Infiniti G37 Coupe. Manual - part 14

ADP-50

< COMPONENT DIAGNOSIS >

B2113 RECLINING MOTOR

B2113 RECLINING MOTOR

Description

INFOID:0000000001693656

• The seat reclining motor is installed on the seatback frame.
• The seat reclining motor is activated with the driver seat control unit.
• Tilts the seatback frontward/rearward by changing the rotation direction of reclining motor.

DTC Logic

INFOID:0000000001693657

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 

ADP-50, "Diagnosis Procedure"

.

NO

>> INSPECTION END

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

Diagnosis Procedure

INFOID:0000000001693658

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 

ADP-50, "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 

ADP-236, "Removal and Installation"

.

>> INSPECTION END

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2113

SEAT RECLINING

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

• Driver seat control unit

B2118 TILT SENSOR

ADP-51

< COMPONENT DIAGNOSIS >

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B2118 TILT SENSOR

Description

INFOID:0000000001693659

• The tilt sensor is installed on the steering column assembly.
• The resistance of tilt sensor is changed according to the up/down position of steering column.
• The terminal voltage of automatic drive positioner control unit will be changed according to a change of tilt

sensor resistance. Automatic drive positioner control unit calculates the tilt position from the voltage.

DTC Logic

INFOID:0000000001693660

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 

ADP-51, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001693661

1.

CHECK TILT SENSOR SIGNAL

1.

Turn ignition switch ON.

2.

Select “TILT SEN” in “Data Monitor” mode with CONSULT-III. 

3.

Check tilt sensor signal under the following condition. 

Is the value normal?

YES

>> GO TO 7.

NO

>> GO TO 2.

2.

CHECK TILT SENSOR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect automatic drive positioner control unit connector and tilt & telescopic sensor connector.

3.

Check continuity between automatic drive positioner control unit harness connector and tilt & telescopic
sensor harness connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2118

TILT SENSOR

The input voltage of tilt sensor is 0.1 V or less or 4.9 
V or more.

• Harness and connectors

(Tilt sensor circuit is opened/
shorted, tilt sensor power supply 
circuit is opened/shorted.)

• Tilt sensor
• Automatic drive positioner con-

trol unit

Monitor item

Condition

Value

TILT SEN

Tilt position

Change between 

1.2 V (close to top)

3.4 V (close to bottom)

ADP-52

< COMPONENT DIAGNOSIS >

B2118 TILT SENSOR

4.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK TILT SENSOR POWER SUPPLY

1.

Connect automatic drive positioner control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between tilt & telescopic sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK TILT SENSOR POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect automatic drive positioner control unit connector.

3.

Check continuity between automatic drive positioner control unit harness connector and tilt & telescopic
sensor harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

5.

CHECK TILT SENSOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect automatic drive positioner control unit connector.

3.

Check continuity between automatic drive positioner control unit harness connector and tilt & telescopic
sensor harness connector.

Is the inspection result normal?

YES

>> GO TO 6.

Automatic drive positioner

control unit connector

Terminal

Tilt & telescopic sensor

connector

Terminal

Continuity

M51

7

M48

3

Existed

Automatic drive positioner

control unit connector

Terminal

Ground

Continuity 

M51

7

Not existed

Terminals

Voltage (V)

(Approx.)

(+)

(–)

Tilt & telescopic sensor

Terminal

M48

1

Ground

5

Automatic drive positioner

control unit connector

Terminal

Tilt & telescopic sensor

connector

Terminal

Continuity

M52

33

M48

1

Existed

Automatic drive positioner con-

trol unit connector

Terminal

Ground

Continuity 

M52

33

Not existed

Automatic drive positioner

control unit connector

Terminal

Tilt & telescopic sensor

connector

Terminal

Continuity

M52

41

M48

4

Existed

B2118 TILT SENSOR

ADP-53

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NO

>> Repair or replace harness.

6.

CHECK DOOR MIRROR OPERATION

1.

Connect automatic drive positioner control unit connector and tilt & telescopic sensor connector.

2.

Turn ignition switch ON.

3.

Check door mirror operation with memory function.

Is the operation normal?

YES

>> Replace tilt & telescopic sensor. (Built in steering column assembly.)

NO

>> Replace automatic drive positioner control unit.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace automatic drive positioner control unit.

NO

>> Repair or replace the malfunctioning part.