPUT SIGNAL CHART
*: The input signal is sent to the ECM through CAN communication line.
If the engine speed is above 2,800 rpm under no load (for example, the shift position is neutral and engine
speed is over 2,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
based on engine speed. Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will
be cancelled.
NOTE:
This function is different from deceleration control listed under EC-986, "
Fuel Injection Control Sys-
tem" .
Sensor Input Signal to ECM ECM Function Actuator
Accelerator pedal position sensor Accelerator pedal position Fuel injection
control (Decel-
eration control)Fuel injector
Fuel pump
Crankshaft position sensor Engine speed
Sensor Input Signal to ECM ECM Function Actuator
Air conditioner switch* Air conditioner ON signal
Air conditioner
cut controlAir conditioner relay Accelerator pedal position sensor Accelerator pedal opening angle
Vehicle speed sensor* Vehicle speed
Engine coolant temperature sensor Engine coolant temperature
Sensor Input Signal to ECM ECM Function Actuator
Vehicle speed sensor* Vehicle speed
Fuel cut control Fuel injector Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor Engine speed

DTC P0201 - P0204 FUEL INJECTOR
EC-1123
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

4. CHECK FUEL INJECTOR-II
With CONSULT-II
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Select “SELF DIAG RESULTS” mode with CONSULT-II.
6. Touch “ERASE”.
7. Perform E C - 111 9 , "
DTC Confirmation Procedure" .
8. Is another DTC displayed?
With GST
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Select Service $04 with GST.
6. Touch “ERASE”.
7. Perform E C - 111 9 , "
DTC Confirmation Procedure" .
8. Is another DTC displayed?
Ye s o r N o
Yes >> Replace fuel injector of malfunctioning cylinder.
No >> GO TO 5.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-1045, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0119W
FUEL INJECTOR
1. Disconnect fuel injector.
2. Check continuity between terminals as shown in the figure.
3. If NG, replace fuel injector.
Removal and InstallationEBS0119X
FUEL INJECTOR
Refer to EM-167, "INJECTION TUBE AND FUEL INJECTOR" .
Continuity should exist.
PBIB0406E

EC-1262
[YD (WITH EURO-OBD)]
DTC P1268 - P1271 FUEL INJECTOR

4. CHECK FUEL INJECTOR-II
With CONSULT-II
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Select “SELF DIAG RESULTS” mode with CONSULT-II.
6. Touch “ERASE”.
7. Perform EC-1258, "
DTC Confirmation Procedure" .
8. Is another DTC displayed?
With GST
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Select Service $04 with GST.
6. Touch “ERASE”.
7. Perform EC-1258, "
DTC Confirmation Procedure" .
8. Is another DTC displayed?
Ye s o r N o
Yes >> Replace fuel injector of malfunctioning cylinder.
No >> GO TO 5.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-1045, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS011DN
FUEL INJECTOR
1. Disconnect fuel injector.
2. Check continuity between terminals as shown in the figure.
3. If NG, replace fuel injector.
Removal and InstallationEBS011DO
FUEL INJECTOR
Refer to EM-167, "INJECTION TUBE AND FUEL INJECTOR" .
Continuity should exist.
PBIB0406E

EC-1362
[YD (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

System ChartEBS011WZ
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
Fuel Injection Control SystemEBS011X0
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is adjusted to improve engine performance.
Pulse signals are sent to fuel injectors according to the input signals to adjust the amount of fuel injected to
preset value.
START CONTROL
Input/Output Signal Chart
When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed, engine
coolant temperature and fuel rail pressure.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches the specific value, and shifts the control to the normal or idle
control.
Input (Sensor) ECM Function Output (Actuator)

Accelerator pedal position sensor

Fuel rail pressure sensor

Fuel pump temperature sensor

Engine coolant temperature sensor

Mass air flow sensor

Intake air temperature sensor

Crankshaft position sensor

Camshaft position sensor

Turbocharger boost sensor

Vehicle speed sensor*1

ESP/TCS/ABS control unit*1

Ignition switch

Stop lamp switch

Air conditioner switch*1

Park/neutral position switch

Battery voltage

Fuel level switch

Power steering pressure switch Fuel injection control Fuel injector and Fuel pump
Fuel injection timing control Fuel injector and Fuel pump
Fuel cut control Fuel injector and Fuel pump
Glow control system
Glow relay and glow indicator lamp*
2
On board diagnostic system
Malfunction indicator (MI)*2
EGR volume control EGR volume control valve
Cooling fan control Cooling fan relay
Turbocharger boost controlTurbocharger boost control solenoid
valve
Fuel transport pump control Fuel transport pump relay
Air conditioning cut control Air conditioner relay
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)Fuel injector
Fuel pump Crankshaft position sensor Engine speed
Camshaft position sensor Piston position
Ignition switch Start signal
Fuel rail pressure sensor Fuel rail pressure
SEF648S

EC-1364
[YD (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

DECELERATION CONTROL
Input/Output Signal Chart
The ECM sends a fuel cut signal to the fuel injectors and fuel pump during deceleration for better fuel effi-
ciency. The ECM determines the time of deceleration according to signals from the accelerator pedal position
sensor and crankshaft position sensor.
Fuel Injection Timing Control SystemEBS011X1
DESCRIPTION
The target fuel injection timing in accordance with the engine speed and the fuel injection amount are recorded
as a map in the ECM beforehand. The ECM determines the optimum injection timing using sensor signals
accordance with the map.
Air Conditioning Cut ControlEBS011X2
INPUT / OUTPUT SIGNAL CHART
*: The input signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
This system improves acceleration when the air conditioner is used.
When the accelerator pedal is fully depressed, the air conditioner is turned off for a few seconds.
When engine coolant temperature becomes excessively high, the air conditioner is turned off. This continues
until the engine coolant temperature returns to normal.
Fuel Cut Control (At No Load & High Engine Speed)EBS011X3
INPUT/OUTPUT SIGNAL CHART
*: The input signal is sent to the ECM through CAN communication line.
If the engine speed is above 2,800 rpm under no load (for example, the shift position is neutral and engine
speed is over 2,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
based on engine speed. Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will
be cancelled.
NOTE:
This function is different from deceleration control listed under EC-1362, "
Fuel Injection Control Sys-
tem" .
Sensor Input Signal to ECM ECM Function Actuator
Accelerator pedal position sensor Accelerator pedal position Fuel injection
control (Decel-
eration control)Fuel injector
Fuel pump
Crankshaft position sensor Engine speed
Sensor Input Signal to ECM ECM Function Actuator
Air conditioner switch* Air conditioner ON signal
Air conditioner
cut controlAir conditioner relay Accelerator pedal position sensor Accelerator pedal opening angle
Vehicle speed sensor* Vehicle speed
Engine coolant temperature sensor Engine coolant temperature
Sensor Input Signal to ECM ECM Function Actuator
Vehicle speed sensor* Vehicle speed
Fuel cut control Fuel injector Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor Engine speed

DTC P0201 - P0204 FUEL INJECTOR
EC-1479
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

4. CHECK FUEL INJECTOR-II
With CONSULT-II
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Select “SELF DIAG RESULTS” mode with CONSULT-II.
6. Touch “ERASE”.
7. Perform DTC Confirmation Procedure, EC-1475, "
DTC Confirmation Procedure" .
8. Is another DTC displayed?
Without CONSULT-II
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory. Refer to EC-1375
.
6. Perform DTC Confirmation Procedure, EC-1475, "
DTC Confirmation Procedure" .
7. Is another DTC displayed?
Ye s o r N o
OK >> Replace fuel injector or malfunctioning cylinder.
NG >> GO TO 5.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-1414, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS01203
FUEL INJECTOR
1. Disconnect fuel injector.
2. Check continuity between terminals as shown in the figure.
3. If NG, replace fuel injector.
Removal and InstallationEBS01204
FUEL INJECTOR
Refer to EM-167, "INJECTION TUBE AND FUEL INJECTOR" .
Continuity should exist.
PBIB0406E

DTC P1268 - P1271 FUEL INJECTOR
EC-1601
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

4. CHECK FUEL INJECTOR-II
With CONSULT-II
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Select “SELF DIAG RESULTS” mode with CONSULT-II.
6. Touch “ERASE”.
7. Perform DTC Confirmation Procedure, EC-1597, "
DTC Confirmation Procedure" .
8. Is another DTC displayed?
Without CONSULT-II
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector and fuel injector harness connector.
4. Turn ignition switch ON.
5. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory. Refer to EC-1375
.
6. Perform DTC Confirmation Procedure, EC-1597, "
DTC Confirmation Procedure" .
7. Is another DTC displayed?
Ye s o r N o
OK >> Replace fuel injector or malfunctioning cylinder.
NG >> GO TO 5.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-1414, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS01274
FUEL INJECTOR
1. Disconnect fuel injector.
2. Check continuity between terminals as shown in the figure.
3. If NG, replace fuel injector.
Removal and InstallationEBS01275
FUEL INJECTOR
Refer to EM-167, "INJECTION TUBE AND FUEL INJECTOR" .
Continuity should exist.
PBIB0406E