Nissan X-Trail 32. Manual — part 1019
LOW PRESSURE FUEL PUMP
EC-1205
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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LOW PRESSURE FUEL PUMP
Component Function Check
INFOID:0000000010935912
1.
CHECK FUEL PUMP FUNCTION
1.
Turn ignition switch ON.
2.
Pinch fuel feed hose with two fingers.
NOTE:
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>>
EC-1205, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010935913
1.
CHECK FPCM POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect FPCM harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between FPCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for power supply circuit. Refer to
EC-963, "ECM : Diagnosis Proce-
.
2.
CHECK FPCM GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the continuity between FPCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit or short to power in harness or connectors.
3.
CHECK FPCM INPUT AND OUTPUT CIRCUIT
1.
Disconnect ECM harness connector.
2.
Check the continuity between FPCM harness connector and ECM harness connector.
3.
Also check harness for short to ground and to power.
+
−
Voltage
FPCM
Connector
Terminal
B132
8
Ground
Battery voltage
+
−
Continuity
FPCM
Connector
Terminal
B132
7
Ground
Existed
+
−
Continuity
FPCM
ECM
Connector
Terminal
Connector
Terminal
B133
9
E79
20
Existed
10
22
EC-1206
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
LOW PRESSURE FUEL PUMP
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK FUEL PUMP CONTROL CIRCUIT
1.
Disconnect fuel level sensor unit and fuel pump (main) harness connector.
2.
Check the continuity between FPCM harness connector and fuel level sensor unit and fuel pump (main)
harness connector.
3.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK LOW PRESSURE FUEL PUMP
EC-1206, "Component Inspection (Low Pressure Fuel Pump)"
.
Is the inspection result normal?
YES
>> Replace FPCM.
NO
>> Replace low pressure fuel pump.
Component Inspection (Low Pressure Fuel Pump)
INFOID:0000000010935914
1.
CHECK FUEL PRESSURE REGULATOR
1.
Turn ignition switch OFF.
2.
Check low fuel pressure.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK LOW PRESSURE FUEL PUMP
1.
Turn ignition switch OFF.
2.
Disconnect fuel level sensor unit and fuel pump (main).
3.
Check resistance between fuel level sensor unit and fuel pump (main) terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace fuel level sensor unit and fuel pump (main).
+
−
Continuity
FPCM
Fuel level sensor unit and fuel
pump (main)
Connector
Terminal
Connector
Terminal
B131
3
B130
1
Existed
4
4
5
3
6
2
+
−
Continuity
Fuel level sensor unit and
fuel pump (main)
Terminals
2
3
Existed
4
BRAKE SWITCH
EC-1207
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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BRAKE SWITCH
Component Function Check
INFOID:0000000010935915
1.
CHECK BRAKE SWITCH FUNCTION
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
EC-1207, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010935916
1.
CHECK BRAKE SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch harness connector.
3.
Check the voltage between stop lamp switch harness connector and ground.
M/T models
CVT models
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for power supply circuit.
2.
CHECK BRAKE SWITCH INPUT SIGNAL CIRCUIT
1.
Disconnect ECM harness connector.
2.
Check the continuity between stop lamp switch harness connector and ECM harness connector.
M/T models
ECM
Condition
Voltage
(Approx.)
Connector
+
–
Terminal
E79
16
1
Brake pedal
Slightly de-
pressed
0 V
Fully released
Battery voltage
+
−
Voltage
Stop lamp switch
Connector
Terminal
E121
3
Ground
Battery voltage
+
−
Voltage
Brake pedal position switch
Connector
Terminal
E112
1
Ground
Battery voltage
+
−
Continuity
Stop lamp switch
ECM
Connector
Terminal
Connector
Terminal
E121
4
E79
16
Existed
EC-1208
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
BRAKE SWITCH
CVT models
3.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK BRAKE SWITCH
Check the brake switch. Refer to
EC-1208, "Component Inspection (Stop Lamp Switch)"
1208, "Component Inspection (Brake Pedal Position Switch)"
(CVT models).
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-44, "Intermittent Incident"
.
NO
>> Replace stop lamp switch.
Component Inspection (Stop Lamp Switch)
INFOID:0000000010935917
1.
CHECK STOP LAMP SWITCH-1
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch harness connector.
3.
Check the continuity between stop lamp switch terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH-2
1.
Adjust stop lamp switch installation. Refer to
BR-11, "Inspection and Adjustment"
(RHD models).
2.
Check the continuity between stop lamp switch terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch.
Component Inspection (Brake Pedal Position Switch)
INFOID:0000000010935918
1.
CHECK BRAKE PEDAL POSITION SWITCH-1
1.
Turn ignition switch OFF.
+
−
Continuity
Brake pedal position switch
ECM
Connector
Terminal
Connector
Terminal
E112
2
E79
16
Existed
Stop lamp switch
Condition
Continuity
+
-
Terminals
3
4
Brake pedal
Fully released
Existed
Slightly de-
pressed
Not existed
Stop lamp switch
Condition
Continuity
+
-
Terminals
3
4
Brake pedal
Fully released
Existed
Slightly de-
pressed
Not existed
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