Nissan Pathfinder (2006 year). Manual - part 223

FUEL PUMP

EC-643

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2006 Pathfinder

3. 

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II

Check voltage between IPDM E/R terminal 46 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 12.

4. 

DETECT MALFUNCTIONING PART

Check harness for open or short between IPDM E/R and ECM

>> Repair 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-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

PBIB2656E

BBIA0545E

Voltage:

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

PBIB0795E

EC-644

FUEL PUMP

2006 Pathfinder

7. 

CHECK FUEL PUMP POWER SUPPLY CURCUIT-IV

1.

Disconnect IPDM E/R harness connector E119.

2.

Check harness continuity between “fuel level sensor unit and fuel pump” terminal 1 and IPDM E/R termi-
nal 13.
Refer to Wiring Diagram. 

3.

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

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors C1, E41

●

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

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

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

10. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors C1, E41

●

Harness for open or short between “fuel level sensor unit and fuel pump” and ground

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

11. 

CHECK FUEL PUMP

Refer to 

EC-644, "Component Inspection"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace fuel pump.

12. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

OK or NG

OK

>> Replace IPDM E/R.

NG

>> Repair or replace harness or connectors.

Component Inspection

UBS00KIG

FUEL PUMP

1.

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

Continuity should exist.

Continuity should exist.

FUEL PUMP

EC-645

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2006 Pathfinder

2.

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

Removal and Installation

UBS00KIH

FUEL PUMP

Refer to 

FL-6, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"

 .

Resistance: Approximately 0.2 - 5.0

Ω

 [at 25

°

C (77

°

F)]

SEC918C

EC-646

IGNITION SIGNAL

2006 Pathfinder

IGNITION SIGNAL

PFP:22448

Component Description

UBS00KHV

IGNITION COIL & POWER TRANSISTOR

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.

BBIA0561E

IGNITION SIGNAL

EC-647

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2006 Pathfinder

Wiring Diagram

UBS00KHW

BBWA2376E

EC-648

IGNITION SIGNAL

2006 Pathfinder

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.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

111

BR

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

●

For a few seconds after turning ignition 
switch OFF

0 - 1.5V

[Ignition switch: OFF]

●

More than a few seconds passed after turn-
ing ignition switch OFF

BATTERY VOLTAGE
(11 - 14V)

119

120

R
P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

IGNITION SIGNAL

EC-649

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2006 Pathfinder

BBWA2377E

EC-650

IGNITION SIGNAL

2006 Pathfinder

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

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.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

60
61
62

SB
L
Y

Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm 
at idle

0 - 0.2V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

0.1 - 0.4V

SEC986C

SEC987C