Nissan Frontier D22. Manual - part 510

INJECTOR CIRCUIT

EC-1143

[VG33E]

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2. 

CHECK OVERALL FUNCTION

 With CONSULT-II

1.

Start engine.

2.

Perform  “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.

3.

Make sure that each circuit produces a momentary engine
speed drop.

 Without CONSULT-II

1.

Start engine.

2.

Listen to each injector operating sound.
Clicking noise should be heard.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 3.

3. 

CHECK INJECTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect injector harness connector.

3.

Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

SEF070Y

MEC703B

Voltage: Battery voltage

SEF671W

EC-1144

[VG33E]

INJECTOR CIRCUIT

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M59, F27

●

Harness connectors F37, F101

●

Fuse block (J/B) connector M26

●

10A fuse

●

Harness for open or short between injector and fuse

>> Repair harness or connectors.

5. 

CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between injector terminal 2 and ECM terminals 102, 104, 106, 109, 111, 113.
Refer to Wiring Diagram.

3.

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 F37, F101

●

Harness connectors F38, F102

●

Harness for open or short between ECM and injector

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

7. 

CHECK INJECTOR

1.

Disconnect injector harness connector.

2.

Check resistance between terminals as shown in the figure.

OK or NG

OK

>> GO TO 8.

NG

>> Replace injector.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Removal and Installation

UBS00DQC

INJECTOR

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

Continuity should exist.

Resistance: 10 - 14

Ω [at 25°C (77°F)]

SEF625V

START SIGNAL

EC-1145

[VG33E]

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START SIGNAL

PFP:48750

CONSULT-II Reference Value in Data Monitor Mode

UBS00DQD

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

START SIGNAL

●

Ignition switch: ON 

→ START → ON

OFF 

→ ON → OFF

EC-1146

[VG33E]

START SIGNAL

Wiring Diagram

UBS00DQE

BBWA1097E