2000 SUZUKI SWIFT ignition

3B1-2 ELECTRICAL POWER STEERING (P/S) SYSTEM
STEERING FORCE INSPECTION ........... 3B1-28
ON-VEHICLE SERVICE ............................... 3B1-29
P/S CONTROL MODULE ......................... 3B1-29
TORQUE SENSOR .................................. 3B1-29MOTOR AND CLUTCH ............................ 3B1-30
STEERING COLUMN ASSEMBLY .......... 3B1-31
SPECIAL TOOL ........................................... 3B1-31

GENERAL DESCRIPTION
SYSTEM COMPONENTS
This power steering (P/S) system consists of a P/S control module, a torque sensor, a motor and clutch installed
to the steering column.
In this system, the P/S control module determines the level and direction of the assist force for the steering
wheel according to the signals from the torque sensor and the vehicle speed, runs the motor so as to assist
operation of the steering wheel.
P/S control module diagnoses troubles which may occur in the area including the following components when
the ignition switch is ON and the engine is running. When P/S control module detects malfunction, it stops the
motor and clutch control.
Torque sensor
Vehicle speed sensor (VSS) circuit
Engine speed signal circuit
Motor
Clutch
P/S control module
NOTE:
The location of steering wheel/column and ECM to RH steering vehicle are opposite to those location
to LH steering vehicle.
1. Steering wheel 4. Torque sensor 7. Battery
2. Steering column assembly 5. Motor and clutch 8. VSS
3. P/S control module 6. Steering gear box 9. ECM

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-3
WIRING DIAGRAM
BLK RED
BLK
BLK
BLU
BLK YEL BLU
BLK
YEL
WHT
BRN
PPLBLK/WHT
BLK/RED
PPL/WHTBLK or RED
RED or BLK G24-1-1 G24-2-2
G24-2-1
G24-2-4
G24-2-3
G24-5
G24-3
G24-4
G24-2 G24-1-2
G24-1-3
G24-1-4
G24-1-5
G24-6
G24-8
G24-1 G24-7 12
5
6
124
378
9171611 10
G24-1
G24-3
G24-4
G24-5
G24-6
G24-7G24-8G24-2
13
G24-2-2
G24-2-4 G24-2-3 G24-2-1
14
G24-1-5
G24-1-4 G24-1-3 G24-1-2 G24-1-115
1. Main fuse 7. Monitor coupler (for A/T, ABS, P/S system) 13. Connector “G24”
2. Ignition switch 8. Diagnosis switch terminal (for P/S system) 14. Connector “G24-2”
3.“P/S” fuse (30A) in fuse box 9. Ground terminal 15. Connector “G24-1”
4.“IG METER” fuse (15A) in fuse box 10. P/S control module 16.“EPS” warning lamp
5. ECM 11. Motor and clutch 17. DLC
6. VSS 12. Torque sensor

3B1-4 ELECTRICAL POWER STEERING (P/S) SYSTEM
DIAGNOSIS
The P/S system in this vehicle is controlled by P/S control module. P/S control module has an on-board diagnos-
tic system which detects a malfunction in this system.
When diagnosing troubles, be sure to have full understanding of the outline of “ON-BOARD DIAGNOSTIC SYS-
TEM” and each item in “PRECAUTION IN DIAGNOSING TROUBLE” and execute diagnosis according to “SYS-
TEM CHECK FLOW TABLE”.
ON-BOARD DIAGNOSTIC SYSTEM
P/S control module performs on-board diagnosis (self-diagnosis)
on the system and operates “EPS” warning lamp (1) (malfunction
indicator lamp) as follows.
Malfunction indicator lamp (“EPS” warning lamp) lights when
the ignition switch is turned to ON position (but the engine at
stop) regardless of the condition of P/S control system. This
is only to check the malfunction indicator lamp (“EPS” warn-
ing lamp) bulb and its circuit.
If the areas monitored by P/S control module is free from any
trouble after the engine start (while engine is running), mal-
function indicator lamp (“EPS” warning lamp) turns OFF.
When P/S control module detects a trouble which has
occurred in the areas it monitors, malfunction indicator lamp
(“EPS” warning lamp) turns ON while the engine is running
to warn the driver of such occurrence of trouble and at the
same time it stores the exact trouble area in memory inside
of P/S control module.
PRECAUTIONS IN DIAGNOSING TROUBLES
Take a note of DTC indicated first.
Be sure to read “PRECAUTIONS FOR ELECTRONIC CIRCUIT SERVICE” in Section 0A before inspection
and observe what is written there.
When two or more troubles have occurred, their DTCs are indicated 3 times each starting with the smallest
code number and up.
DTC C1122 (DTC No.22) (engine speed signal failure) is indicated when ignition switch is ON position and
engine is not running but if indication changes to a normal one when engine is started, it means nothing
abnormal.
As DTC is stored in memory of P/S control module, be sure to clear memory after repair by performing the
procedure described in “DTC CLEARANCE”.
1

3B1-6 ELECTRICAL POWER STEERING (P/S) SYSTEM
For identify current DTC, clear history DTC referring to “DTC CLEARANCE” in this section. NOTE:
As execution of “DTC CLEARANCE” will clear all malfunction DTCs, be sure to record all DTCs
before servicing.
When 2 or more codes are indicated, the lowest numbered code will appear first.
If a code not listed on “DTC TABLE” is displayed, then the P/S control module is faulty.
DTC C1122 or DTC No.22 (flashing pattern : 22) is indicated when ignition switch is ON and engine
is not running but if DTC No.12 (flashing pattern : 12) is indicated when engine is started, it means
nothing abnormal.
Current DTC and history DTC can be identified by lighting and flashing of “EPS” warning lamp.
“EPS” warning lamp operates as follow depending on the trouble condition.
Current DTC is set.
(Abnormality exists at
present.)History DTC is set only.
(Faulty condition occurred
once in the past but normal
condition is restored at
present.)Current DTC and history
DTC exist.
“EPS” warning lamp after
engine startedRemains ON. Turn OFF. Remains ON.
“EPS” warning lamp when
shorting diagnosis switch ter-
minal and ground terminalDisplays current DTC. Displays history DTC.Displays current DTC and
history DTC.

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-7
CUSTOMER QUESTIONNAIRE (EXAMPLE)
MALFUNCTION INDICATOR LAMP
(“EPS” WARNING LAMP) CHECK
1) Turn ignition switch to ON position (but without running
engine), check that malfunction indicator lamp (“EPS” warn-
ing lamp) lights up. If lamp does not light up, go to “TABLE
A”. If lamp flashes, go to “TABLE B”.
2) Start engine and check that malfunction indictor lamp
(“CHECK ENGIE” light) turns OFF.
If lamp comes OFF, P/S system is in good condition.

3B1-8 ELECTRICAL POWER STEERING (P/S) SYSTEM
DTC CHECK
USING SUZUKI SCAN TOOL
1) Turn ignition switch to OFF position.
2) After setting cartridge connect SUZUKI scan tool to data link
connector (DLC) (1) located on underside of instrument
panel at driver’s seat side.
Special tool
(A) : 09931-76011
(B) : Master storage cartridge
(C) : 09931-76030
3) Turn ignition switch to ON position.
4) Read DTC according to instructions displayed on SUZUKI
scan tool and print it or write it down referring to SUZUKI
SCAN TOOL OPERATOR’S MANUAL for further details.
5) After completing the check, turn ignition switch to OFF posi-
tion and disconnect SUZUKI scan tool from DLC.
NOT USING SUZUKI SCAN TOOL
1) Remove glove box.
2) Apply chocks to wheels, set shift lever to neutral position and
pull parking brake fully.
3) Start engine.
4) Using jumper wire (4), short diagnosis switch terminal (1) to
ground terminal (2) of monitor coupler (3).
5) Read flashing of “EPS” warning lamp which represents DTC
and write it down. When more than 2 DTCs are stored in
memory, each DTC is repeated 3 times starting with the
smallest DTC number in increasing order.
For details and example of DTC, refer to “DTC TABLE”.
6) After completing the check, turn ignition switch to OFF posi-
tion and disconnect jumper wire (4) from monitor coupler. NOTE:
If Suzuki scan tool cannot display DTC, perform “SERIAL
DATA LINK CIRCUIT CHECK” described in this section.
(B)(A) (C)1
NOTE:
DTC No.22 is indicated when ignition switch is ON and
engine is not running but if DTC No.12 is indicated when
engine is started, it means nothing abnormal.
3
21
3
4

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-9
DTC CLEARANCE
USING SUZUKI SCAN TOOL
1) Turn ignition switch to OFF position.
2) After setting cartridge connect SUZUKI scan tool, connect
scan tool to data link connector (DLC) (1) located on under-
side of instrument panel at driver’s seat side.
Special tool
(A) : 09931-76011
(B) : Master storage cartridge
(C) : 09931-76030
3) Turn ignition switch to ON position.
4) Erase DTC according to instructions displayed on SUZUKI
scan tool referring to “SUZUKI SCAN TOOL OPERATOR’S
MANUAL” for further details.
5) After completing the check, turn ignition switch to OFF posi-
tion and disconnect SUZUKI scan tool from DLC.
NOT USING SUZUKI SCAN TOOL
1) Remove glove box.
2) Turn ignition switch to ON position.
3) Using jumper wire, short diagnosis switch terminal (1) to
ground terminal (2) of monitor coupler (3).
4) Make the disconnected end of jumper wire (4) contact where
disconnected (short) and repeat these actions (open and
short) at least 5 times within 10 seconds.
DTC clearance procedure specification
“a” : about 1 second
“b” : within 10 seconds
5) Perform “DTC CHECK” and confirm that normal DTC (DTC
No.12) is displayed and not malfunction DTC.
(B)(A) (C)1
21
3
3
4
“a”
“b”
Open
GroundCondition between diagnosis switch
terminal and ground terminal

3B1-10 ELECTRICAL POWER STEERING (P/S) SYSTEM
SERIAL DATA LINK CIRCUIT CHECK
DIAGNOSTIC FLOW TABLE
CAUTION:
Be sure to perform “SYSTEM CHECK FLOW TABLE” before starting diagnosis according to flow table.
1. Main fuse box 6. Combination meter 11. Data link connector (DLC)
2.“EPS” fuse (30 A) 7. Speedometer 12. To ECM, SDM and ABS hydraulic unit/control module
assembly (if equipped)
3. Ignition switch 8.“EPS” warning lamp 13. P/S control module
4. Circuit fuse box 9. To vehicle speed sensor (VSS) 14. Connector “G24”
5.“IG coil” fuse (15 A) 10. To main fuse box
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to Step 2. Go to “SYSTEM CHECK
FLOW TABLE” in this sec-
tion.
2 1) Make sure that SUZUKI scan tool free from
malfunction and correct cartridge for P/S
system is used.
2) Turn ignition switch to OFF position.
3) Check proper connection of SUZUKI scan
tool to DLC.
Is connection in good condition?Go to Step 3. Properly connect SUZUKI
scan tool to DLC.