Infiniti QX56 (JA60). Manual - part 103

BCS

DIAGNOSIS SYSTEM (BCM)

BCS-31

< FUNCTION DIAGNOSIS >

[BCM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

ACTIVE TEST

PANIC ALARM
PANIC ALARM : CONSULT-III Function (BCM - PANIC ALARM)

INFOID:0000000005370265

ACTIVE TEST

DOOR SW-DR [ON/OFF]

Indicates switch status input from front door switch LH

DOOR SW-AS [ON/OFF]

Indicates switch status input from front door switch RH

DOOR SW-RR [ON/OFF]

Indicates switch status input from rear door switch RH

DOOR SW-RL [ON/OFF]

Indicates switch status input from rear door switch LH

BACK DOOR SW [ON/OFF]

Indicates switch status input from back door switch

KEY CYL LK-SW [ON/OFF]

Indicates lock switch status from door key cylinder switch

KEY CYL UN-SW [ON/OFF]

Indicates unlock switch status from door key cylinder switch

CDL LOCK SW [ON/OFF]

Indicates lock switch status from door lock and unlock switch

CDL UNLOCK SW [ON/OFF]

Indicates unlock switch status from door lock and unlock switch

Monitor Item

[Unit]

Description

Test Item

Description

THEFT IND

This test is able to check security indicator lamp operation. The lamp will be turned on when “ON” 
on CONSULT-III screen is touched.

VEHICLE SECURITY HORN

This test is able to check vehicle security horn operation. The horns will be activated for 0.5 sec-
onds after “ON” on CONSULT-III screen is touched.

HEADLAMP(HI)

This test is able to check vehicle security lamp operation. The headlamps will be activated for 0.5 
seconds after “ON” on CONSULT-III screen is touched.

Test Item

Description

HEAD LAMP (HI)

This test is able to check head lamp (HI) operation.

PANIC ALARM

This test is able to check panic alarm operation.

BCS-32

< COMPONENT DIAGNOSIS >

[BCM]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000005146415

Refer to 

LAN-44, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000005146416

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005146417

1.

 PERFORM SELF DIAGNOSTIC

1. Turn ignition switch ON and wait for 2 seconds or more.

2. Check “Self Diagnostic Result” of BCM.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-14, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

DTC

CONSULT-III display 

description

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When BCM cannot communicate CAN com-
munication signal continuously for 2 sec-
onds or more.

Any item (or items) of the following listed below is 
malfunctioning in CAN communication system.
• Transmission
• Receiving (ECM)
• Receiving (METER/M&A)
• Receiving (TCM)
• Receiving (MULTI AV)
• Receiving (IPDM E/R)
• Receiving (I-KEY)

BCS

POWER SUPPLY AND GROUND CIRCUIT

BCS-33

< COMPONENT DIAGNOSIS >

[BCM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000005146421

Regarding Wiring Diagram information, refer to 

BCS-49, "Wiring Diagram"

.

1.

 CHECK FUSES AND FUSIBLE LINK

Check that the following fuses and fusible link are not blown.

Is the fuse blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM.

3. Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK GROUND CIRCUIT

Terminal No.

Signal name

Fuses and fusible link No.

57

Battery power supply

22 (15A)

70

F (50A)

11

Ignition ACC or ON

4 (10A)

38

Ignition ON or START

59 (10A)

Connector

Terminals 

Power

source

Condition

Voltage (V) (Ap-

prox.)

(+)

(-)

M18

11

Ground

ACC 

power 

supply

Ignition 

switch 

ACC or 

ON

Battery voltage

38

Ground

Ignition 

power 

supply

Ignition 

switch ON 

or START

Battery voltage

M20

57

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

70

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

LIIA2415E

BCS-34

< COMPONENT DIAGNOSIS >

[BCM]

POWER SUPPLY AND GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

BCM

Ground

Continuity

Connector

Terminal

M20

67

Yes

LIIA0915E