Suzuki GA413, Service Manual

Page: 99 / 1246

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-1
SECTION 3B1
ELECTRICAL POWER STEERING (P/S) SYSTEM
WARNING:
For vehicles equipped with 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 AIR BAG SYSTEM COMPONENTS AND WIRING
LOCATION VIEW of GENERAL 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 PRECAUTIONS of 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.
Technical service work must be started at least 90 seconds after the ignition switch is turned
to the LOCK position and negative cable is disconnected from the battery. Otherwise, the
system may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
CONTENTS
3B1
GENERAL DESCRIPTION 3B1- 2 . . . . . . . . . . . . . . . .
Components 3B1- 2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring diagram 3B1- 3 . . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS 3B1- 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On-board diagnosis system 3B1- 4 . . . . . . . . . . . . .
Precautions in diagnosing troubles 3B1- 4 . . . . . . .
System check flow table 3B1- 5 . . . . . . . . . . . . . . . .
DTC check 3B1- 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC clearance 3B1- 8 . . . . . . . . . . . . . . . . . . . . . . . .
DTC table 3B1- 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table A-MIL circuit check (MIL does
not light) 3B1-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table B-MIL circuit check (MIL flashes) 3B1-10 . . .
Table C-MIL circuit check (MIL remains
ON) 3B1-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table D-P/S control module cannot
communicate through the serial data
circuit 3B1-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1111 Torque sensor main circuit
fail 3B1-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1113 Torque sensor main and sub
circuit fail 3B1-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1115 Torque sensor sub circuit fail 3B1-17 . .
DTC C1114 Torque sensor 5V power
supply circuit fail 3B1-18 . . . . . . . . . . . . . . . . . . . . . .
DTC C1116 Torque sensor 8V power
supply circuit fail 3B1-19 . . . . . . . . . . . . . . . . . . . . . .
DTC C1121/C1123/C1124 VSS circuit fail 3B1-20 .
DTC C1122 Engine speed signal circuit
fail 3B1-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC C1141/C1142/C1143/C1144/C1145
Motor circuit fail 3B1-22 . . . . . . . . . . . . . . . . . . . . . . .
DTC C1151 Clutch circuit fail 3B1-23 . . . . . . . . . . . .
DTC C1153 P/S control module power
supply circuit fail 3B1-24 . . . . . . . . . . . . . . . . . . . . . .
DTC C1152/C1154/C1155 P/S control
module fail 3B1-24 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection of P/S control module and its
circuits 3B1-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trouble diagnosis (for trouble not
indicated by on-board diagnostic
system) 3B1-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering wheel inspection 3B1-28 . . . . . . . . . . . . . . .
Steering force inspection 3B1-28 . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 3B1-29 . . . . . . . . . . . . . . . . . .
P/S control module 3B1-29 . . . . . . . . . . . . . . . . . . . . .
Torque sensor 3B1-29 . . . . . . . . . . . . . . . . . . . . . . . . .
Motor and clutch 3B1-30 . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUE SPECIFICATION 3B1-30 . . .