Suzuki WagonR+ RB310 Service Manual page 2142

ELECTRICAL POWER STEERING (EPS) SYSTEM
WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:
D Service on and around the air bag system components or wiring must be performed only by an autho-
rized SUZUKI dealer. Refer to "Air Bag System Components and Wiring Location View" under "Gener-
al Description" in air bag system section in order to confirm whether you are performing service on
or near the air bag system components or wiring. Please observe all WARNINGS and "Service Precau-
tions" under "On-Vehicle Service" in air bag system section before performing service on or around
the air bag system components or wiring. Failure to follow WARNINGS could result in unintentional
activation of the system or could render the system inoperative. Either of these two conditions may
result in severe injury.
D Technical service work must be started at least 90 seconds after the ignition switch is turned to the
"LOCK" position and the negative cable is disconnected from the battery. Otherwise, the system may
be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
GENERAL DESCRIPTION
Components . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS
. . . . . . . . . . . . . . . . . . . . . . . . . . .
On-board Diagnosis System
Precautions in Diagnosing Troubles
System Check Flow Table
"EPS" Warning Lamp Circuit Check
Flow Table . . . . . . . . . . . . . . . . . . . . . . . . . .
Table-A "EPS" Warning Lamp Does
Not Light . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table-B "EPS" Warning Lamp Flashes
Table-C "EPS" Warning Lamp Remains
ON (even though diagnosis switch
terminal grounded) . . . . . . . . . . . . . . . . . .
DTC Check . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC Clearance . . . . . . . . . . . . . . . . . . . . . .
Serial Date Link Circuit Check
DTC Table . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1111 Torque Sensor Main Circuit
Fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1113 Torque Sensor Main and
Sub Circuit Fail . . . . . . . . . . . . . . . . . . . . . .
DTC C1115 Torque Sensor Sub Circuit
Fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1114 Torque Sensor 5V Power
Supply Circuit fail . . . . . . . . . . . . . . . . . . . .
ELECTRICAL POWER STEERING (EPS) SYSTEM (IF EQUIPPED) 3B1-1
SECTION 3B1
(IF EQUIPPED)
CONTENTS
. . . . . . . . . . . . . . 3B1- 2
3B1- 2
3B1- 3
3B1- 4
. . . . . . . . . . . 3B1- 4
. . . . . 3B1- 4
. . . . . . . . . . . . . 3B1- 5
3B1- 7
3B1- 8
. . . 3B1-10
3B1-11
3B1-12
3B1-14
. . . . . . . . . . 3B1-15
3B1-17
3B1-18
3B1-18
3B1-18
3B1-19
DTC C1121/C1123/C1124 VSS Circuit
Fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1122 Engine Speed Signal Circuit
Fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1141/C1142/C1143/C1144/
C1145 Motor Circuit Fail
DTC C1151 Clutch Circuit Fail
DTC C1153 P/S Control Module Power
Supply Circuit Fail . . . . . . . . . . . . . . . . . . .
DTC C1152/C1154/C1155 P/S Control
Module Fail . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection of P/S Control Module and Its
Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trouble Diagnosis (for trouble not
indicated by on-board diagnostic
system) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection of Steering Wheel Play
Inspection of Steering Force
ON-VEHICLE SERVICE
P/S Control Module . . . . . . . . . . . . . . . . . .
Torque Sensor . . . . . . . . . . . . . . . . . . . . . . .
Motor Assembly (with clutch
incorporated) . . . . . . . . . . . . . . . . . . . . . . .
Steering Column Assembly
SPECIAL TOOLS
. . . . . . . . . . . . . . . . . . . . . .
3B1-20
3B1-21
. . . . . . . . . . . . . . 3B1-22
. . . . . . . . . . 3B1-23
3B1-24
3B1-24
3B1-25
3B1-27
. . . . . . 3B1-28
. . . . . . . . . . . 3B1-28
. . . . . . . . . . . . . . . . 3B1-29
3B1-29
3B1-30
3B1-30
. . . . . . . . . . . . 3B1-31
3B1-31
3B1