Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CALIBRATION OF AUTOMATIC BACK DOOR POSITION INFORMATION
1. Perform initialization setting of automatic back door position information.
  Refer to Work Procedure .
2. Erase DTC, and then repeat "PERFORM DTC CONFIRMATION PROCEDURE".
Is DTC detected?

YES

GO TO 2.

NO

Inspection End.
CHECK INSTALLATION OF BACK DOOR ASSEMBLY
1. Check that back door assembly is installed normally.
  Refer to Adjustment .
2. Check back door assembly mechanism deformation, looseness, rattle, interference with other parts and pinched foreign materials.
Is the inspection result normal?

YES

GO TO 3.

NO

Repair or replace the malfunctioning parts.

CHECK ENCODER SIGNAL

Select "AUTOMATIC BACK DOOR CONTROL MODULE" using CONSULT.
Select "SPINDLE SENSOR LH" and "SPINDLE SENSOR RH" in "DATA MONITOR" mode.

Check that the function operates normally according to the following conditions.

Monitor item	Status
SPINDLE SENSOR LH	0 - 65535
SPINDLE SENSOR RH	0 - 65535

Is the difference between the 2 monitor items 10 or more?

YES

GO TO 4.

Replace automatic back door control module. Refer to Removal and Installation .

CHECK ENCODER POWER SUPPLY

Turn ignition switch OFF.
Disconnect spindle unit connector.

Check voltage between spindle unit harness connector and ground.

(+)			(-)	Voltage (Approx.)
Spindle unit
Connector		Terminal
LH	B70	8	Ground	Battery voltage
RH	B162

Is the inspection result normal?

YES

GO TO 6.

GO TO 5.

CHECK ENCODER CIRCUIT 1

Disconnect automatic back door control module connector.

Check continuity between automatic back door control module harness connector and spindle unit harness connector.

Automatic back door control module		Spindle unit			Continuity
Connector	Terminal	Connector		Terminal
B55	19	LH	B70	8	Yes
	20	RH	B162

Check continuity between automatic back door control module harness connector and ground.

Automatic back door control module		Ground	Continuity
Connector	Terminal
B55	19		No
	20

Is the inspection result normal?

YES

Replace automatic back door control module. Refer to Removal and Installation .

Repair or replace harness.

CHECK ENCODER CIRCUIT 2

Disconnect automatic back door control module connector.

Check continuity between automatic back door control module harness connector and spindle unit harness connector.

Automatic back door control module		Spindle unit			Continuity
Connector	Terminal	Connector		Terminal
B55	6	LH	B70	3	Yes
	7			10
	8	RH	B162	3
	9			10

Check continuity between automatic back door control module harness connector and ground.

Automatic back door control module		Ground	Continuity
Connector	Terminal
B55	6		No
	7
	8
	9

Is the inspection result normal?

YES

GO TO 7.

Repair or replace harness.

CHECK ENCODER CIRCUIT 3

Connect automatic back door control module and spindle unit connector

Check continuity between automatic back door control module harness connector and ground.

Automatic back door control module

Ground

Voltage

(Approx.)

Connector

Terminal

B55

0 V

Is the inspection result normal?

YES

GO TO 8.

Replace automatic back door control module. Refer to Removal and Installation .

CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Is the inspection result normal?

YES

Replace automatic back door control module. Refer to Removal and Installation .

NO

Repair or replace the malfunctioning parts.