Nissan Altima L32. Instruction — part 1401

EPS CONTROL UNIT

STC-23

< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

EPS CONTROL UNIT

Removal and Installation

INFOID:0000000004205843

REMOVAL

1. Remove audio/navi unit. Refer to

AV-72, "Removal and Installation"

or

AV-437, "Removal and Installation"

(with navi).

2. Remove power steering control unit (1).
3. Disconnect power steering control unit connector.

INSTALLATION

Installation is in the reverse order of removal.

ALGIA0031ZZ

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ENGINE

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SECTION

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CONTENTS

STARTING SYSTEM

QR25DE

BASIC INSPECTION . . . . . . . . .

3

DIAGNOSIS AND REPAIR WORKFLOW . . ..

3

Work Flow . . . . . . . . . . . . . . . .....

3

FUNCTION DIAGNOSIS . . . . . . . ...

6

STARTING SYSTEM . . . . . . . . . . ...

6

System Diagram . . . . . . . . . . . . . ....

6

System Description . . . . . . . . . . . . ...

6

Component Description . . . . . . . . . . ....

7

COMPONENT DIAGNOSIS . . . . . . ..

8

B TERMINAL CIRCUIT . . . . . . . . . ...

8

Description . . . . . . . . . . . . . . . ....

8

Diagnosis Procedure . . . . . . . . . . . .....

8

S CONNECTOR CIRCUIT . . . . . . . . ...

9

Description . . . . . . . . . . . . . . . ....

9

Diagnosis Procedure . . . . . . . . . . . .....

9

STARTING SYSTEM . . . . . . . . . . ..

10

Wiring Diagram - Coupe . . . . . . . . . . ..

10

Wiring Diagram - Sedan . . . . . . . . . . ..

16

SYMPTOM DIAGNOSIS . . . . . . . ..

22

STARTING SYSTEM . . . . . . . . . . ..

22

Symptom Table . . . . . . . . . . . . . ...

22

PRECAUTION . . . . . . . . . . . ..

23

PRECAUTIONS . . . . . . . . . . . . ..

23

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" . . . . . . . . . . . . . . . . .

23

Necessary for Steering Wheel Rotation After Bat-
tery Disconnect . . . . . . . . . . . . . ...

23

PREPARATION . . . . . . . . . . ...

24

PREPARATION . . . . . . . . . . . . .

24

Special Service Tool . . . . . . . . . . . .

24

Commercial Service Tool . . . . . . . . . .

24

ON-VEHICLE REPAIR . . . . . . . . .

25

STARTER MOTOR . . . . . . . . . . ...

25

Removal and Installation . . . . . . . . . . .

25

Removal and Installation . . . . . . . . . . .

25

Disassembly and Assembly . . . . . . . . . .

25

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .

28

STARTER MOTOR . . . . . . . . . . ...

28

Starter . . . . . . . . . . . . . . . . . ..

28

VQ35DE

BASIC INSPECTION . . . . . . . . ...

29

DIAGNOSIS AND REPAIR WORKFLOW . .

29

Work Flow . . . . . . . . . . . . . . . .

29

FUNCTION DIAGNOSIS . . . . . . . ..

32

STARTING SYSTEM . . . . . . . . . . .

32

System Diagram . . . . . . . . . . . . . ..

32

System Description . . . . . . . . . . . . ..

32

Component Description . . . . . . . . . . ..

33

COMPONENT DIAGNOSIS . . . . . . .

34

B TERMINAL CIRCUIT . . . . . . . . . .

34

Description . . . . . . . . . . . . . . . ...

34

Diagnosis Procedure . . . . . . . . . . . ...

34

S CONNECTOR CIRCUIT . . . . . . . . .

35

Description . . . . . . . . . . . . . . . ...

35

Diagnosis Procedure . . . . . . . . . . . ...

35

STARTING SYSTEM . . . . . . . . . . .

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Wiring Diagram - Coupe . . . . . . . . . . ..

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Wiring Diagram - Sedan . . . . . . . . . . ..

42

STR-2

SYMPTOM DIAGNOSIS . . . . . . . .

48

STARTING SYSTEM . . . . . . . . . . .

48

Symptom Table . . . . . . . . . . . . . ..

48

PRECAUTION . . . . . . . . . . . .

49

PRECAUTIONS . . . . . . . . . . . . .

49

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" . . . . . . . . . . . . . . . . .

49

Necessary for Steering Wheel Rotation After Bat-
tery Disconnect . . . . . . . . . . . . . ...

49

PREPARATION . . . . . . . . . . ...

50

PREPARATION . . . . . . . . . . . . .

50

Special Service Tool . . . . . . . . . . . ...

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Commercial Service Tool . . . . . . . . . .

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ON-VEHICLE REPAIR . . . . . . . ...

51

STARTER MOTOR . . . . . . . . . . .

51

Removal and Installation . . . . . . . . . . .

51

Removal and Installation . . . . . . . . . . .

51

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . ..

52

STARTER MOTOR . . . . . . . . . . .

52

Starter . . . . . . . . . . . . . . . . . .

52

DIAGNOSIS AND REPAIR WORKFLOW

STR-3

< BASIC INSPECTION >

[QR25DE]

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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OVERALL SEQUENCE

DETAILED FLOW

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