Index Infiniti Infiniti M35/M45 Y50 - service repair manual 2007 year
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Infiniti M35/M45 Y50. Manual - part 1111
STC-1
STEERING CONTROL SYSTEM
G STEERING
CONTENTS
C
D
E
F
H
I
J
K
L
M
SECTION
STC
A
B
EPS
SYSTEM DESCRIPTION ............................................ 3
Components ............................................................. 3Components (Models with Rear Active Steer) ......... 3Electronically Controlled Power Steering System Function ................................................................... 3Fail-Safe Function .................................................... 4
FAIL-SAFE INPUT/CANCEL CONDITIONS ......... 4
TROUBLE DIAGNOSIS .............................................. 5
How to Perform Trouble Diagnosis .......................... 5
BASIC CONCEPT ................................................. 5
Component Parts Location ....................................... 5Wiring Diagram — EPS — ....................................... 6Control Unit Input/Output Signal Standard ............... 8
STANDARD BY CIRCUIT TESTER AND OSCIL-LOSCOPE ............................................................. 8
For Fast and Accurate Trouble Diagnosis ................ 9Basic Inspection ....................................................... 9
POWER SUPPLY CIRCUIT TERMINAL LOOSE-NESS AND BATTERY .......................................... 9
Inspection: Power Steering Control Unit Power Sup-ply Circuit and Ground ............................................. 9Symptom: The Steering Force Does Not Change Smoothly According to the Vehicle Speed ............. 10
RAS
REAR ACTIVE STEER ............................................. 13
Removal and Installation ........................................ 13
COMPONENTS .................................................. 13REMOVAL ........................................................... 13INSTALLATION ................................................... 13
Disassembly and Assembly ................................... 14
COMPONENTS .................................................. 14DISASSEMBLY ................................................... 14INSPECTION AFTER DISASSEMBLY ............... 14ASSEMBLY ......................................................... 14
Neutral Position Adjustment ................................... 14
SYSTEM DESCRIPTION .......................................... 16
Components ........................................................... 16
RAS (Rear Active Steer) Function .......................... 16Fail-Safe Function .................................................. 17
TROUBLE DIAGNOSIS ............................................ 18
How to Perform Trouble Diagnosis ......................... 18
BASIC CONCEPT ............................................... 18
Component Parts Location ..................................... 19Schematic ............................................................... 20Wiring Diagram — RAS — ..................................... 21Control Unit Input/Output Signal Standard ............. 26
CIRCUIT TESTER REFERENCE VALUE ........... 26STANDARD BY CONSULT-II .............................. 27
CONSULT-II Function (RAS/HICAS) ...................... 27
FUNCTION .......................................................... 27CONSULT-II SETTING PROCEDURE ................ 28SELF-DIAG RESULT MODE ............................... 28DATA MONITOR MODE ...................................... 30ACTIVE TEST MODE ......................................... 30RAS CONTROL UNIT PART NUMBER .............. 30
Diagnosis Procedure with Self-Diagnosis Function (Without CONSULT-II) ............................................ 31
DESCRIPTION .................................................... 31SELF-DIAGNOSIS PROCEDURE ...................... 31SELF-DIAGNOSIS DISPLAY .............................. 31SELF-DIAGNOSIS DISPLAY ITEMS .................. 31HOW TO ERASE SELF-DIAGNOSIS ................. 31
CAN Communication .............................................. 31For Fast and Accurate Trouble Diagnosis .............. 32Basic Inspection ..................................................... 32
BASIC INSPECTION 1: POWER SUPPLY CIR-CUIT TERMINAL LOOSENESS AND BATTERY ... 32BASIC INSPECTION 2: RAS WARNING LAMP INSPECTION ...................................................... 32BASIC INSPECTION 3: RAS CONTROL UNIT POWER SUPPLY CIRCUIT AND GROUND CIR-CUIT INSPECTION ............................................. 32
Trouble Diagnosis Chart ......................................... 33
SELF-DIAGNOSIS .............................................. 33DIAGNOSIS CHART BY SYMPTOM .................. 34
Inspection 1: RAS Control Unit Malfunction ........... 35Inspection 2: Motor Power Supply System ............. 35