Nissan Titan. Manual - part 289

 

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Nissan Titan. Manual - part 289

 

 

ELECTRICAL LOAD SIGNAL

EC-457

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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ELECTRICAL LOAD SIGNAL

Description

INFOID:0000000009886914

The electrical load signal (Headlamp switch signal, etc.) is transferred through the CAN communication line

from BCM to ECM via IPDM E/R.

Diagnosis Procedure

INFOID:0000000009886915

1.

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I

1. Turn ignition switch ON.

2. Connect CONSULT and select “DATA MONITOR” mode.

3. Select “LOAD SIGNAL” and check indication under the following conditions.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2.

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II

Check “LOAD SIGNAL” indication under the following conditions.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 5.

3.

CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION

Select “HEATER FAN SW” and check indication under the following conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

4.

CHECK REAR WINDOW DEFOGGER SYSTEM

Refer to 

DEF-46, "Filament Check"

.

>> INSPECTION END

5.

CHECK HEADLAMP SYSTEM

Refer to 

EXL-4, "Work Flow"

.

>> INSPECTION END

6.

CHECK HEATER FAN CONTROL SYSTEM

Refer to 

HAC-17, "CONSULT Function (HVAC)"

 (with automatic air conditioner) or 

HAC-111, "CONSULT

Function (HVAC)"

 (with manual air conditioner).

Condition

Indication

Rear window defogger switch: ON

ON

Rear window defogger switch: OFF

OFF

Condition

Indication

Lighting switch: ON at 2nd position

ON

Lighting switch: OFF

OFF

Condition

Indication

Heater fan control switch: ON

ON

Heater fan control switch: OFF

OFF

EC-458

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

ELECTRICAL LOAD SIGNAL

>> INSPECTION END

FUEL INJECTOR

EC-459

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FUEL INJECTOR

Component Description

INFOID:0000000009886916

The fuel injector is a small, precise solenoid valve. When the ECM

supplies a ground to the fuel injector circuit, the coil in the fuel injec-

tor is energized. The energized coil pulls the ball valve back and

allows fuel to flow through the fuel injector into the intake manifold.

The amount of fuel injected depends upon the injection pulse dura-

tion. Pulse duration is the length of time the fuel injector remains

open. The ECM controls the injection pulse duration based on

engine fuel needs.

Diagnosis Procedure

INFOID:0000000009886917

1.

INSPECTION START

Turn ignition switch to START.

Is any cylinder ignited?
Yes or No

Yes

>> GO TO 2.

No

>> GO TO 3.

2.

CHECK OVERALL FUNCTION

 With CONSULT

1.  Start engine.

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

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

 Without CONSULT

1. Start engine.

2. Listen to each fuel injector operating sound.

Clicking noise should be heard.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 3.

3.

CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect fuel injector harness connector.

3. Turn ignition switch ON.

SEF375Z

PBIB1986E

BBIA0374E

EC-460

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

FUEL INJECTOR

4. Check voltage between fuel injector terminal 1 and ground with

CONSULT or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

 Check the following.

• Harness connectors E2, F32

• IPDM E/R connector E119

• 15A fuse

• Harness for open or short between fuel injector and fuse

>> Repair harness or connectors.

5.

CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42, 44,

63. 

Refer to Wiring Diagram.

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

OK

>> GO TO 6.

NG

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

6.

CHECK FUEL INJECTOR

Refer to 

EC-460, "Component Inspection"

.

OK or NG

OK

>> GO TO 7.

NG

>> Replace malfunctioning fuel injector.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "How to Check Terminal"

 and 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009886918

FUEL INJECTOR

1. Disconnect fuel injector harness connector.

Voltage: Battery voltage

PBIB0582E

Continuity should exist.

 

 

 

 

 

 

 

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