2000 SUZUKI SWIFT G24-2

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-21
DTC C1141/C1142/C1143/C1144/C1145 (DTC No.41/42/43/44/45) MOTOR CIR-
CUIT FAILURE
Fig. for Step 2
1. To main fuse 4.“IG METER” fuse (15A) in fuse box 7. Connector “G24”
2. Ignition switch 5. P/S control module 8. Connector “G24-1”
3.“P/S” fuse (30A) in fuse box 6. Motor and clutch
MG24-1
G24-8G24-2
7
G24-2-2
G24-2-4 G24-2-3 G24-2-1
8
G24-2 G24-1
G24-8G24-2-2
G24-2-1
G24-2-4
G24-2-3 1
23
46 5
BLK/WHTBLK/RED
BLKBLK BLK RED or BLK BLK or RED
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column hole cover.
2) Check proper connection for 4-terminals con-
nector (“G24-2”) to P/S control module.
3) If OK, start engine.
4) Check voltage between “G24-2-2” (“BLK” wire
or “RED wire) terminal and body ground and
“G24-2-1” (“RED” wire or “BLK” wire) terminal
and body ground with connector (“G24-2”)
connected to P/S control module.
Are they 5 – 7 V with steering wheel held at posi-
tion for vehicle to run straight?Go to STEP 3. Repair poor connection,
high resistance, open or
short to power circuit or
ground in “G24-2” (“BLK”
wire or “RED” wire) or
“G24-2-1” (“RED” wire or
“BLK” wire) circuit.
3 1) Check motor and its circuit. Refer to “MOTOR
AND CLUTCH”.
Is motor and clutch in good condition?Substitute a known-
good P/S control module
and recheck.Replace steering column
assembly and recheck.

3B1-22 ELECTRICAL POWER STEERING (P/S) SYSTEM
DTC C1151 (DTC No.51) CLUTCH CIRCUIT FAILURE
1. To main fuse 4.“IG METER” fuse (15A) in fuse box 7. Connector “G24”
2. Ignition switch 5. P/S control module 8. Connector “G24-2”
3.“P/S” fuse (30A) in fuse box 6. Motor and clutch
M
G24-2 G24-1
G24-8G24-2-2
G24-2-1
G24-2-4
G24-2-3 1
23
46 5
BLK/WHTBLK/RED
BLKBLK BLK RED or BLKBLK or RED
G24-1
G24-8G24-2
7
G24-2-2
G24-2-4 G24-2-3 G24-2-1
8
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column lower cover.
2) Check proper connection for 4-terminals
connector (“G24-2”) to P/S control module.
3) If OK, start engine.
4) Check voltage between “G24-2-4” (“BLK”
wire) terminal and body ground with con-
nector (“G24-2”) connected to P/S control
module.
Is it 0 V?Go to STEP 3. Repair poor connection,
high resistance, open or
short to power circuit or
ground in “G24-2-4”
(“BLK” wire) circuit.
3 1) Check voltage between “G24-2-3” (“BLK”
wire) terminal and body ground with con-
nector (“G24-2”) connected to P/S control
module.
Is it 10 – 14 V with steering wheel held at posi-
tion for vehicle to run straight?Go to STEP 4. Repair poor connection,
high resistance, open or
short to power circuit or
ground in “G24-2-3”
(“BLK” wire) circuit.
4 1) Check motor and its circuit. Refer to
“MOTOR AND CLUTCH”.
Is motor and clutch in good condition?Substitute a known-good
P/S control module and
recheck.Replace steering column
assembly and recheck.

3B1-24 ELECTRICAL POWER STEERING (P/S) SYSTEM
DTC C1153(DTC No.53) P/S CONTROL MODULE POWER SUPPLY CIRCUIT
FAILURE
Fig. for Step 2
DTC C1152/C1154/C1155 (DTC No.52/54/55) P/S CONTROL MODULE FAILURE
Substitute a known-good P/S control module and recheck.
1. To main fuse 3.“P/S” fuse (30A) in fuse box 5. P/S control module
2. Ignition switch 4.“IG METER” fuse (15A) in fuse box 6. Connector “G24”
G24-2 G24-1
G24-8 13
45
BLK/WHT BLK/RED
BLK
G24-1
G24-8G24-2
6
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column lower cover.
2) Check “P/S” fuse and proper connection to
P/S control module at “G24-1” (“BLK/WHT”
wire) terminal.
3) If OK, check voltage between “G24-1” termi-
nal and body ground with connector (“G24”)
connected to P/S control module.
Is it 10 – 14 V?Check intermittent trou-
ble. Refer to “INTERMIT-
TENT TROUBLE” in
SECTION 0A.
If OK, substitute a known-
good P/S control module
and recheck.Repair poor connection or
high resistance in “G24-1”
(“BLK/RED” wire) circuit.

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-27
TERMINAL
NO.CIRCUIT NORMAL VOLTAGE CONDITION
G24-2 Ground––
G24-1 P/S control module
power supply from battery10 – 14V–
G24-8 P/S control module
power supply from igni-
tion switch10 – 14V Ignition switch ON
G24-7 VSS✱ Indicator
deflection repeated
0 – 1V and 9 – 11VIgnition switch ON
Front left tire turned quickly with right
tire locked
G24-6 Engine speed signal✱ Indicator
deflection repeated
0 – 1V and 10 – 14VEngine idling
G24-5“EPS” light 0V“EPS” warning lamp ON
G24-4 Diagnosis switch terminal 0 – 14V Ignition switch ON
G24-3 Data link connector––
G24-2-2 Motor output 2 5 – 7V Engine idling and steering wheel
held at position for vehicle to run
straight
G24-2-1 Motor output 1 5 – 7V Engine idling and steering wheel
held at position for vehicle to run
straight
G24-2-4 Clutch output 2 0V–
G24-2-3 Clutch output 1 10 – 14V Engine idling
G24-1-5 Torque sensor (Main) About 2.5V Ignition switch ON and steering
wheel held at position for vehicle to
run straight
Check voltage between “G24-1-5”
and “G24-1-3” terminals
G24-1-4 Torque sensor (Sub) About 2.5V Ignition switch ON and steering
wheel held at position for vehicle to
run straight
Check voltage between “G24-1-4”
and “G24-1-3” terminals
G24-1-3 Torque sensor (GND) 0V–
G24-1-2 5V power supply
for torque sensorAbout 5V Ignition switch ON
Check voltage between “G24-1-2”
and “G24-1-3” terminals
G24-1-1 8V power supply
for torque sensorAbout 8V Ignition switch ON
Check voltage between “G24-1-1”
and “G24-1-3” terminals
NOTE:
✱
✱✱ ✱ : The voltage of this circuit may fail to check by voltmeter.
If so, use oscilloscope.

3B1-30 ELECTRICAL POWER STEERING (P/S) SYSTEM
MOTOR AND CLUTCH
ON-VEHICLE INSPECTION
1) Remove steering column hole cover.
2) Disconnect motor and clutch connector (1) from P/S control
module with ignition switch OFF.
3) Check resistance between terminals of motor and clutch
connector (1)
If check result is not as specified above, replace steering col-
umn assembly.
Motor and clutch circuit resistance
4) Check continuity between terminal of motor and clutch con-
nector (1) and body ground.
If check result is not as specified above, replace steering col-
umn assembly.
Motor and clutch circuit resistance (to body ground)
5) Connect battery (1) between “G24-2-2” and “G24-2-1”.
Check that motor rotates smoothly, then measure current
between “G24-2-1” and “G24-2-2” using ammeter (2) as
shown in figure.
If check result is not satisfactory, replace steering column
assembly.
Motor and clutch circuit current (reference value)
Standard : About 0.65 A
6) Connect battery (1) between “G24-2-4” and “G24-2-3”, then
check that clutch operation sound is heard.
If check result is not satisfactory, replace steering column
assembly. “G24-2-2” and “G24-2-1”
(For motor)About 1
Ω
ΩΩ Ω
“G24-2-4” and “G24-2-3”
(For clutch)About 12
Ω
ΩΩ Ω
(at 20°C (68°F))
“G24-2-4” and body ground No continuity
“G24-2-2” and body ground No continuity