Page 1969 of 3502
![NISSAN TEANA 2003 Service Manual FUEL INJECTOR
EC-687
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3. CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-II
1. Stop engine.
2. Disconnect harness connector F1, F251.
3. Turn ignition switch ON.
4. NISSAN TEANA 2003 Service Manual FUEL INJECTOR
EC-687
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3. CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-II
1. Stop engine.
2. Disconnect harness connector F1, F251.
3. Turn ignition switch ON.
4.](/manual-img/5/57392/w960_57392-1968.png)
FUEL INJECTOR
EC-687
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3. CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-II
1. Stop engine.
2. Disconnect harness connector F1, F251.
3. Turn ignition switch ON.
4. Check voltage between harness connector F1 terminal 5 and
ground with CONSULT-II or tester.
5. Turn ignition switch OFF.
6. Disconnect ECM harness connector.
7. Check harness continuity between harness connector F1 and
ECM as follows.
Refer to Wiring Diagram.
8. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M52, F103
Fuse block (J/B) connector M1
10A fuse
Harness for open or short between harness connector F1 and fuse
Harness for open or short between harness connector F251 and fuel injector
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK FUNCTION OF FUEL INJECTOR-II
Provide battery voltage between harness connector F251 as follows
and then interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK >> GO TO 6.
NG >> GO TO 7.Voltage: Battery voltage
CylinderHarness connector F1
terminalECM terminal
1623
3222
5121
Continuity should exist.
PBIB2323E
CylinderHarness connector F251 terminal
(+) (–)
156
352
551
Operating sound should exist.PBIB2324E
Page 1970 of 3502
EC-688
[VQ]
FUEL INJECTOR
6. CHECK FUNCTION OF FUEL INJECTOR-III
1. Reconnect all harness connector disconnected.
2. Start engine.
3. Listen to fuel injectors No. 2, No. 4, No.6 operating sound.
OK or NG
OK >>INSPECTION END
NG >> GO TO 7.
7. CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M52, F103
Harness connectors F1, F251
Fuse block (J/B) connector M1
10A fuse
Harness for open or short between fuel injector and fuse
>> Repair harness or connectors. Clicking noise should exist.
PBIB1986E
Voltage: Battery voltage
PBIB2182E
PBIB0582E
Page 1971 of 3502
![NISSAN TEANA 2003 Service Manual FUEL INJECTOR
EC-689
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9. CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness NISSAN TEANA 2003 Service Manual FUEL INJECTOR
EC-689
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9. CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness](/manual-img/5/57392/w960_57392-1970.png)
FUEL INJECTOR
EC-689
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9. CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F1, F251
Harness for open or short between fuel injector and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK FUEL INJECTOR
Refer to EC-689, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace fuel injector.
12. CHECK INTERMITTENT INCIDENT
Refer to EC-450, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionBBS0056N
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as shown in the figure.
Removal and InstallationBBS0056O
FUEL INJECTOR
Refer to EM-155, "FUEL INJECTOR AND FUEL TUBE" . Continuity should exist.
Resistance:
VQ23DE: 13.5 - 17.5 [at 10 - 60°C (50 - 140°F)]
VQ35DE: 11.1 - 14.5 [at 10 - 60°C (50 - 140°F)]
PBIB1727E
Page 1972 of 3502
![NISSAN TEANA 2003 Service Manual EC-690
[VQ]
FUEL PUMP
FUEL PUMPPFP:17042
DescriptionBBS0056P
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fu NISSAN TEANA 2003 Service Manual EC-690
[VQ]
FUEL PUMP
FUEL PUMPPFP:17042
DescriptionBBS0056P
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fu](/manual-img/5/57392/w960_57392-1971.png)
EC-690
[VQ]
FUEL PUMP
FUEL PUMPPFP:17042
DescriptionBBS0056P
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for 1 second after the ignition switch is turned ON to improve engine start-
ability. 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 DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeBBS0056Q
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveSto ps.
PBIB2259E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY
For 1 second after turning ignition switch ON
Engine running or crankingON
Except above conditions OFF
Page 1973 of 3502
FUEL PUMP
EC-691
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Wiring DiagramBBS0056R
TBWM0642E
Page 1974 of 3502
![NISSAN TEANA 2003 Service Manual EC-692
[VQ]
FUEL PUMP
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing s NISSAN TEANA 2003 Service Manual EC-692
[VQ]
FUEL PUMP
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing s](/manual-img/5/57392/w960_57392-1973.png)
EC-692
[VQ]
FUEL PUMP
Specification data are reference values and are measured between each terminal and 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.
Diagnostic ProcedureBBS0056S
1. CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 113 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
113 B/R Fuel pump relay[Ignition switch: ON]
For 1 second after turning ignition switch
ON.
[Engine is running]0 - 1.5V
[Ignition switch: ON]
More than 1 second after turning ignition
switch ON.BATTERY VOLTAGE
(11 - 14V)
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
PBIB2125E
Voltage: Battery voltage
PBIB1187E
Page 1975 of 3502
![NISSAN TEANA 2003 Service Manual FUEL PUMP
EC-693
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3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E8.
3. Turn ignition switch ON.
4. Che NISSAN TEANA 2003 Service Manual FUEL PUMP
EC-693
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3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E8.
3. Turn ignition switch ON.
4. Che](/manual-img/5/57392/w960_57392-1974.png)
FUEL PUMP
EC-693
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3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E8.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R terminal 40 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 13.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E206, M13
Harness for open or short between IPDM E/R and ECM
>> Repair harness or connectors.
5. CHECK CONDENSER POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser harness connector.
4. Turn ignition switch ON.
5. Check voltage between condenser terminal 1 and ground with
CONSULT-II or tester.
6. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
6. CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.Voltage: Battery voltage
PBIB1926E
Voltage: Battery voltage should exist for 1 second
after ignition switch is turned ON.
PBIB0624E
Page 1976 of 3502
![NISSAN TEANA 2003 Service Manual EC-694
[VQ]
FUEL PUMP
7. CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and condenser terminal 1.
Refer NISSAN TEANA 2003 Service Manual EC-694
[VQ]
FUEL PUMP
7. CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and condenser terminal 1.
Refer](/manual-img/5/57392/w960_57392-1975.png)
EC-694
[VQ]
FUEL PUMP
7. CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and condenser terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E11, E253
Harness connectors B202, E104
Harness for open or short between IPDM E/R and condenser
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK CONDENSER GROUND CIRCUIT
1. Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to power in harness or connectors.
10. CHECK CONDENSER
Refer to EC-695, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace condenser.
11 . CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect harness connectors E104, B202
3. Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.
4. Check harness continuity between “fuel level sensor unit and
fuel pump” terminal 1 and harness connector B202 terminal 1,
“fuel level sensor unit and fuel pump” terminal 3 and ground.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 12.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.Continuity should exist.
Continuity should exist.
Continuity should exist.PBIB2121E