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ELECTRICAL POWER STEERING (P/S) SYSTEM
WARNING:
For vehicles equipped with a Supplemental Restraint (Air Bag) System :
• Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to "System Components and Wiring Location View" under "Gen-
eral Description" in Section 10B 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 Precautions"
under "On-Vehicle Service" in Section 10B before performing service on or around the air bag sys-
tem 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.
• 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 ......................................3B1-2
P/S System Construction ............................3B1-2
EPS System Wiring Circuit Diagram ...........3B1-3
Diagnosis .......................................................3B1-4
On-Board Diagnostic System
Description ..................................................3B1-4
Precautions in Diagnosing Troubles ...........3B1-4
EPS System Check.....................................3B1-5
"EPS" Warning Lamp Check .......................3B1-7
DTC Check..................................................3B1-7
DTC Clearance ...........................................3B1-7
Serial Data Link Circuit Check ....................3B1-8
DTC Table.................................................3B1-10
Scan Tool Data .........................................3B1-10
Scan tool data definitions ......................3B1-11
"EPS" Warning Lamp Does Not Come
ON at Ignition Switch ON But Leaving
Engine OFF...............................................3B1-13
"EPS" Warning Lamp Come ON at
Ignition Switch ON But Leaving Engine
OFF ...........................................................3B1-15
DTC C1111 Torque Sensor Main
Circuit Failure ............................................3B1-16
DTC C1113 Torque Sensor Main and
Sub Circuit Failure.....................................3B1-16
DTC C1115 Torque Sensor Sub Circuit
Failure .......................................................3B1-16
DTC C1114 Torque Sensor 5 V Power
Supply Circuit Failure ................................3B1-17
ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-1
SECTION 3B1
CONTENTS
DTC C1121/C1123/C1124 VSS Circuit
Failure ....................................................... 3B1-19
DTC C1122 Engine Speed Signal
Circuit Failure............................................ 3B1-21
DTC C1141/C1142/C1143/C1144/
C1145 Motor Circuit Failure ...................... 3B1-22
DTC C1151 Clutch Circuit Failure............. 3B1-24
DTC C1153 P/S Control Module Power
Supply Circuit Failure................................ 3B1-26
DTC C1152/C1154/C1155 P/S Control
Module Failure .......................................... 3B1-26
Trouble Diagnosis (For Trouble Not
Indicated by On-Board Diagnostic
System)..................................................... 3B1-27
Inspection of P/S Control Module and Its
Circuits ...................................................... 3B1-28
Steering Wheel Play Check ...................... 3B1-30
Steering Force Check ............................... 3B1-30
On-Vehicle Service ..................................... 3B1-31
Steering Column Removal and
Installation................................................. 3B1-31
Checking Steering Column Check After
Accident Damage...................................... 3B1-31
P/S Control Module Removal and
Installation................................................. 3B1-31
Torque Sensor On-Vehicle Inspection ...... 3B1-32
Motor Assembly (with Clutch
Incorporated) On-Vehicle Inspection ........ 3B1-32
Special Tool................................................. 3B1-33
3B1
3C
3D
3E
3F
4A
4B
5
5A
5B
5C
5E
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