Nissan Frontier D22. Manual - part 361

 

  Index      Nissan     Nissan Frontier D22 Pickup (1998-2004 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  359  360  361  362   ..

 

 

Nissan Frontier D22. Manual - part 361

 

 

START SIGNAL

EC-547

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

4. 

DETECT MALFUNCTIONING PART

Check the 7.5A fuse.

OK or NG

OK

>> GO TO 5.

NG

>> Replace 7.5A fuse.

5. 

CHECK INPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector and 7.5A fuse.

3.

Check harness continuity between ECM terminal 20 and fuse
block.

4.

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

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M81, F36

Fuse block (J/B) connector M26

Harness for open or short between ECM and fuse block

OK or NG

OK

>> GO TO 7.

NG

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

7. 

CHECK INTERMITTENT INCIDENT

Perform 

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Continuity should exist.

SEF224V

EC-548

[KA24DE]

FUEL PUMP CIRCUIT

FUEL PUMP CIRCUIT

PFP:17042

Description

UBS00DDC

SYSTEM DESCRIPTION

The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a 180

° signal from the camshaft position sensor, it knows that the engine is

rotating, and causes the pump to perform. If the 180

° 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

The fuel pump with a fuel damper is an in-tank type (the pump and
damper are located in the fuel tank).

CONSULT-II Reference Value in Data Monitor Mode

UBS00DDD

Sensor

Input Signal to ECM

ECM function

Actuator

Camshaft position sensor

Engine speed

Fuel pump control

Fuel pump relay

Ignition switch

Start signal

Condition

Fuel pump operation

Ignition switch is turned to ON.

Operates for 5 seconds.

Engine running and cranking

Operates.

Except as shown above

Stops.

SFE425A

MONITOR ITEM

CONDITION

SPECIFICATION

FUEL PUMP RLY

Ignition switch is turned to ON (Operates for 5 seconds)

Engine running and cranking

ON

Except as shown above

OFF

FUEL PUMP CIRCUIT

EC-549

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

UBS00DDE

BBWA1071E

EC-550

[KA24DE]

FUEL PUMP CIRCUIT

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

UBS00DDF

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 5 seconds after ignition switch is turned ON.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

2. 

CHECK POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect fuel pump relay.

3.

Turn ignition switch ON.

4.

Check voltage between terminals 2, 5 and ground with CON-
SULT-II or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

11

W/R

Fuel pump relay

[Ignition switch: ON]

For a few seconds after turning ignition switch ON

[Engine is running]

 0 - 1V

[Ignition switch: ON]

More than a few seconds after turning ignition 
switch ON

BATTERY VOLTAGE
(11 - 14V)

SEF348V

Voltage

: Battery voltage

LEC103A

SEF225V

 

 

 

 

 

 

 

Content   ..  359  360  361  362   ..