Infiniti G35 (V35). Manual - part 445

FUEL PUMP

EC-661

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EC

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 Procedure

NBS0011W

1. 

CHECK OVERALL FUNCTION

1.

Turn ignition switch ON.

2.

Pinch fuel feed hose with two fingers.
Fuel pressure pulsation should be felt on the fuel feed hose
for 1 second after ignition switch is turned ON.

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 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

113

B/OR

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)

PBIB1020E

Voltage: Battery voltage 

PBIB1187E

EC-662

FUEL PUMP

3. 

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I

1.

Disconnect IPDM E/R harness connector E8.

2.

Check harness continuity between IPDM E/R terminal 40 and ECM terminal 113.
Refer to Wiring Diagram. 

3.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 13.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E11, F2

●

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. 

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.

Continuity should exist.

Voltage:

Battery voltage should exist for 1 sec-
ond after ignition switch is turned ON.

PBIB0624E

FUEL PUMP

EC-663

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EC

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 E123, B41

●

Harness for open or short between IPDM E/R and condenser

>> Repair harness or connectors.

9. 

CHECK CONDENSER GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring Diagram.

3.

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-664, "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.

Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.

2.

Disconnect harness connectors E123, B41

3.

Check harness continuity between the following;
“fuel level sensor unit and fuel pump” terminal 1 and harness
connector B41 terminal 3,
 “fuel level sensor unit and fuel pump” terminal 3 and ground.
Refer to Wiring Diagram. 

4.

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.

PBIB1280E

EC-664

FUEL PUMP

12. 

CHECK FUEL PUMP

Refer to 

EC-664, "Component Inspection"

 .

OK or NG

OK

>> GO TO 13.

NG

>> Replace “fuel level sensor unit and fuel pump”.

13. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

OK or NG

OK

>> Replace IPDM E/R.

NG

>> Repair or replace harness or connectors.

Component Inspection

NBS0011X

FUEL PUMP

1.

Disconnect “fuel level sensor unit and fuel pump” harness connector.

2.

Check resistance between “fuel level sensor unit and fuel pump”
terminals 1 and 3.

CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals 1 and 2.

Removal and Installation

NBS0011Y

FUEL PUMP

Refer to 

FL-5, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"

 .

Resistance: 0.2 - 5.0

Ω

 [at 25

°

C (77

°

F)]

SEC918C

Resistance: Above 1M

Ω

 [at 25

°

C (77

°

F)]

PBIB0794E