Infiniti M45 (Y34). Manual - part 203

 

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Infiniti M45 (Y34). Manual - part 203

 

 

POWER DOOR LOCK SYSTEM

BL-37

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On Board Diagnosis

AIS001DG

ON BOARD DIAGNOSTIC RESULTS INDICATOR LAMP
Front map lamps and step lamps (all seats) act as the indicators for the on board diagnosis.

DIAGNOSIS ITEM

COMMUNICATION DIAGNOSIS

Check the communication between BCM and local control unit (LCU).

How to Perform Communication Diagnosis

Description

In this mode, a malfunction code is indicated by the number of flashes from the map lamps and step lamps as
shown below:

After indicator lamp turns on for 2 seconds then off for 2 seconds, it flashes [cycling ON (0.5 sec.)/OFF (0.5
sec.)] to indicate a malfunction code of the first digit. Then, 1.5 second after indicator lamp turns off, it again
flashes [cycling ON (0.5 sec.)/OFF (0.5 sec.)] to indicate a malfunction code of the second digit.
For example, the indicator lamp goes on and off for 0.5 seconds twice and after 1.5 seconds, it goes on and off
for 0.5 seconds four times. This indicates malfunction code of driver door control unit communication.

Diagnosis item

Content

IVMS communication diagnosis

Diagnosis any malfunction or inability of communication between BCM and LCU (DATA 
LINE A-3).

Switch monitor

Monitoring conditions of switches connected to BCM, LCU and Door control unit.

Power door lock system self-diagnosis

Diagnose malfunctions in the each door lock actuator system.

PIIA2871E

SIIA0410E

BL-38

POWER DOOR LOCK SYSTEM

Malfunction Code Table

NOTE:

For a specific local control unit (LCU), either “PAST COMM DATA“ or “PAST NO RESPONSE” may be displayed instead of the
above results. This is caused by the data record, so erase the records.
(The display only shows the error records, they are not malfunctions caused during the diagnosis. One possible cause is that an
reproducible symptom occurred.)

Follow the steps below to erase the memory 
Carry out either disconnect BCM battery power supply or erase memory with CONSULT-II.

With the battery connected, if the local control unit (LCU) connector is disconnected and left for approximately 1 minute, the BCM
stores “NO RESPONSE” record.

Cancel of Communication Diagnosis

If one of the following conditions is satisfied, the communication diagnosis is cancelled.

Turn ignition switch OFF.

Drive the vehicle more than 7 km/h (4 MPH).

Malfunctioning 

item

Display unit

CONSULT–II IVMS communication 

diagnosis content

Self-diagnosis 

trouble code 

No.

Malfunctioning system and 

reference

COMM DATA

One LCU is dis-
played.

POWER WINDOW C/U-DR
“COMM DATA”

24

Replace the displayed 
LCU.

DOOR MIRROR C/U-RH
“COMM DATA”

27

DOOR MIRROR C/U-LH
“COMM DATA”

37

POWER SEAT C/U-DR
“COMM DATA”

47

Multiple LCUs 
are displayed

BCM
“COMM FAIL1”, “COMM FAIL2”

Displays in 
order of 24 

27

37

47

and cycles 

from 24.

Communication system A: 
Refer to 

BL-39, "COMMU-

NICATION SYSTEM A"

 .

NO
RESPONSE

One LCU is dis-
played.

POWER WINDOW C/U-DR
“NO RESPONSE”

25

Communication system B: 
Refer to 

BL-39, "COMMU-

NICATION SYSTEM B"

 .

DOOR MIRROR C/U-RH
“NO RESPONSE”

28

DOOR MIRROR C/U-LH
“NO RESPONSE”

38

POWER SEAT C/U-DR
“NO RESPONSE”

48

Multiple LCUs 
are displayed

BCM/HARNESS

Displays in 
order of 
25

28

38

4

8 and cycles 
from 25.

Communication system C: 
Refer to 

BL-39, "COMMU-

NICATION SYSTEM C"

 .

SLEEP malfunc-
tion

One LCU is dis-
played.

POWER WINDOW C/U-DR
“SLEEP”

No self-diagno-
sis function

Replace the displayed 
LCU.

DOOR MIRROR C/U-RH 
“SLEEP”

DOOR MIRROR C/U-LH 
“SLEEP”

POWER SEAT C/U-DR 
“SLEEP”

Multiple LCUs 
are displayed

All the above control units are displayed.

No self-diagno-
sis function

Communication system A: 
Refer to 

BL-39, "COMMU-

NICATION SYSTEM A"

 .

POWER DOOR LOCK SYSTEM

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Ten minutes have passed since the diagnosis result indication start without any diagnosis cancel opera-
tion.

COMMUNICATION SYSTEM A

1. 

BCM INSPECTION

Replace the malfunctioning BCM with a known-good one, and perform the communication diagnosis.
Refer to 

BL-34, "IVMS COMMUNICATION INSPECTION"

  (with CONSULT-II), 

BL-37, "COMMUNICATION

DIAGNOSIS"

  (without CONSULT-II).

OK or NG

OK

>> Replace BCM.

NG

>> GO TO 2.

2. 

LCU INSPECTION

1.

Replace with the previously installed BCM.

2.

Replace the LCU with a known-good one, and carry out the communication diagnosis.
Refer to 

BL-34, "IVMS COMMUNICATION INSPECTION"

  (with CONSULT-II), 

BL-37, "COMMUNICA-

TION DIAGNOSIS"

  (without CONSULT-II).

OK or NG

OK

>> Replace LCU.

NG

>> Repair communication harness between the indicated LCU and BCM.

COMMUNICATION SYSTEM B

1. 

CONNECTOR INSPECTION

Check the terminals (at the control unit and harness) on the malfunctioning LCU for disconnection, bend, and
other malfunctions.

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminals and connectors.

2. 

LCU INSPECTION

Replace the LCU with a known-good one, and carry out the communication diagnosis.
Refer to 

BL-34, "IVMS COMMUNICATION INSPECTION"

  (with CONSULT-II), 

BL-37, "COMMUNICATION

DIAGNOSIS"

  (without CONSULT-II).

OK or NG

OK

>> Replace LCU.

NG

>> Repair communication harness between the indicated LCU and BCM.

COMMUNICATION SYSTEM C

1. 

CONNECTOR INSPECTION

Check the terminals (at the control unit and harness) on BCM and LCU for disconnection, bend, misalignment,
and other malfunctions.

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminals and connectors.

2. 

BCM INSPECTION

Replace the BCM with a known-good one, and carry out the communication diagnosis.
Refer to 

BL-34, "IVMS COMMUNICATION INSPECTION"

  (with CONSULT-II), 

BL-37, "COMMUNICATION

DIAGNOSIS"

  (without CONSULT-II).

OK or NG

OK

>> Replace BCM.

NG

>> Repair the communication harness between LCU and BCM.

BL-40

POWER DOOR LOCK SYSTEM

SWITCH MONITOR
How to Perform Switch Monitor

Description

In this mode, when BCM detects the input signal from a switch in IVMS as shown below, the detection is indi-
cated by the map lamp and step lamps with buzzer.

Switch Monitor Item

The status of the switch (except the ignition switch, interior lamp ill switch, and map lamp switch) as input to
each control unit can be monitored.

Cancel of Switch Monitor

If one of the following conditions is satisfied, the switch monitor is cancelled.

Turn ignition switch OFF.

Drive the vehicle at more than 7 km/h (4 MPH).

PIIA2869E

PIIA0177E

Control unit name

Item

BCM

All door switch

Electronic key (lock / unlock switch and trunk switch)

Driver door control unit (LCU01)

Door lock and unlock switch (LOCK / UNLOCK)

Front door key cylinder switch

Driver door unlock sensor

Passenger door control unit

Passenger door unlock sensor

Rear LH door control unit

Rear LH door unlock sensor

Rear RH door control unit

Rear RH door unlock sensor

 

 

 

 

 

 

 

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