Infiniti QX56 (JA60). Manual - part 362

 

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Infiniti QX56 (JA60). Manual - part 362

 

 

EC-100

< COMPONENT DIAGNOSIS >

[VK56DE]

P0037, P0038, P0057, P0058 HO2S2 HEATER

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal and HO2S2 terminal as follows.

Refer to Wiring Diagram.

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

OK

>> GO TO 5.

NG

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

5.

CHECK HEATED OXYGEN SENSOR 2 HEATER

Refer to 

EC-100, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace malfunctioning heated oxygen sensor 2.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "How to Check Terminal"

 and 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005149104

HEATED OXYGEN SENSOR 2 HEATER

1. Check resistance between HO2S2 terminals as follows.

2. If NG, replace heated oxygen sensor 2.

CAUTION:

• Discard any heated oxygen sensor which has been dropped

from a height of more than 0.5 m (19.7 in) onto a hard surface

such as a concrete floor; use a new one.

• Before installing new oxygen sensor, clean exhaust system

threads using Oxygen Sensor Thread Cleaner tool J-43897-18

or J-43897-12 and approved anti-seize lubricant.

DTC

Terminals

Bank

ECM

Sensor

P0037, P0038

6

2

1

P0057, P0058

25

2

2

Continuity should exist.

Terminal No.

Resistance

2 and 3

8 - 10 

Ω [at 25°C (77°F)]

1 and 2, 3, 4

∞ Ω

(Continuity should not exist)

4 and 1, 2, 3

SEF249Y

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-101

< COMPONENT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0075, P0081 IVT CONTROL SOLENOID VALVE

Component Description

INFOID:0000000005149105

Intake valve timing control solenoid valve is activated by ON/OFF

pulse duty (ratio) signals from the ECM.

The intake valve timing control solenoid valve changes the oil

amount and direction of flow through intake valve timing control unit

or stops oil flow.

The longer pulse width advances valve angle.

The shorter pulse width retards valve angle.

When ON and OFF pulse widths become equal, the solenoid valve

stops oil pressure flow to fix the intake valve angle at the control

position.

On Board Diagnosis Logic

INFOID:0000000005149106

DTC Confirmation Procedure

INFOID:0000000005149107

1. If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next step.

a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to 

EC-101, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005149108

1.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect intake valve timing control solenoid valve harness connector.

PBIB1842E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0075
0075
(Bank 1)

Intake valve timing control 
solenoid valve circuit

An improper voltage is sent to the ECM 
through intake valve timing control solenoid 
valve.

• Harness or connectors

(Intake valve timing control solenoid valve 
circuit is open or shorted.)

• Intake valve timing control solenoid valve

P0081
0081
(Bank 2)

BBIA0771E

EC-102

< COMPONENT DIAGNOSIS >

[VK56DE]

P0075, P0081 IVT CONTROL SOLENOID VALVE

3. Turn ignition switch ON.

4. Check voltage between intake valve timing control solenoid

valve terminal 2 and ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E2, F32

• IPDM E/R harness connector E119

• Harness for open or short between intake valve timing control solenoid valve and IPDM E/R

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

3.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN

AND SHORT
1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between the following;

ECM terminal 10 and intake valve timing control solenoid valve (Bank 1) terminal 1 or

ECM terminal 11 and intake valve timing control solenoid valve (Bank 2) terminal 1.

Refer to Wiring Diagram.

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

OK

>> GO TO 4.

NG

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

4.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-102, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace malfunctioning intake valve timing control solenoid valve. Refer to 

EC-494

.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "How to Check Terminal"

 and 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005149109

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

1. Disconnect intake valve timing control solenoid valve harness connector.

1.

Intake valve timing control position 
sensor (bank 2)

2.

Intake valve timing control solenoid 
valve (bank 2)

3.

Drive belt

4.

Radiator hose

5.

Intake valve timing control solenoid 
valve (bank 1)

6.

Intake valve timing control position 
sensor (bank 1)

Voltage: Battery voltage

PBIB0351E

Continuity should exist.

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-103

< COMPONENT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2. Check resistance between intake valve timing control solenoid

valve terminals as follows.

If NG, replace intake valve timing control solenoid valve. Refer to

EC-494

.

If OK, go to next step.

3. Remove intake valve timing control solenoid valve. Refer to 

EC-

494

.

4. Provide 12 V DC between intake valve timing control solenoid

valve terminals and then interrupt it. Make sure that the plunger

moves as shown in the figure.

CAUTION:

Do not apply 12 V DC continuously for 5 seconds or more.

Doing so may result in damage to the coil in intake valve

timing control solenoid valve.

If NG, replace intake valve timing control solenoid valve. Refer to

EC-494

.

NOTE:

Always replace O-ring when intake valve timing control

solenoid valve is removed.

Terminals

Resistance

1 and 2

7.1 - 7.7 

Ω [at 20°C (68°F)]

1 or 2 and ground

∞Ω

(Continuity should not exist)

MBIB0027E

PBIB2388E

 

 

 

 

 

 

 

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