Infiniti M45 (Y34). Manual - part 757

AUTOMATIC DRIVE POSITIONER

SE-49

C

D

E

F

G

H

J

K

L

M

A

B

SE

2. 

CHECK LCU

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

SE-46, "COMMUNICATION DIAGNOSIS"

 .

OK or NG

OK

>> Replace LCU.

NG

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

COMMUNICATION SYSTEM C

1. 

CHECK HARNESS CONNECTOR

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

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminals and connectors.

2. 

CHECK BCM

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

SE-46, "COMMUNICATION DIAGNOSIS"

 .

OK or NG

OK

>> Replace BCM.

NG

>> Repair the harness between the LCU and BCM control.

SWITCH MONITOR

Perform the diagnosis for the switch system input to each control unit.

Operation Procedure

Diagnosis Result Display

●

Detects the status change (switch ON/OFF operation) of the switch to be checked, and turns on/off the
indicator lamps (the map lamp and step lamp). Also sounds the buzzer (the key remainder and light
remainder) for 0.5 seconds.

PIIA2869E

SE-50

AUTOMATIC DRIVE POSITIONER

●

If a malfunction is detected, no indicator lamp and buzzer react.

Diagnosis Item

The status of the switch (except the ignition switch, interior lamp switch, and map lamp switch) 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.

●

When the ignition switch is turned OFF.

●

The vehicle speed becomes 7 km/h (4 MPH) or higher.

PIIA0185E

Control unit 

Item

BCM

Detente switch

Steering wheel position switch (telescopic switch and tilt switch)

Seat memory switch (memory switch 1, memory switch 2, and setting switch)

Driver door switch

Door mirror remote control switch

Driver seat control unit

Slide switch (FR/RR)

Reclining switch (FR/RR)

Front end lifting switch (UP/DOWN)

Rear end lifting switch (UP/DOWN)

AUTOMATIC DRIVE POSITIONER

SE-51

C

D

E

F

G

H

J

K

L

M

A

B

SE

ON BOARD DIAGNOSIS FOR AUTOMATIC DRIVE POSITIONER

Check the operations of the auto drive positioner system.

*1: If no malfunction is indicated, On board diagnosis for automatic drive positioner will end after the vehicle
speed sensor diagnosis is performed.
*2: Diagnosis ends after self-diagnostic results have been indicated for 10 minutes if left unattended.

PIIA4472E

SE-52

AUTOMATIC DRIVE POSITIONER

Diagnostic Result Display

●

The malfunctioning items are indicated by how many times LEDs on the seat memory switches 1 and 2
flash simultaneously.

●

If the vehicle speed is less than 7 km/h (4 MPH) for 15 seconds after the diagnosis for the seat and steer-
ing wheel systems were completed, the vehicle speed signal is judged malfunctioning.

●

If LH door mirror is malfunctioning, only indicator lamp on the memory switch 1 flashes, and if RH door
mirror is malfunctioning, only indicator lamp on the memory switch 2 flashes.

●

When all the diagnosis are finished normally, the indicator lamps on the memory switches 1 and 2 go off
after the vehicle speed signal diagnosis.

●

If there are multiple malfunctioning parts, the lamps indicate them in sequence from the smallest diagno-
sis trouble code.

●

The diagnosis results repeat until the diagnosis mode is cancelled.

PIIA0190E