Infiniti FX35 / FX45. Manual - part 599

FUEL PUMP

EC-1157

< SERVICE INFORMATION >

[VK45DE]

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Diagnosis Procedure

INFOID:0000000001327060

1.

CHECK OVERALL FUNCTION

1.

Turn ignition switch ON.

2.

Pinch fuel feed hose (1) 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-III or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

3.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II

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-III or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 11.

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

113

GY/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.

PBIB3245E

Voltage: Battery voltage 

PBIB1187E

Voltage: Battery voltage

PBIB1926E

EC-1158

< SERVICE INFORMATION >

[VK45DE]

FUEL PUMP

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness for open or short between IPDM E/R and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

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 con-
nector.

4.

Turn ignition switch ON.

5.

Check voltage between “fuel level sensor unit and fuel pump”
terminal 1 and ground with CONSULT-III 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.

7.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV

1.

Disconnect IPDM E/R harness connector E8.

2.

Check harness continuity between IPDM E/R terminal 39 and “fuel level sensor unit and fuel pump” termi-
nal 1.
Refer to Wiring Diagram. 

3.

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

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E206, B6

PBIB1507E

Voltage:

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

PBIB0795E

Continuity should exist.

FUEL PUMP

EC-1159

< SERVICE INFORMATION >

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• Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump”

>> Repair harness or connectors.

9.

CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between “fuel level sensor unit and fuel pump” terminal 3 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 FUEL PUMP

Refer to 

EC-1159, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> Replace fuel pump.

11.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-717

.

OK or NG

OK

>> Replace IPDM E/R. Refer to 

PG-17

.

NG

>> Repair or replace harness or connectors.

Component Inspection

INFOID:0000000001327061

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.

Removal and Installation

INFOID:0000000001327062

FUEL PUMP

Refer to 

FL-4

.

Continuity should exist.

Resistance: 0.2 - 5.0

Ω

 [at 25

°

C (77

°

F)]

SEC918C

EC-1160

< SERVICE INFORMATION >

[VK45DE]

ICC BRAKE SWITCH

ICC BRAKE SWITCH

Component Description

INFOID:0000000001327063

When depress on the brake pedal, ICC brake switch is turned OFF
and stop lamp switch is turned ON. ECM detects the state of the
brake pedal by this input of two kinds (ON/OFF signal)
Refer to 

ACS-7

 for the ICC function.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001327064

Specification data are reference values.

PBIB2558E

MONITOR ITEM

CONDITION

SPECIFICATION

BRAKE SW1
(ICC brake switch)

• Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

BRAKE SW2
(Stop lamp switch)

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON