Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti EX35 2008 Approved files STC
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STEERING
A
SECTION
STEERING CONTROL SYSTEM
STC B
C
D
E
CONTENTS
EPS Diagnosis Procedure ..............................................11
. F
BASIC INSPECTION ................................... 2
. ECU DIAGNOSIS ........................................ 13
.
DIAGNOSIS AND REPAIR WORK FLOW ........ 2
. POWER STEERING CONTROL UNIT .............. 13 STC
Work Flow ................................................................ 2
. Reference Value .....................................................13.
Wiring Diagram - ELECTRONICALLY CON-
FUNCTION DIAGNOSIS .............................. 3
. TROLLED POWER STEERING SYSTEM - ...........14 . H
Fail-Safe .................................................................16
.
EPS SYSTEM ..................................................... 3
.
System Diagram ....................................................... 3
. SYMPTOM DIAGNOSIS ............................. 18
. I
System Description .................................................. 3
.
Component Parts Location ....................................... 5
. UNBALANCE STEERING WHEEL TURNING
Component Description ............................................ 5
. FORCE (TORQUE VARIATION) ....................... 18
Description ..............................................................18
. J
COMPONENT DIAGNOSIS ......................... 6
. Diagnosis Procedure ..............................................18 .
POWER SUPPLY AND GROUND CIRCUIT ...... 6
. PRECAUTION ............................................. 19
. K
Description ............................................................... 6
.
Diagnosis Procedure ................................................ 6
. PRECAUTIONS ................................................. 19
Precaution for Supplemental Restraint System
POWER STEERING SOLENOID VALVE .......... 7
. (SRS) "AIR BAG" and "SEAT BELT PRE-TEN- L
Description ............................................................... 7
. SIONER" ................................................................19
.
Diagnosis Procedure ................................................ 7
. Precaution Necessary for Steering Wheel Rota-
Component Inspection ............................................. 8 . tion after Battery Disconnect ..................................19 . M
ENGINE SPEED SIGNAL CIRCUIT ................... 9
. ON-VEHICLE REPAIR ................................ 20
.
Description ............................................................... 9
.
Diagnosis Procedure ................................................ 9
. POWER STEERING CONTROL UNIT .............. 20 N
Exploded View ........................................................20
.
VEHICLE SPEED SIGNAL CIRCUIT ................11
. Removal and Installation ........................................20
.
Description ............................................................. 11
.
O
P
Revision: 2007 November STC-1 2008 EX35
DIAGNOSIS AND REPAIR WORK FLOW
< BASIC INSPECTION > [EPS]
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow INFOID:0000000003552468
DETAILED FLOW
1.COLLECT THE INFORMATION FROM THE CUSTOMER
It is also important to clarify customer complaints before inspection. First of all, reproduce symptoms and
understand them fully. Ask customer about his/her complaints carefully. In some cases, it is necessary to
check symptoms by driving vehicle with customer.
CAUTION:
Customers are not professional. It is dangerous to make an easy guess like "maybe the customer
means that...," or "maybe the customer mentions this symptom".
>> GO TO 2.
2.CHECK THE STATUS
1. Power steering fluid leakage and check the power steering fluid level. Refer to ST-11, "Inspection".
2. Check the drive belt tension. Refer to EM-13, "Checking".
3. Check the power steering gear for damages, cracks and fluid leakage. Refer to ST-33, "2WD : Inspection"
(2WD models), ST-43, "AWD : Inspection" (AWD models).
4. Check the relief oil pressure. Refer to ST-49, "Inspection".
>> GO TO 3.
3.DIAGNOSIS CHART BY SYMPTOM
Perform the diagnosis by symptom. Refer to STC-18, "Diagnosis Procedure".
>> GO TO 4.
4.FINAL CHECK
Check the input/output standard values for the power steering control unit.
Are the power steering control unit input/output values within standard ranges respectively?
YES >> INSPECTION END
NO >> GO TO 2.
Revision: 2007 November STC-2 2008 EX35
EPS SYSTEM
< FUNCTION DIAGNOSIS > [EPS]
FUNCTION DIAGNOSIS A
EPS SYSTEM
System Diagram INFOID:0000000003552469
B
CONTROL DIAGRAM
C
D
E
F
STC
H
JSGIA0258GB
CROSS-SECTIONAL VIEW
I
J
K
L
M
N
JSGIA0376ZZ
1. Unified meter and A/C amp. 2. Power steering control unit 3. Power steering solenoid valve
O
4. Steering gear assembly 5. Gear housing assembly 6. Gear sub-assembly
7. Pinion 8. Power steering oil pump 9. Reservoir tank
System Description INFOID:0000000003552470 P
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