Nissan Tiida C11. Instruction — part 582
EC-978
< COMPONENT DIAGNOSIS >
[MR18DE]
FUEL PUMP
FUEL PUMP
Description
INFOID:0000000001161973
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
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 engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed 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 Function Check
INFOID:0000000001161974
1.
CHECK FUEL PUMP FUNCTION
1.
Turn ignition switch ON.
2.
Pinch fuel feed hose with two fingers.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>>
.
Diagnosis Procedure
INFOID:0000000001161975
1.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between ECM harness connector terminals as follows.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 2.
2.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
Sensor
Input signal to ECM
ECM Function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*
Fuel pump control
Fuel pump relay
↓
Fuel pump
Battery
Battery voltage*
Condition
Fuel pump operation
Ignition switch is turned to ON.
Operates for 1 second.
Engine running and cranking
Operates.
When engine is stopped
Stops in 1.5 seconds.
Except as shown above
Stops.
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
JMBIA0351ZZ
(+)
(–)
Voltage
Connector
Terminal
Connector
Terminal
F10
23
E16
108
Battery voltage
FUEL PUMP
EC-979
< COMPONENT DIAGNOSIS >
[MR18DE]
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1.
Turn ignition switch OFF.
2.
Disconnect IDPDM E/R harness connector.
3.
Check the continuity between IPDM E/R harness connector and ECM harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness or connectors E8, F8.
• Harness for open or short to ground and short power.
>> Repair harness or connectors.
4.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1.
Turn ignition switch OFF.
2.
Reconnect all harness connectors disconnected.
3.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
4.
Turn ignition switch ON.
5.
Check voltage between “fuel level sensor unit and fuel pump” harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 5.
5.
CHECK 10A FUSE
1.
Turn ignition switch OFF.
2.
Disconnect 15A fuse (No. 48) from IPDM E/R.
3.
Check 15A fuse.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace fuse.
6.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1.
Disconnect IPDM E/R harness connector.
2.
Check the continuity between IPDM E/R harness connector and “fuel level sensor unit and fuel pump”
harness connector.
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 10.
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F10
23
E46
47
Existed
Fuel level sensor unit
and fuel pump
Ground
Voltage
Connector
Terminal
B40
1
Ground
Battery voltage should exist 1
second after ignition switch is
turn ON.
IPDM E/R
Fuel level sensor unit and
fuel pump
Continuity
Connector
Terminal
Connector
Terminal
E45
36
B40
1
Existed
EC-980
< COMPONENT DIAGNOSIS >
[MR18DE]
FUEL PUMP
NO
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E7, M69, M12, B1.
• Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to power in harness or connectors.
8.
CHECK FUEL PUMP GROUND CIRCUIT
1.
Check the continuity between “fuel level sensor unit and fuel pump” and ground.
2.
Also heck harness for short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair open circuit or short to power in harness or connectors.
9.
CHECK FUEL PUMP
EC-980, "Component Inspection (Fuel Pump)"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace fuel pump.
10.
CHECK INTERMITTENT INCIDENT
GI-55, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair or replace harness or connectors.
Component Inspection (Fuel Pump)
INFOID:0000000001161976
1.
CHECK FUEL PUMP
1.
Turn ignition switch OFF.
2.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
3.
Check resistance between “fuel level sensor unit and fuel pump” terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace “fuel level sensor unit and fuel pump”.
Fuel level sensor unit
and fuel pump
Ground
Continuity
Connector
Terminal
B40
3
Ground
Existed
Terminals
Resistance
1 and 3
0.2 - 5.0
Ω
[at 25
°
C (77
°
F)]
IGNITION SIGNAL
EC-981
< COMPONENT DIAGNOSIS >
[MR18DE]
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IGNITION SIGNAL
Description
INFOID:0000000001161977
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil
secondary circuit.
Component Function Check
INFOID:0000000001161978
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3.
NO
>> Go to
2.
IGNITION SIGNAL FUNCTION
With CONSULT-III
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
2.
Make sure that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
3.
IGNITION SIGNAL FUNCTION
Without CONSULT-III
1.
Let engine idle.
2.
Read the voltage signal between ECM harness connector terminals as follows.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000001161979
1.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
2.
Check the voltage between ECM harness connector terminals as follows.
ECM
Ground
Voltage signal
Connector
Terminal
Connector
Terminal
F10
17
E16
108
18
21
22
JMBIA0329GB
(+)
(–)
Voltage
Connector
Terminal
Connector
Terminal
E16
105
E16
108
Battery voltage
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