Nissan Titan A60. Manual - part 446

 

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Nissan Titan A60. Manual - part 446

 

 

EC-450

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

FUEL PUMP

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

CONSULT-III 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-III 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-451

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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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-452, "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-452, "Component Inspection"

.

OK or NG

OK

>> GO TO 13.

NG

>> Replace dropping resistor.

13.

CHECK FUEL PUMP

Refer to 

EC-452, "Component Inspection"

.

OK or NG

Continuity should exist.

Continuity should exist.

BBIA0442E

EC-452

< 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-36, "How to Check Terminal"

 and 

GI-39, "Intermittent Incident"

.

OK or NG

OK

>> Replace IPDM E/R.

NG

>> Repair or replace harness or connectors.

Component Inspection

INFOID:0000000006158931

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

 [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

IGNITION SIGNAL

EC-453

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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IGNITION SIGNAL

Component Description

INFOID:0000000006158932

IGNITION COIL & POWER TRANSISTOR

The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns

ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil

secondary circuit.

Diagnosis Procedure

INFOID:0000000006158933

1.

CHECK ENGINE START

Turn ignition switch OFF, and restart engine.

Is engine running?
Yes or No

Yes (With CONSULT-III)>>GO TO 2.

Yes (Without CONSULT-III)>>GO TO 3.

No

>> GO TO 4.

2.

CHECK OVERALL FUNCTION

 With CONSULT-III

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

2. Make sure that each circuit produces a momentary engine speed drop.
OK or NG

OK

>> INSPECTION END

NG

>> GO TO 10.

3.

CHECK OVERALL FUNCTION

 Without CONSULT-III

1. Let engine idle.

2. Read the voltage signal between ECM terminals 46, 60, 61, 62,

65, 79, 80, 81 and ground with an oscilloscope.

3. Verify that the oscilloscope screen shows the signal wave as

shown below.

NOTE:

The pulse cycle changes depending on rpm at idle.

OK or NG

1.

Ignition coils (with power transistor) 
(bank 2)

2.

Ignition coils (with power transistor) 
(bank 1)

BBIA0777E

PBIB2094E

PBIB0044E

 

 

 

 

 

 

 

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