2000 SUZUKI SWIFT sensor

AIR CONDITIONING (OPTIONAL) 1B-19
ECM Voltage Values Table for Relation of A/C Control
Terminal Wire Circuit Measurement
groundNormal value Condition
C41-1 PNK/BLK Compressor magnet
clutch outputGround to engine
(Fig B)12 – 15 V Except the above-mentioned condition with engine
running
0 – 1 V Blower fan switch and A/C switch ON with engine
running
C41-5 BLK/RED Main power supply for
ECMGround to engine
(Fig B)10 – 14 V Ignition switch ON with engine stopped
C41-6 BLK/RED Main power supply for
ECMGround to engine
(Fig B)10 – 14 V Ignition switch ON with engine stopped
C41-10 BRN/
WHTMain relay drive Ground to engine
(Fig B)0.5 – 1.2 V Ignition switch ON with engine stopped
10 – 14 V Ignition switch OFF
C41-16 YEL/GRN A/C switch input Ground to engine
(Fig B)12 – 15 V Blower fan switch or A/C switch OFF with engine
running
0 – 1 V Blower fan switch and A/C switch ON with engine
running
C41-18 BLU Radiator/condenser
cooling fan relay out-
put 1Ground to engine
(Fig B)0 – 1 V Blower fan switch and A/C switch ON
Engine coolant temperature at more than 97.5°C
(207.5°F) with engine running
12 – 15 V Blower fan motor switch or A/C switch OFF
Engine coolant temperature at less than 97.5°C
(207.5°F) with engine running
C42-1 BLK/ORN Main ground for ECM Ground to body
(Fig A)–0.5 – 1 V Engine running
C42-2 BLK ECM ground for
power circuitGround to body
(Fig A)–0.5 – 1 V Engine running
C42-3 BLK/ORN ECM ground for
power circuitGround to body
(Fig A)–0.5 – 1 V Engine running
C42-10 ORN Sensor ground for
ECT sensorGround to body
(Fig A)–0.5 – 1 V Engine running
C42-14 LT GRN/
BLKECT sensor input Ground to engine
(Fig B)0.71 – 0.75 V
(298 – 320 Ω
)Engine coolant temperature at approximately 80°C
(176°F) with engine running
0.35 – 0.37 V
(135 – 144 Ω
)Engine coolant temperature at Approximately
110°C (230°F) with engine running
If the temperature is more than 114°C (232°F),
compressor and condenser cooling fan should be
stop (come back at less than 112°C (230°F))
C42-18 PNK/GRN Medium pressure
switch inputGround to engine
(Fig B)–0.5 – 1 V Medium pressure switch of A/C refrigerant pres-
sure switch ON
12 – 15 V Medium pressure switch of A/C refrigerant pres-
sure switch OFF
G02-3 PPL/YEL Radiator/Condenser
cooling fan relay out-
put 2Ground to engine
(Fig B)0 – 1 V Blower fan motor switch ON, A/C switch ON and
medium pressure switch OFF
Engine coolant temperature at more than 102.5°C
(216.5°F) with engine running
12 – 15 V Blower fan motor switch OFF, A/C switch OFF or
medium pressure switch ON
Engine coolant temperature at less than 102.5°C
(216.5°F) with engine running
G02-10 ORN Sensor ground for A/C
evaporator tempera-
ture sensorGround to engine
(Fig A)–0.5 – 1 V Engine running
G02-13 PNK/BLU Blower fan speed
inputGround to engine
(Fig B)0 – 1 V Blower fan motor switch “ML”, “MH”, or “H” with
engine running
4 – 7 V Blower fan motor switch “L” position with engine
running
12 – 15 V Blower fan motor switch OFF with engine running
G02-14 WHT/BLK A/C evaporator tem-
perature sensor inputGround to engine
(Fig B)2.09 – 2.17 V
(1940 – 2060 Ω
)A/C evaporator temperature at approximately 25°C
(77°F) with engine running
3.52 – 3.59 V
(6450 – 6850 Ω
)A/C evaporator temperature at approximately 0°C
(32°F) with engine running
If the temperature is less than approximately 2.5°C
(36.5°F), compressor and condenser cooling fan
should be stop (come back at more than approxi-
mately 4°C (39.2°F)

1B-32 AIR CONDITIONING (OPTIONAL)
COOLING UNIT (EVAPORATOR)
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Recover refrigerant from A/C system by referring to
“RECOVERY” in this section.
3) Remove glove box.
1. A/C evaporator 6. Dash packing 11. O-ring
2. A/C evaporator temperature sensor 7. Packing 12. Door link
3. Expansion valve 8. Fresh air duct case 13. Lower packing
4. Evaporator case
: Apply sealant 99000-31160 to hatched part “A”.9. Clamp Do not reuse.
5. Cooling unit packing 10. Air inlet door
CAUTION:
Be careful not to damage A/C evaporator fins. If A/C
evaporator fin is bent, straighten it by using flat head
screwdriver or pair of pliers.
NOTE:
The amount of removed compressor oil must be mea-
sured for replenishing compressor oil.

AIR CONDITIONING (OPTIONAL) 1B-33
4) Remove fresh air control cable (1) and A/C evaporator tem-
perature sensor coupler.
5) Disconnect suction hose (1) and condenser outlet hose (2)
by removing attaching bolt (3).
6) Remove cooling unit mounting nuts (4) and screws (5).
7) Remove cooling unit (6).
INSPECTION
Check the following.
Clog of A/C evaporator fins.
If any clogs are found, A/C evaporator fins should be
washed with water, and should be dried with compressed
air.
A/C evaporator fins for leakage and breakage.
If any defects are found, repair or replace A/C evaporator.
A/C evaporator fittings for leakage.
If any defects are found, repair or replace A/C evaporator.
INSTALLATION
Reverse removal procedure to install cooling unit noting the fol-
lowing instructions.
If A/C evaporator temperature sensor removed, its should be
reinstalled in original position.
Replenish specified amount of compressor oil to compressor
suction side by referring to “REPLENISHING COMPRES-
SOR OIL” in this section.
Install uniformly the packing (1) to installation hole.
Evacuate and charge refrigerant by referring to “EVACUAT-
ING” and “CHARGING” in this section.
Adjust fresh air control cable, refer to “HEATER LEVER
ASSEMBLY” in Section 1A.

1B-34 AIR CONDITIONING (OPTIONAL)
A/C EVAPORATOR TEMPERATURE SENSOR
Check resistance between terminals for A/C evaporator tempera-
ture sensor (1).
If check results are as not specified, replace A/C evaporator tem-
perature sensor.
A/C evaporator temperature sensor resistance
EXPANSION VALVE
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Recover refrigerant from A/C system by referring to
“RECOVERY” in this section.
3) Remove attaching bolt (1).
4) Remove suction hose (2) and receiver/dryer outlet pipe (3)
from expansion valve (4).
5) Remove expansion valve (4).
INSTALLATION
Reverse removal procedure to install expansion valve noting the
following instructions.
Replenish specified amount of compressor oil to compressor
suction side by referring to “REPLENISHING COMPRES-
SOR OIL” in this section.
Evacuate and charge refrigerant by referring to “EVACUAT-
ING” and “CHARGING” in this section.
INSPECTION
Refer to “PERFORMANCE DIAGNOSIS” in this section. Sensor Temperature Resistance
0°C (32°F) 6.4 – 6.9 k
Ω
ΩΩ Ω
25°C (77°F) 1.8 – 2.2 k
Ω
ΩΩ Ω
NOTE:
When A/C evaporator temperature sensor removed, its
should be reinstalled in original position.
NOTE:
The amount of removed compressor oil must be mea-
sured for replenishing compressor oil.

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-1
6F1
6F2
6G
6H
6K
7A
7A1
3B1
7D
7E
7F
8A
8B
8C
8D
8E
9
10
10A
10B
SECTION 3B1
ELECTRICAL POWER STEERING (P/S) SYSTEM
CONTENTS
GENERAL DESCRIPTION .............................3B1-2
SYSTEM COMPONENTS ........................... 3B1-2
WIRING DIAGRAM ..................................... 3B1-3
DIAGNOSIS ....................................................3B1-4
ON-BOARD DIAGNOSTIC SYSTEM .......... 3B1-4
PRECAUTIONS IN DIAGNOSING
TROUBLES ................................................. 3B1-4
SYSTEM CHECK FLOW TABLE ................ 3B1-5
MALFUNCTION INDICATOR LAMP
(“EPS” WARNING LAMP) CHECK.............. 3B1-7
DTC CHECK ............................................... 3B1-8
DTC CLEARANCE ...................................... 3B1-9
SERIAL DATA LINK CIRCUIT CHECK ..... 3B1-10
DTC TABLE .............................................. 3B1-11
TABLE A - MALFUNCTION INDICATOR
LAMP DOES NOT COME ON AT
IGNITION SWITCH ON BUT LEAVING
ENGINE OFF ............................................ 3B1-13
TABLE B - MALFUNCTION INDICATOR
LAMP FLASHES AT IGNITION SWITCH
ON ............................................................. 3B1-15
TABLE C - MALFUNCTION INDICATOR
LAMP DOES NOT FLASH, JUST
REMAINS ON OR JUST REMAINS OFF
EVEN WITH DIAGNOSIS SWITCH
TERMINAL GROUNDED .......................... 3B1-15
DTC C1111 (DTC No.11) TORQUE
SENSOR MAIN CIRCUIT FAILURE ......... 3B1-16
DTC C1113 (DTC No.13) TORQUE
SENSOR MAIN AND SUB CIRCUIT
FAILURE ................................................... 3B1-16DTC C1115 (DTC No.15) TORQUE
SENSOR SUB CIRCUIT FAILURE........... 3B1-16
DTC C1114 (DTC No.14) TORQUE
SENSOR 5V POWER SUPPLY CIRCUIT
FAILURE ................................................... 3B1-17
DTC C1116 (DTC No.16) TORQUE
SENSOR 8V POWER SUPPLY CIRCUIT
FAILURE ................................................... 3B1-18
DTC C1121/C1123/C1124
(DTC No.21/23/24) VSS CIRCUIT
FAILURE ................................................... 3B1-19
DTC C1122 (DTC No.22) ENGINE
SPEED SIGNAL CIRCUIT FAILURE ........ 3B1-20
DTC C1141/C1142/C1143/C1144/C1145
(DTC No.41/42/43/44/45) MOTOR
CIRCUIT FAILURE ................................... 3B1-21
DTC C1151 (DTC No.51) CLUTCH
CIRCUIT FAILURE ................................... 3B1-22
DTC C1153(DTC No.53) P/S CONTROL
MODULE POWER SUPPLY CIRCUIT
FAILURE ................................................... 3B1-24
DTC C1152/C1154/C1155
(DTC No.52/54/55) P/S CONTROL
MODULE FAILURE .................................. 3B1-24
TROUBLE DIAGNOSIS (FOR TROUBLE
NOT INDICATED BY ON BOARD
DIAGNOSTIC SYSTEM)........................... 3B1-25
INSPECTION OF P/S CONTROL
MODULE AND ITS CIRCUITS ................. 3B1-26
STEERING WHEEL PLAY
INSPECTION ............................................ 3B1-28 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” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” 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.
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).

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

3B1-10 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.