Nissan Frontier D22. Instruction — part 360

INJECTOR CIRCUIT

EC-543

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

3.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F27, M59

●

Fuse block (J/B) connector M26

●

10A fuse

●

Harness for open or short between injector and fuse

>> Repair harness or connectors.

4.

CHECK OUTPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between injector terminal 2 and ECM terminals 102, 104, 109, 111.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the harness for open or short between ECM and injector.

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

6.

CHECK INJECTOR

1.

Disconnect injector harness connector.

2.

Check resistance between terminals as shown in the figure.

OK or NG

OK

>> GO TO 7.

NG

>> Replace injector.

7.

CHECK INTERMITTENT INCIDENT

Perform

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END

Removal and Installation

UBS00DD8

INJECTOR

Refer to

EM-13, "OUTER COMPONENT PARTS"

.

Continuity should exist.

Resistance

: 7.3 - 9.9

Ω [at 25°C (77°F)]

SEF273W

EC-544

[KA24DE]

START SIGNAL

START SIGNAL

PFP:48750

CONSULT-II Reference Value in Data Monitor Mode

UBS00DD9

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

START SIGNAL

●

Ignition switch: ON

→ START → ON

OFF

→ ON → OFF

START SIGNAL

EC-545

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

UBS00DDA

BBWA1070E

EC-546

[KA24DE]

START SIGNAL

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

UBS00DDB

1.

INSPECTION START

Do you have CONSULT-II?

Yes or No

Yes

>> GO TO 2.

No

>> GO TO 3.

2.

CHECK OVERALL FUNCTION

With CONSULT-II

1.

Turn ignition switch ON.

2.

Check “START SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 4.

3.

CHECK OVERALL FUNCTION

Without CONSULT-II

1.

Turn ignition switch to START.

2.

Check voltage between ECM terminal 20 and ground under the following conditions.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 4.

TER-

MINAL

NO.

WIRE

COLO

R

ITEM

CONDITION

DATA (DC Voltage)

20

L/OR

Start signal

[Ignition switch: ON]

Approximately 0V

[Ignition switch: START]

BATTERY VOLTAGE
(11 - 14V)

SEF227Y

Condition

Voltage

Ignition switch START

Battery voltage

Except above

Approx. 0V

SEF109P