Infiniti QX56 (Z62). Manual - part 600

 

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Infiniti QX56 (Z62). Manual - part 600

 

 

EC-378

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0607 ECM

P0607 ECM

DTC Logic

INFOID:0000000006217877

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-378, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217878

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Perform DTC Confirmation Procedure.
See 

EC-378, "DTC Logic"

.

4.

Check DTC.

Is the DTC P0607 displayed again?

YES

>> Replace ECM. Refer to 

EC-535, "Removal and Installation"

.

NO

>> INSPECTION END

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0607

ECM
(CAN communication bus)

When detecting error during the initial diagnosis 
of CAN controller of ECM.

• ECM

P0611 ECM PROTECTION

EC-379

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

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P0611 ECM PROTECTION

Description

INFOID:0000000006288344

This DTC is detected when the ECM protective function is activated due to an extreme temperature increase
in ECM, resulting from severe conditions such as heavy load driving.

DTC Logic

INFOID:0000000006288345

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

This DTC is displayed as protection function history. If no malfunction is detected after the diagnosis, the cus-
tomer must be informed of the activation of the protection function.

>> Proceed to 

EC-379, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006288346

1.

INSPECTION START

1.

Perform DTC confirmation procedure. Refer to 

EC-379, "DTC Logic"

.

2.

Check 1st trip DTC.

Is DTC P0605 detected?

YES

>> Proceed to 

EC-376, "Diagnosis Procedure"

.

NO

>> Explain the customer about the activation of the protection function.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0611

ECM PROTECTION

ECM overheat protection control is activated.

ECM overheated

EC-380

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P062B ECM

P062B ECM

Description

INFOID:0000000006217879

This DTC is detected when the ECM-integrated injector driver unit has a malfunction. For injector driver unit,
refer to 

EC-23, "ECM"

.

DTC Logic

INFOID:0000000006217880

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine and keep the engine speed at idle for 30 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-380, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217881

1.

CHECK FUEL INJECTOR

Perform fuel injector. Refer to 

EC-498, "Component Function Check"

.

Is inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Perform DTC cfirmation procedure again. Refer to 

EC-380, "DTC Logic"

.

4.

Check 1st trip DTC.

Is the DTC P062B displayed again?

YES

>> Replace ECM. Refer to 

EC-535, "Removal and Installation"

.

NO

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P062B

Internal control module fuel injector 
control performance

Injector driver unit is malfunctioning.

• Harness and connectors

(Injector circuit is open or 
shorted)

• Battery power supply
• ECM (injector driver unit)

P0643 SENSOR POWER SUPPLY

EC-381

< DTC/CIRCUIT DIAGNOSIS >

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P0643 SENSOR POWER SUPPLY

DTC Logic

INFOID:0000000006217882

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 8 V or more at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-381, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217883

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect accelerator pedal position (APP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0643

SENSOR POWER/CIRC
(Sensor power supply circuit 
short)

ECM detects that the voltage of 
power source for sensor is ex-
cessively low or high.

• Harness or connectors

(Accelerator pedal position sensor 1 circuit is shorted.)
[Camshaft position sensor (bank 2) circuit is shorted.]
[Manifold absolute pressure (MAP) sensor circuit is 
shorted.]
(Throttle position sensor circuit is shorted.)

• Accelerator pedal position sensor 1
• Camshaft position sensor (bank 2)
• Manifold absolute pressure (MAP) sensor
• Throttle position sensor

APP sensor

Ground

Voltage (V)

Connector

Terminal

E110 (Without ICC)

2

Ground

Approx. 5

E67 (With ICC)

12

 

 

 

 

 

 

 

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