Infiniti G37 Coupe. Manual - part 1090

 

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Infiniti G37 Coupe. Manual - part 1090

 

 

SE-28

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (DRIVER SEAT C/U)

ACTIVE TEST

CAUTION:

When driving vehicle, do not perform active test.

*: Driver seat without automatic driver position system display only “SEAT SLIDE”.

Test item

Description

SEAT SLIDE*

Activates/deactivates the sliding motor.

SEAT RECLINING

Activates/deactivates the reclining motor.

SEAT LIFTER FR

Activates/deactivates the lifting motor (front).

SEAT LIFTER RR

Activates/deactivates the lifting motor (rear).

TILT MOTOR

Activates/deactivates the tilt motor.

TELESCO MOTOR

Activates/deactivates the telescopic motor.

MIRROR MOTOR RH

Activates/deactivates the mirror motor (passenger side).

MIRROR MOTOR LH

Activates/deactivates the mirror motor (driver side).

MEMORY SW INDCTR

Turns ON/OFF the memory indicator.

U1000 CAN COMM CIRCUIT

SE-29

< COMPONENT DIAGNOSIS >

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COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000001729811

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000001729812

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

STEP 1

Turn ignition switch ON and wait at least 3 seconds.

>> GO TO 2.

2.

STEP 2

Check “Self Diagnostic Result” with CONSULT-III.

Is the DTC detected?

YES

>> Perform diagnosis procedure. Refer to 

SE-29, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001729813

Refer to 

LAN-16, "Trouble Diagnosis Flow Chart"

.

Special Repair Requirement

INFOID:0000000001729814

Refer to 

SE-7, "ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMINAL : Special

Repair Requirement"

.

DTC

Trouble diagnosis 

name

DTC detecting condition

Possible cause

U1000

CAN COMM CIR-
CUIT

• Driver seat control unit cannot communicate to other 

control units.

• Driver seat control unit cannot communicate for more 

than the specified time.

• Harness or connectors

(CAN communication line is 
open or shorted)

SE-30

< COMPONENT DIAGNOSIS >

B2112 SLIDING MOTOR

B2112 SLIDING MOTOR

Description

INFOID:0000000001729815

• The seat sliding motor is installed on the seat cushion frame.
• The seat sliding motor is activated with the driver seat control unit.
• Slides the seat forward/backward by changing the rotation direction of sliding motor.

DTC Logic

INFOID:0000000001729816

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

STEP 1

Turn ignition switch ON.

>> GO TO 2.

2.

STEP 2

Check “Self Diagnostic Result” with CONSULT-III.

Is the DTC detected? 

YES

>> Perform diagnosis procedure. Refer to 

SE-30, "Diagnosis Procedure"

.

NO

>> INSPECTION END

NOTE:
First perform diagnosis for B2126 or B2127 if B2126 or B2127 is detected.

Diagnosis Procedure

INFOID:0000000001729817

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Check “Self Diagnostic Result” with CONSULT-III.

3.

Erase the DTC.

4.

Perform DTC confirmation procedure. Refer to 

SE-30, "DTC Logic"

.

Is the DTC displayed again?

YES

>> GO TO 2.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

2.

REPLACE DRIVER SEAT CONTROL UNIT

Replace driver seat control unit. Refer to 

SE-164, "Removal and Installation"

.

>> INSPECTION END

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2112

SEAT SLIDE

The driver seat control unit detects the output of slid-
ing motor output terminal for 0.1 second or more 
even if the sliding switch is not input.

• Driver seat control unit

POWER SUPPLY AND GROUND CIRCUIT

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< COMPONENT DIAGNOSIS >

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POWER SUPPLY AND GROUND CIRCUIT

AUTOMATIC DRIVE POSITIONER CONTROL UNIT

AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Diagnosis Procedure

INFOID:0000000001694221

NOTE:
Do not disconnect the battery negative terminal and the driver seat control unit connector until DTC is con-
firmed with CONSULT-III.

1.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Check voltage between automatic drive positioner control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>>

Check the following.

• Repair or replace harness between driver seat control unit and fuse block (J/B).
• Circuit breaker

2.

CHECK GROUND CIRCUIT

Check continuity between the automatic drive positioner control unit harness connector and ground.

Is the inspection result normal?

YES

>> Automatic drive positioner control unit power supply and ground circuit are OK.

NO

>> Repair or replace harness between automatic drive positioner control unit and ground.

AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Special Repair Requirement

INFOID:0000000001694222

1.

PERFORM ADDITIONAL SERVICE

Perform additional service when removing battery negative terminal.

>> Refer to 

SE-7, "ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMINAL :

Description"

.

DRIVER SEAT CONTROL UNIT

DRIVER SEAT CONTROL UNIT : Diagnosis Procedure

INFOID:0000000001694217

NOTE:
Do not disconnect the battery negative terminal and the driver seat control unit connector until DTC is con-
firmed with CONSULT-III.

1.

CHECK POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Check voltage between driver seat control unit harness connector and ground.

Terminals

Voltage (V)

(Approx.)

(+)

(–)

Automatic drive positioner control 

unit connector

Terminal

M52

34

Ground

Battery voltage

39

Automatic drive positioner control 

unit connector

Terminal

Ground

Continuity

M52

40

Existed

48

 

 

 

 

 

 

 

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