Nissan Qashqai J11. Manual — part 351
HIGH PRESSURE FUEL PUMP
ECM-381
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
YES
>> GO TO 8.
NO
>> GO TO 2.
2.
CHECK HIGH PRESSURE FUEL PUMP POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect high pressure fuel pump relay harness connector.
4.
Check the continuity between ECM harness connector and high pressure fuel pump relay harness con-
nector.
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning part.
3.
CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (CONTACT SIDE)
Check the voltage between high pressure fuel pump relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform the trouble diagnosis for power supply circuit.
4.
CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (EXCITATION COIL SIDE)
1.
Install all removed parts.
2.
Turn ignition switch ON.
3.
Check the voltage between high pressure fuel pump relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY CIRCUIT (EXCITATION COIL SIDE)
1.
Turn ignition switch OFF.
2.
Disconnect high pressure fuel pump relay harness connector.
3.
Disconnect IPDM E/R harness connector.
4.
Check the continuity between IPDM E/R harness connector and high pressure fuel pump relay harness
connector.
+
−
Continuity
ECM
High pressure fuel pump relay
Connector
Terminal
Connector
Terminal
F16
50
F161
5
Existed
+
−
Voltage
High pressure fuel pump relay
Connector
Terminal
F161
3
Ground
Battery voltage
+
−
Voltage
High pressure fuel pump relay
Connector
Terminal
F161
1
Ground
Battery voltage
ECM-382
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
HIGH PRESSURE FUEL PUMP
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
6.
CHECK HIGH PRESSURE FUEL PUMP RELAY GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect high pressure fuel pump relay harness connector.
3.
Check the continuity between high pressure fuel pump relay harness connector and ground.
4.
Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace malfunctioning part.
7.
CHECK HIGH PRESSURE FUEL PUMP RELAY
Check high pressure fuel pump relay. Refer to
ECM-384, "Component Inspection (High Pressure Fuel Pump
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace high pressure fuel pump relay. Refer to
for connector num-
ber,
PG-103, "LHD : Engine Room Harness"
PG-120, "RHD : Engine Room Harness"
(RHD) for relay location.
8.
CHECK HIGH PRESSURE FUEL PUMP CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector and high pressure fuel pump relay harness connector.
3.
Check the continuity between ECM harness connector and high pressure fuel pump harness connector.
4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace malfunctioning part.
9.
CHECK HIGH PRESSURE FUEL PUMP
Check high pressure fuel pump. Refer to
ECM-383, "Component Inspection (High Pressure Fuel Pump)"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace high pressure fuel pump. Refer to
EM-159, "Removal and Installation"
.
+
−
Continuity
IPDM E/R
High pressure fuel pump relay
Connector
Terminal
Connector
Terminal
F90
96
F161
1
Existed
+
−
Continuity
High pressure fuel pump relay
Connector
Terminal
F161
2
Ground
Existed
+
−
Continuity
ECM
High pressure fuel pump
Connector
Terminal
Connector
Terminal
F16
51
F161
1
Existed
52
2
HIGH PRESSURE FUEL PUMP
ECM-383
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
10.
CHECK HIGH PRESSURE FUEL PUMP INSTALLATION
1.
Turn ignition switch OFF.
2.
Check high pressure fuel pump for improper attachment or looseness.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair or replace malfunctioning part.
11.
CHECK CAMSHAFT
1.
Remove camshaft. Refer to
EM-197, "Removal and Installation"
2.
Check camshaft. Refer to
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace camshaft. Refer to
EM-197, "Removal and Installation"
.
Component Inspection (High Pressure Fuel Pump)
INFOID:0000000010703068
1.
CHECK HIGH PRESSURE FUEL PUMP-1
1.
Turn ignition switch OFF.
2.
Disconnect high pressure fuel pump harness connector.
3.
check the resistance between high pressure fuel pump terminals as per the following conditions.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace high pressure fuel pump. Refer to
EM-159, "Removal and Installation"
.
2.
CHECK HIGH PRESSURE FUEL PUMP-2
With CONSULT
1.
Reconnect high pressure fuel pump harness connector.
2.
Start engine.
3.
Select “FUEL PRES SEN V” in “DATA MONITOR” mode of “ENGINE” using CONSULT and check the
indication as per the following conditions.
Without CONSULT
1.
Start engine.
2.
Check fuel rail pressure sensor signal voltage.
High pressure fuel pump
Condition
Resistance
+
−
Terminal
1
2
Temperature [
°
C (
°
F)]
20 - 30 (68 - 86)
0.46 - 0.51
Ω
Monitor item
Condition
Indication
FUEL PRES SEN V
At idle
820 - 1,140 mV
Revving engine up to 4,000 rpm quickly.
820 - 2,900 mV
ECM
Condition
Voltage
(Approx.)
Connector
+
−
Terminal
F15
33
39
[Engine is running]
• Warm-up condition
• Idle speed
0.82 – 1.14 V
[Engine is running]
• Warm-up condition
• Engine speed: Revving engine from idle to 4,000 rpm
0.82 – 2.9 V
ECM-384
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
HIGH PRESSURE FUEL PUMP
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace high pressure fuel pump. Refer to
EM-159, "Removal and Installation"
.
Component Inspection (High Pressure Fuel Pump Relay)
INFOID:0000000010703069
1.
CHECK HIGH PRESSURE FUEL PUMP RELAY
1.
Turn ignition switch OFF.
2.
Remove high pressure fuel pump relay. Refer to
ECM-14, "ENGINE CONTROL SYSTEM : Component
3.
Check the continuity between high pressure fuel pump relay ter-
minals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace high pressure fuel pump relay. Refer to
ECM-14, "ENGINE CONTROL SYSTEM : Com-
.
+
−
Condition
Continuity
High pressure fuel
pump relay
Terminal
3
5
12 V direct current supply between
terminals 1 and 2
Existed
No current supply
Not existed
PBIB0098E
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