2006 SUZUKI SWIFT ig 2 sig

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DTC C1113: Steering Torque Sensor (Main and Sub) Circuit CorrelationS7RS0B6304012
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
M
5V
BLK
RED
WHT BLU
GRN
BRN YEL
E51-1
E51-2
E52-18
E53-5
E53-7
E52-6
E52-8
E53-2
E52-9
E52-16
E52-19
GRY
[A ]
12 3
4 5 67
89
11
10
12 13
141516
17 18 19 20
5
67
12V
5V
5V
12V
REDE52-20E53-6
E53-4
E53-1
109
1
2
[B ]
[C ]
7654321
LT GRN
/BLKE52-1 E49-1
GRNGRNWHTBLK
WHY
8
3
4
4
4
4
1 2
E49-2BLK
I7RS0B630005-01
[A]: Connector “E52” (viewed from harness side)
3. Junction block assembly 8. Individual circuit fuse box No.1
[B]: Connector “E49” (viewed from harness side )4. Fuse 9. Torque sensor signal (sub) circuit
[C]: Connector “E53” (viewed from harness side) 5. P/S control module 10. Torque sensor signal (main) circuit
1. Main fuse box 6. Torque sensor
2. Ignition switch 7. Torque sensor amplifier
DTC detecting condition Trouble area
Voltage difference between torque sensor main signal and
sub signal is more than 0.6 V for 1 second continuously
(1 driving cycle detection logic) • Torque sensor signal circuit
• Torque sensor
• P/S control module
Step
Action YesNo
1 Was “EPS System Check” performed? Go to Step 2.Go to “EPS System
Check”.
2 DTC check
Is DTC C1114 and/or DTC C1119 indicated together? Go to applicable diag.
flow.
Go to Step 3.
3 Torque sensor signal (sub) circuit check
1) Check for P/S control module connector (“E52”) for
proper connection.
2) With ignition switch turned OFF, disconnect torque sensor connector.
3) Check for voltage between “E53-7” (“BLU” wire) terminal and body ground with ignition switch ON.
Is it about 5 V? Go to Step 4.
Go to Step 7.

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4Torque sensor signal (main) voltage check
1) Check for voltage between “E53-5” (“WHT” wire)
terminal and body ground with ignition switch ON.
Is it about 0 V? Go to Step 5. Torque sensor signal
circuit is shorted to
other circuit.
5 Torque sensor signal (main) resistance check
1) Check for resistance “E53-5” (“WHT” wire) terminal and
body ground terminal with ignition switch OFF.
Is it about 1 M
Ω? Go to Step 6. Go to Step 8.
6 Torque sensor output voltage check
1) Connect connector to torque sensor with ignition switch
turned OFF.
2) Check torque sensor out put voltage referring to “Torque Sensor and Its Circuit Inspection”.
Is torque sensor in good condition? Substitute a known-
good P/S control
module and recheck.
Replace steering gear
case.
7 Torque sensor (sub) circuit wire check
1) Disconnect P/S control module.
2) Check that torque sensor signal (sub) circuit is as
follows.
• Insulation resistance of wire harness is infinity between “Torque sensor signal (sub) circuit” terminal
and other terminal at torque sensor connector.
• Wiring harness resistance of “Torque sensor signal (sub) circuit” is less than 1 Ω.
• Insulation resistance between “Torque sensor (sub) signal circuit” and vehicle body ground is infinity.
• Circuit voltage between “Torque sensor signal (sub) circuit” circuit and ground circuit is 0 – 1 V with ignition
switch turned ON.
Is circuit in good condition? Replace P/S control
module.
Repair or replace
defective circuit.
8 Torque sensor (main) circuit wire check
1) Disconnect P/S control module.
2) Check that torque sensor (main) signal circuit is as
follows.
• Insulation resistance of wire harness is infinity between “Torque sensor (main) signal circuit” terminal
and other terminal at torque sensor connector.
• Wiring harness resistance of “Torque sensor (main) signal circuit” is less than 1 Ω.
• Insulation resistance between “Torque sensor (main) signal circuit” and vehicle body ground is infinity.
Is circuit in good condition? Replace P/S control
module.
Repair or replace
defective circuit.
Step Action Yes No

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DTC C1117: Steering Torque Sensor Failure Signal Circuit LowS7RS0B6304014
Wiring Diagram
DTC Detecting Condition and Trouble Area
M
5V
BLK
RED
WHT BLU
GRN
BRN YEL
E51-1
E51-2
E52-18
E53-5
E53-7
E52-6
E52-8
E53-2
E52-9
E52-16
E52-19
GRY
[A ]
12 3
4 5 67
89
11
10
12 13
141516
17 18 19 20
5
67
12V
5V
5V
12V
REDE52-20E53-6
E53-4
E53-1
9
12
[B]
[C ]
7654321
LT GRN
/BLKE52-1 E49-1
GRNGRNWHTBLK
WHY
8
3
4
4
4
4
1 2
E49-2BLK
I7RS0B630007-01
[A]: Connector “E52” (viewed from harness side)
2. Ignition switch6. Torque sensor
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly7. Torque sensor amplifier
[C]: Connector “E53” (viewed from harness side) 4. Fuse8. Individual circuit fuse box No.1
1. Main fuse box 5. P/S control module9. Torque sensor internal failure signal circuit
DTC detecting condition Trouble area
Torque sensor internal failure signal circuit voltage is less
than 1.7 V when ignition switch turned ON
(1 driving cycle detection logic) • Torque sensor internal failure signal circuit
• Torque sensor
• P/S control module

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DTC Troubleshooting
DTC C1118: Steering Torque Sensor Failure Signal Circuit HighS7RS0B6304015
Wiring Diagram
Refer to “DTC C1117: Steering Torque Sensor Failure Signal Circuit Low”.
DTC Detecting Condition and Trouble AreaStep Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check”.
2 DTC check
Is DTC C1113, C1114 and/or DTC C1119 indicated together? Go to applicable diag.
flow.
Go to Step 3.
3 Torque sensor internal failure signal circuit check
1) Check for P/S control module connector (“E52”) for
proper connection.
2) With ignition switch turned OFF, disconnect torque sensor connector.
3) Check for voltage between “E53-1” (“YEL” wire) terminal and body ground with ignition switch ON.
Is it about 5 V? Go to Step 4. Go to Step 5.
4 Torque sensor internal failure signal circuit check
1) With ignition switch turned OFF, connect torque sensor
connector.
2) Check that voltage between “E52-16” (“YEL” wire) terminal and body ground is about 5V at the moment of
ignition switch turned ON.
Is it about 5 V? Substitute a known-
good P/S control
module and recheck.
Replace steering gear
case.
5 Torque sensor internal failure signal circuit wire check
1) Disconnect P/S control module.
2) Check that torque sensor failure signal circuit is as
follows.
• Insulation resistance of wire harness is infinity between “Torque sensor internal failure signal circuit”
terminal and other terminal at torque sensor
connector.
• Insulation resistance between “Torque sensor internal failure signal circuit” and vehicle body ground is
infinity.
Is circuit in good condition? Substitute a known-
good P/S control
module and recheck.
Repair or replace
defective circuit.
DTC detecting condition
Trouble area
Torque sensor internal failure signal circuit voltage is more
than 3.7 V for 1 second continuously
(1 driving cycle detection logic) • Torque sensor signal circuit
• Torque sensor internal failure signal circuit
• Torque sensor
• P/S control module

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DTC TroubleshootingStep Action Yes No 1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check”.
2 DTC check
Is DTC C1113, C1114 and/or DTC C1119 indicated together? Go to applicable diag.
flow.
Go to Step 3.
3 Torque sensor internal failure signal voltage check
1) Check for P/S control module connector (“E52”) for
proper connection.
2) Check for voltage between “E52-16” (“YEL” wire) terminal and body ground with ignition switch ON.
Is voltage 0 – 1 V? Substitute a known-
good P/S control
module and recheck.
Go to Step 4.
4 Torque sensor internal failure signal circuit check
1) With ignition switch turned OFF, disconnect torque
sensor connector.
2) Check for voltage between “E53-1” (“YEL” wire) terminal and body ground with ignition switch ON.
Is it about 5 V? Go to Step 5. Go to Step 6.
5 Torque sensor internal failure signal circuit check
1) Disconnect P/S control module connector.
2) Check that torque sensor failure signal circuit is as
follows.
• Insulation resistance of wire harness is infinity between “Torque sensor internal failure signal circuit”
terminal and other terminal at torque sensor
connector.
Is circuit in good condition? Go to Step 7. Repair or replace
defective circuit.
6 Torque sensor internal failure signal circuit check
1) Disconnect P/S control module connector.
2) Check that torque sensor failure signal circuit is as
follows.
• Insulation resistance of wire harness is infinity between “Torque sensor internal failure signal circuit”
terminal and other terminal at torque sensor
connector.
• Wiring harness resistance of “Torque sensor internal failure signal circuit” is less than 1 Ω.
Is circuit in good condition? Substitute a known-
good P/S control
module and recheck.
Repair or replace
defective circuit.
7 Torque sensor signal circuit check
1) Check for torque sensor signal circuit referring to Step 3)
– 8) of “DTC C1113: Steering Torque Sensor (Main and
Sub) Circuit Correlation”.
Is torque sensor and its circuit in good condition? Replace steering gear
case.
Repair or replace
defective parts.

Downloaded from www.Manualslib.com manuals search engine 6C-26 Power Assisted Steering System:
DTC C1121 / C1123 / C1124: VSS Circuit FailureS7RS0B6304017
DTC C1121: No Vehicle Speed Signal (60 Seconds or More)
DTC C1123: No Vehicle Speed Signal (30 Seconds or More)
DTC C1124: Vehicle Speed Performance (Impossible Deceleration)
Wiring Diagram
DTC Detecting Condition and Trouble Area
M
BRNRED/
BLU
BLK
RED
E52-14
E52-12
E23-4
E23-26
E23-25 E51-1
E51-2
[A ]
12
3
4 5 67
89
11
10
12 13
141516
17 18 19 20
5V
PPL
E52-4
8
5
12V
E49-2BLK
12V
12V
6REDRED/ BLKWHT
7WHTWHT/BLKWHTBLK BLK
111
2
[B ]
9
LT GRN
/BLKE52-1 E49-1
GRNGRNWHTBLK
WHY
10
3
4
4
4
4
1 2
12
I7RS0B630009-01
[A]: Connector “E52” (viewed from harness side)
4. Fuse9. ABS/ESP® control module
[B]: Connector “E49” (viewed from harness si de)5. ECM 10. Individual circuit fuse box No.1
1. Main fuse box 6. Left-front wheel speed sensor11. Vehicle speed signal circuit
2. Ignition switch 7. Right-front wheel speed sensor 12. Engine speed signal circuit
3. Junction block assembly 8. P/S control module
DTC detecting condition Trouble area
DTC C1121:
Vehicle speed signal is 0 km/h even though engine speed
is more than 4000 rpm for more than 60 seconds
continuously (before elapse of 5 min from engine start) or
vehicle speed signal is 0 km/h even though engine speed
is more than 2500 rpm for more than 60 seconds
continuously (after elapse of 5 min for engine start).
(1 driving cycle detection logic but MIL does not light up)
DTC C1123:
Vehicle speed signal is 0 km/h with continuously more
than 3 driving cycles even though engine speed is more
than 4000 rpm for more than 30 seconds continuously
(before elapse of 5 min from engine start) or vehicle speed
signal is 0 km/h with continuously more than 3 driving
cycles even though engine speed is more than 2500 rpm
for more than 30 seconds continuously (after elapse of 5
min for engine start).
(3 driving cycle detection logic)
DTC C1124:
Vehicle speed signal is less than 5 km/h for more than 5
seconds continuously with more than specified
deceleration speed (–20 m/s
2) from over 20 km/h.
(1 driving cycle detection logic but MIL does not light up) • Vehicle speed signal circuit
• Wheel speed sensor
•ECM
• P/S control module
• ABS/ESP®
control module
• CAN communication circuit

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DTC TroubleshootingStep Action Yes No 1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check”.
2 DTC check
DTC Check for ECM referring to “DTC Check in Section 1A”.
Is there any DTC detected? Go to applicable DTC
diag. flow.
Go to Step 3.
3 DTC check
1) Check ABS control module for DTC referring to “DTC
Check in Section 4E”.
Is there any DTC detected? Go to applicable DTC
diag. flow.
Go to Step 4.
4 Vehicle speed signal circuit check
1) With ignition switch turned OFF, disconnect connectors
from ECM.
2) Check ECM connector for proper connection.
3) If OK, turn ON ignition switch, measure voltage between “E23-25” wire terminal of ECM connector and body
ground.
Is voltage 4 – 5 V? Go to Step 6.
Go to Step 5.
5 Vehicle speed signal circuit check
1) With ignition switch turned OFF, disconnect P/S control
module connector “E52”.
2) Check for proper terminal connection to P/S control module connector and ECM connector.
3) If connections are OK, chec k that “Vehicle speed signal
circuit” is as following.
• Insulation resistance of “Vehicle speed signal circuit” wire harness is infinity between its terminal and other
terminals at ECM and P/S control module connector.
• Wiring resistance of “Vehicle speed signal circuit” is less than 1 Ω.
• Insulation resistance of “Vehicle speed signal circuit” between its circuit and vehicle body ground is infinity.
• Circuit voltage between “Vehicle speed signal” circuit and ground circuit is 0 – 1 V with ignition switch turned
ON.
Is circuit in good condition? Replace P/S control
module.
Repair or replace
defective circuit.
6 ECM voltage check
1) Connect P/S control mo dule and ECM connectors.
2) Check ECM for vehicle speed signal output referring to “Inspection of ECM and Its Circuits in Section 1A”.
Is check result in good condition? Replace P/S control
module.
Replace ECM.

Downloaded from www.Manualslib.com manuals search engine 6C-28 Power Assisted Steering System:
DTC C1122: Engine Speed SignalS7RS0B6304018
NOTE
DTC C1122 (engine speed signal failure) is indicated when ignition switch is at ON position and engine
is not running, but means there is nothing abnormal if indication changes to a normal one when
engine is started.

Wiring Diagram
Refer to “DTC C1121 / C1123 / C1124: VSS Circuit Failure”.
DTC Detecting Condition and Trouble Area DTC detecting condition Trouble area
Engine speed signal is less than 220 rpm for more than
0.8 seconds.
or
Engine speed signal is less than 220 rpm for more than 20
seconds continuously even though vehicle speed signal is
more than 50 km/h.
(1 driving cycle detection logic) • Engine speed signal circuit
•ECM
• P/S control module
• Vehicle speed signal circuit