Nissan Titan. Instruction — part 291

FUEL PUMP

EC-465

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

• Harness for open or short between fuel pump and IPDM E/R

• Harness for open or short between fuel pump and ground

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

12.

CHECK FUEL PUMP

Refer to

EC-468, "Component Inspection"

.

OK or NG

OK

>> GO TO 13.

NG

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

13.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "How to Check Terminal"

and

GI-42, "Intermittent Incident"

.

OK or NG

OK

>> Replace IPDM E/R.

NG

>> Repair or replace harness or connectors.

FLEXIBLE FUEL VEHICLE

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 or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

3.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II

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

BBIA0357E

Voltage: Battery voltage

PBIB1187E

EC-466

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

FUEL PUMP

Check voltage between IPDM E/R terminal 46 and ground with

CONSULT or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 14.

4.

DETECT MALFUNCTIONING PART

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

>> Repair harness or connectors.

5.

CHECK CONDENSER-2 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Disconnect condenser-2 harness connector.

4. Turn ignition switch ON.

5. Check voltage between condenser-2 terminal 1 and ground with

CONSULT or tester.

6. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 8.

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 CONDENSER-2 POWER SUPPLY CIRCUIT-II FOR OPEN AND SHORT

1. Disconnect IPDM E/R harness connector E119.

2. Check harness continuity between IPDM E/R terminal 13 and condenser-2 terminal 1.

Refer to Wiring Diagram.

Voltage: Battery voltage

PBIB2656E

BBIA0388E

Voltage:

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

PBIB0624E

Continuity should exist.

FUEL PUMP

EC-467

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 14.

NG

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

8.

CHECK CONDENSER-2 GROUND CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between condenser-2 terminal 2 and ground.

Refer to Wiring Diagram.

2. Also check harness for short to power.
OK or NG

OK

>> GO TO 9.

NG

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

9.

CHECK CONDENSER-2

Refer to

EC-468, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace condenser-2.

10.

CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

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

nector.

3. Disconnect IPDM E/R harness connector E119.

4. Disconnect dropping resistor harness connector.

5. Check harness continuity between IPDM E/R terminal 13 and

“fuel level sensor unit and fuel pump” terminal 1, “fuel level sen-

sor unit and fuel pump” terminal 2 and dropping resistor terminal

2, dropping resistor terminal 1 and ground.

Refer to Wiring Diagram.

6. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 12.

NG

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E41, C1

• Harness for open or short between fuel pump and IPDM E/R

• Harness for open or short between fuel pump and dropping resistor

• Harness for open or short between dropping resistor and ground

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

12.

CHECK DROPPING RESISTOR

Refer to

EC-468, "Component Inspection"

.

OK or NG

OK

>> GO TO 13.

NG

>> Replace dropping resistor.

13.

CHECK FUEL PUMP

Refer to

EC-468, "Component Inspection"

.

OK or NG

Continuity should exist.

Continuity should exist.

BBIA0442E

EC-468

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

FUEL PUMP

OK

>> GO TO 14.

NG

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

14.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "How to Check Terminal"

and

GI-42, "Intermittent Incident"

.

OK or NG

OK

>> Replace IPDM E/R.

NG

>> Repair or replace harness or connectors.

Component Inspection

INFOID:0000000009886921

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.

DROPPING RESISTOR

1. Turn ignition switch OFF.

2. Disconnect dropping resistor harness connector.

3. Check resistance between dropping resistor terminals as 1 and

2.

CONDENSER-2

1. Turn ignition switch OFF.

2. Disconnect condenser-2 harness connector.

3. Check resistance between condenser-2 terminals as 1 and 2.

Resistance: 0.2 - 5.0

Ω [at 25°C (77°F)]

SEC918C

Resistance

Above 1 M

Ω at 25°C (77°F)

PBIB0131E

Resistance

Above 1 M

Ω at 25°C (77°F)

PBIB0794E