Infiniti G35 (V35) Sedan. Manual - part 1142

LUMBAR SUPPORT SWITCH

SE-35

< COMPONENT DIAGNOSIS >

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LUMBAR SUPPORT SWITCH

Description

INFOID:0000000000960519

Lumbar support switch controls the power supplied to lumbar support motor.

Component Function Check

INFOID:0000000000960520

1.

CHECK LUMBAR SUPPORT SWITCH FUNCTION

Check lumbar support operation with lumbar support switch.

Is the inspection results normal?

YES

>> Lumbar support switch is OK.

NO

>> Refer to 

SE-35, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000000960521

1.

CHECK LUMBAR SUPPORT SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect lumbar support switch connector.

3.

Check voltage between lumbar support switch connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace circuit.

2.

CHECK LUMBAR SUPPORT SWITCH GROUND CIRCUIT

Check continuity between lumbar support switch connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace circuit.

3.

CHECK LUMBAR SUPPORT SWITCH

Check lumbar support switch.
Refer to 

SE-35, "Component Inspection"

.

Is the inspection result normal?

YES

>> Lumbar support switch is OK.

NO

>> Replace lumbar support switch.

Component Inspection

INFOID:0000000000960522

1.

CHECK LUMBAR SUPPORT SWITCH

1.

Disconnect lumbar support switch connector.

2.

Check continuity between lumbar support switch terminals.

 Lumbar support switch 

Ground

Voltage

Connector

Terminal

B457

33

Battery voltage

 Lumbar support switch connector

Terminal

Ground

Continuity

B457

48

Existed

SE-36

< COMPONENT DIAGNOSIS >

LUMBAR SUPPORT SWITCH

Is the inspection result normal?

YES

>> Lumbar support switch is OK.

NO

>> Replace lumbar support switch. Refer to 

SE-111, "Removal and Installation"

.

Terminal

Switch condition

Continuity

57

33

Forward

Existed

Other than above

Not existed

58

Backward

Existed

Other than above

Not existed

57

48

Backward

Existed

Other than above

Not existed

58

Forward

Existed

Other than above

Not existed

LUMBAR SUPPORT MOTOR

SE-37

< COMPONENT DIAGNOSIS >

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LUMBAR SUPPORT MOTOR

Description

INFOID:0000000000960523

With the power supplied to lumbar support switch, lumbar support motor operates the forward and backward
movement of seatback support device.

Component Function Check

INFOID:0000000000960524

1.

CHECK LUMBAR SUPPORT MOTOR FUNCTION

Check lumbar support operation with lumbar support switch.
Is the inspection results normal?

YES

>> Lumbar support motor is OK.

NO

>> Refer to 

SE-37, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000000960525

1.

CHECK LUMBAR SUPPORT MOTOR POWER SUPPLY

1.

Disconnect lumbar support motor connector.

2.

Check voltage between lumbar support motor connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK LUMBAR SUPPORT MOTOR CIRCUIT

1.

Disconnect lumbar support switch connector.

2.

Check continuity between lumbar support switch and lumbar support motor.

3.

Check continuity between lumbar support switch and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Repair or replace circuit.

3.

CHECK LUMBAR SUPPORT MOTOR

Check lumbar support motor.
Refer to 

SE-38, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Replace lumbar support motor.

 Lumbar support motor 

Ground

Lumbar support 
switch condition

Voltage (V)

Approx.

Connector

Terminal

B458

57

Forward position

Battery voltage

Other than above

0

58

Backward position

Battery voltage

Other than above

0

 Lumbar support switch 

connector

Terminal

Lumbar support motor

Terminal

Continuity

B457

57

B458

57

Existed

58

58

 Lumbar support switch connector

Terminal

Ground

Continuity

B457

57

Not existed

58

SE-38

< COMPONENT DIAGNOSIS >

LUMBAR SUPPORT MOTOR

Component Inspection

INFOID:0000000000960526

1.

CHECK LUMBAR SUPPORT MOTOR-I

Check visually the lumbar support motor to see if any foreign object is not disturbing the functionment or if the
lumbar support motor is not broken.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace lumbar support motor.

2.

CHECK LUMBAR SUPPORT MOTOR-II 

1.

Turn ignition switch OFF.

2.

Disconnect lumbar support motor connector.

3.

Supply lumbar support motor terminals with battery voltage and check operation.

Is the inspection result normal?

YES

>> Lumbar support motor is OK..

NO

>> Replace lumbar support motor.

Terminal

Operation

(+)

(–)

57

58

Forward

58

57

Backward