Infiniti QX56 (JA60). Manual - part 785

DIAGNOSIS SYSTEM (BCM)

RF-9

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

RF

N

O

P

RETAINED PWR : CONSULT-III Function (BCM - RETAINED PWR)

INFOID:0000000005370296

DATA MONITOR

ACTIVE TEST

WORK SUPPORT

Monitor Item

[Unit]

Description

IGN ON SW [ON/OFF]

Indicates condition of ignition switch.

DOOR SW-DR [ON/OFF]

Indicates condition of front door switch LH.

DOOR SW-AS [ON/OFF]

Indicates condition of front door switch RH.

Test Item

Description

RETAINED PWR

This test is able to supply RAP signal (power) from BCM (body control module) to power window 
system and power sunroof system (if equipped). Those systems can be operated when turning on 
“RETAINED PWR” on CONSULT-III screen even if the ignition switch is turned OFF.
NOTE:
During this test, CONSULT-III can be operated with ignition switch in OFF position. “RETAINED 
PWR” should be turned “ON” or “OFF” on CONSULT-III screen when ignition switch is ON. Then 
turn ignition switch OFF to check retained power operation. CONSULT-III might be stuck if “RE-
TAINED PWR” is turned “ON” or “OFF” on CONSULT-III screen when ignition switch is OFF.

Work item

Description

RETAINED PWR SET

RAP signal’s power supply period can be changed by mode setting. Selects RAP signal’s power 
supply period between three steps
• MODE1 (45 sec.)/MODE2 (OFF)/MODE 3 (2 min.).

RF-10

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

COMPONENT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

SUNROOF MOTOR ASSEMBLY
SUNROOF MOTOR ASSEMBLY : Diagnosis Procedure

INFOID:0000000005147278

Regarding Wiring Diagram information, refer to 

RF-34, "Wiring Diagram"

.

SUNROOF MOTOR ASSEMBLY

1.

 CHECK SUNROOF MOTOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect sunroof motor assembly connector R4.

3. Turn ignition switch ON.

4. Check voltage between sunroof motor assembly connector R4

terminals 1 and 5 and ground.

Is the voltage as specified?

YES

>> GO TO 4

NO

>> GO TO 2

2.

 CHECK SUNROOF MOTOR POWER SUPPLY 

1. Turn ignition switch OFF.

2. Disconnect BCM connector M20.

3. Check continuity between BCM connector M20 (A) and sunroof

motor assembly connector R4 (B).

4. Check continuity between BCM connector M20 (A) and ground.

Are the continuity test results as specified?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK BCM OUTPUT SIGNAL

(+)

(–)

Voltage

Connector

Terminal 

R4

1

Ground

Battery voltage

5

ALKIA0868ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

M20

68

R4

1

Yes

69

5

A

—

Continuity

Connector

Terminal

M20

68

Ground

No

69

ALKIA0870ZZ

POWER SUPPLY AND GROUND CIRCUIT

RF-11

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

RF

N

O

P

1. Connect BCM connector M20.

2. Turn ignition switch ON.

3. Check voltage between BCM connector M20 and ground.

Is the voltage reading as specified?

YES

>> Check condition of harness and connector.

NO

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

4.

 CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between sunroof motor assembly connector

R4 terminal 7 and ground.

Is the continuity test result as specified?

YES

>> Power supply and ground circuits are OK.

NO

>> Repair or replace harness.

SUNROOF MOTOR ASSEMBLY : Special Repair Requirement

INFOID:0000000005147279

1.

 PERFORM INITIALIZATION PROCEDURE

Perform initialization procedure. 

Refer to 

RF-5, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

.

Does the sunroof motor assembly operate properly?

YES

>> Repair is complete.

NO

>> Check fitting adjustment.

(+)

(–)

Voltage

Connector

Terminal 

M20

68

Ground

Battery voltage

69

ALKIA0871ZZ

Connector

Terminal

—

Continuity 

R4

7

Ground

Yes

ALKIA0869ZZ

RF-12

< COMPONENT DIAGNOSIS >

SUNROOF SWITCH CIRCUIT

SUNROOF SWITCH CIRCUIT

Description

INFOID:0000000005147280

The BCM supplies power to the integrated CPU of the sunroof motor assembly. The tilt and slide functions of

the sunroof motor assembly is controlled by the sunroof switch. 

Component Function Check

INFOID:0000000005147281

1.

 CHECK SUNROOF MOTOR FUNCTION

Do tilt up/down & slide open/close functions operate normally with sunroof switch?
Is the inspection result normal?

YES

>> Sunroof motor assembly is OK.

NO

>> Refer to 

RF-12, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005147282

Regarding Wiring Diagram information, refer to 

RF-34, "Wiring Diagram"

.

1.

 CHECK SUNROOF SWITCH INPUT SIGNAL 

1. Turn ignition switch ON.

2. Check voltage between sunroof switch connector and ground.

Are the voltage measurements as specified?

YES

>> Sunroof switch is operating normally. 

NO

>> GO TO 2

2.

 CHECK SUNROOF SWITCH CIRCUITS

1. Turn ignition switch OFF.

2. Disconnect sunroof motor assembly connector R4 and sunroof

switch connector R104.

3. Check continuity between sunroof switch connector R104 (A)

and sunroof motor assembly connector R4 (B).

Connector

Terminals

Sunroof switch position

Voltage (V)

(Approx.)

(+)

(–)

R104

1

2

SLIDE CLOSE

0V

Other than above

Battery voltage

3

SLIDE OPEN

0V

Other than above

Battery voltage

4

TILT UP

0V

Other than above

Battery voltage

6

TILT DOWN

0V

Other than above

Battery voltage

ALKIA1041GB

ALKIA0873ZZ