2005 SUZUKI SWIFT Inspection

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DTC Troubleshooting
DTC 1020: Master Cylinder Pressure Sensor Power Supply FailureS7RS0B4604028
DTC Detecting Condition and Trouble Area
DTC Troubleshooting1) Turn ignition switch to OFF position.
2) Check for proper connection from harness to ESP ® control module.
3) If OK, substitute an ESP ® hydraulic unit / control module assembly with correct part number.
4) Recheck system.
Step Action Yes No
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2. Go to “Electronic
Stability Program
System Check”.
2 Check brake fluid level
1) Check brake fluid level in reservoir.
Is brake fluid level upper than the minimum level? Go to Step 3. Replenish brake fluid to
reservoir.
3 DTC check for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP ®.
Is DTC U1073 and/or U1140 detected? Go to applicable diag.
flow.
Go to Step 3.
4 Check brake fluid level switch
1) Turn ignition switch to OFF position.
2) Disconnect brake fluid level switch connector.
3) Check for proper connection at each terminal of brake
fluid level switch connector.
4) If OK, then check brake fluid level switch referring to “Brake Fluid Level Switch Inspection in Section 9C”.
Is check result OK? Go to Step 5. Replace brake fluid
level switch.
5 Check brake fluid level switch circuit
1) Disconnect BCM connector.
2) Check for proper connection to BCM connector at “E46-
5” terminal.
3) If OK, then check resistance between “E46-5” terminal and vehicle body ground.
Is resistance infinity? Go to Step 6. “BLKL/RED” wire circuit
is shorted to ground.
6 Check BCM
1) Connect brake fluid level switch connector and BCM
connector.
2) Check voltage at “E46-5” terminal of BCM referring to “Inspection of BCM and its Circuits in Section 10B”.
Is voltage in good condition? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Check BCM power and
ground circuit. If circuit
is OK, substitute a
known-good BCM and
recheck.
DTC Detecting Condition
Trouble Area
Power supply voltage to master cylinder pressure sensor
in ESP® hydraulic unit / control mo dule assembly is out of
specification. • ESP
® control module

Downloaded from www.Manualslib.com manuals search engine 4F-34 Electronic Stability Program:
DTC C1024: Steering Angle Sensor Circuit FailureS7RS0B4604029
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1027: ESP® OFF Switch Circuit FailureS7RS0B4604030
Wiring Diagram 6
Check wheel speed sensor
1) Refer to “Front / Rear Wheel Speed Sensor On-Vehicle
Inspection”, check output voltage or waveform.
Is specified voltage and/or waveform obtained? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Replace wheel speed
sensor and recheck.
Step
Action YesNo
DTC Detecting Condition Trouble Area
• Steering angle sensor internal defect is detected by CPU in steering angle sensor.
• Steering angle sensor signal is out of specified range. • Steering angle sensor
• ESP
® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 DTC check for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP ®.
Are DTC U1073 and/or U1126 detected? Go to applicable DTC
diag. flow.
Go to Step 3.
3 Check sensor calibration
1) Calibrate steering angle sensor referring to “Sensor
Calibration”.
2) Clear all DTC(s) and check DTC for ESP ®.
Is DTC C1024 still detected? Go to Step 4.
Steering angle sensor
calibration was
incompleted.
4 Check steering angle sensor
1) Check steering angle sensor referring to “Steering Angle
Sensor On-Vehicle Inspection”.
Is it good condition? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Replace steering angle
sensor.
[A]
E85
161
15
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
3233
34
35
36
37
38
39
40
41
42
43
44
45
46
47
LT GRN/REDBLK/ORN
12V
E85-7
1 2
I6RS0B460018-01
[A]: ESP
® control module connector (viewed from terminal side) 1. ESP ® OFF Switch 2. ESP ® hydraulic unit control module assembly

Downloaded from www.Manualslib.com manuals search engine Electronic Stability Program: 4F-35
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1028: Master Cylinder Pressure Sensor Circuit FailureS7RS0B4604031
DTC Detecting Condition and Trouble Area
DTC TroubleshootingDTC Detecting Condition Trouble Area
Mechanical switch failure, fa ilure in switch wiring is
shorted to ground. • ESP
® OFF switch
• ESP ® OFF switch circuit
• ESP ® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 Check ESP ® OFF switch condition
Is ESP
® OFF switch is OFF condition? Go to Step 3. ESP
® OFF switch
turned OFF condition
and recheck.
3 Check ESP ® OFF switch
1) Turn ignition switch to OFF position.
2) Remove ESP® OFF switch referring to “ESP ® OFF
Switch Removal and Installation”.
3) Check for proper connection at each terminal of ESP ®
OFF switch.
4) If OK, then check ESP ® OFF switch referring to “ESP ®
OFF Switch Inspection”.
Is it good condition? Go to Step 4. Replace ESP
® OFF
switch.
4 Check ESP ® OFF switch circuit
1) Disconnect ESP ® control module connector.
2) Check for proper connection to ESP ® control module
connector at “E85-7” terminal.
3) If OK, then check resistance between “E85-7” terminal and vehicle body ground.
Is resistance infinity? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. “LT GRN/RED” wire
circuit is shorted to
ground.
DTC Detecting Condition
Trouble Area
Input signal voltage from master cylinder pressure sensor
in ESP ® control module is too high or low. • Leakage or air in the hydraulic brake system
• Clearance between brake pad and disc too high
Step
Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 Check brake system
1) Check brake system as follows.
• Leakage or air in the hydraulic brake system
• Clearance between brake pad and disc too high
Are they in good condition? Go to Step 3.
Repair, replace or
adjust.
3 Check sensor calibration
1) Calibrate master cylinder pressure sensor referring to
“Sensor Calibration”.
2) Clear all DTC(s) and recheck DTC.
Is DTC C1028 still detected? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly recheck. Master cylinder
pressure sensor
calibration was
incompleted.

Downloaded from www.Manualslib.com manuals search engine 4F-38 Electronic Stability Program:
DTC Troubleshooting
DTC C1038: Steering Angle Sensor Detect Rolling Counter Failure from ESP® Control ModuleS7RS0B4604034
DTC Detecting Condition and Trouble AreaStep Action Yes No
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2 Go to “Electronic
Stability Program
System Check”.
2 Check fuse
1) Check circuit fuses for steering angle sensor and its
circuit.
Is it good condition? Go to Step 3. Replace fuse and check
for short circuit to
ground.
3 Check steering angle sensor power supply circuit
1) Turn ignition switch to OFF position.
2) Disconnect steering angle sensor connector.
3) Check for proper connection to steering angle sensor
connector terminals at “G50-1”, “G50-2” and “G50-3”.
4) If OK, then measure voltage between connector terminal “G50-3” and vehicle body ground.
Is it 10 – 14 V? Go to Step 4. “WHT/RED” wire circuit
open.
4 Check steering angle sensor power supply circuit
1) Measure voltage between connector terminal “G50-1”
and vehicle body ground with ignition switch turned ON.
Is it 10 – 14 V? Go to Step 5. “GRN/ORN” wire circuit
open.
5 Check steering angle sensor ground circuit
1) Turn ignition switch to OFF position.
2) Measure resistance between connector terminal “G50-2”
and vehicle body ground.
Is resistance less than 2
Ω? Go to Step 6. “BLK/ORN” wire circuit
open or high resistance.
6 Check steering angle sensor
1) Connect steering angle sensor connector.
2) Check steering angle sensor referring to “Steering Angle
Sensor On-Vehicle Inspection”.
Is it good condition? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Substitute a known-
good steering angle
sensor and recheck.
DTC Detecting Condition
Trouble Area
ESP ® control module rolling counte r failure is detected by
steering angle sensor. • CAN communication circuit
• Steering angle sensor
• ESP
® control module

Downloaded from www.Manualslib.com manuals search engine Electronic Stability Program: 4F-39
DTC Troubleshooting
DTC C1039: Yaw Rate / G Sensor Assembly Internal FailureS7RS0B4604035
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1040: Stability Control System Function FailureS7RS0B4604036
DTC Detecting Condition and Trouble Area
DTC TroubleshootingStep Action Yes No
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2. Go to “Electronic
Stability Program
System Check”.
2 Check DTC
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC.
Is there any DTC(s) other than C1038 and C1090? Go to applicable DTC
diag. flow.
Substitute a known-
good steering angle
sensor and recheck. If
DTC C1038 is still
detected, substitute a
known-good ESP
®
hydraulic unit control
module assembly and
recheck.
DTC Detecting Condition Trouble Area
Yaw rate / G sensor as sembly internal failure is detect ed. • Yaw rate / G sensor assembly
• ESP ® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC.
Are DTC C1034 and/or C1073 detected? Go to applicable DTC
diag. flow.
Go to step 3.
3 Check yaw rate / G sensor assembly
1) Check yaw rate / G sensor assembly referring to “Yaw
Rate / G Sensor Assembly On-Vehicle Inspection”.
Is it good condition? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Substitute a known-
good yaw rate / G
sensor assembly and
recheck.
DTC Detecting Condition
Trouble Area
Stability control is active fo r more than specified time
without yaw rate change. • ESP
® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 Check DTC for ESP ®
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ignition switch ON and check DTC for ESP ®.
Is there any DTC(s) other than C1040? Go to applicable DTC
diag. flow.
Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck.

Downloaded from www.Manualslib.com manuals search engine 4F-44 Electronic Stability Program:
DTC Troubleshooting
DTC 1071: ESP® Control Module Internal DefectS7RS0B4604056
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
1) Turn ignition switch to OFF position.
2) Check for proper connection from harness to ESP ® control module.
3) If OK, substitute an ESP ® hydraulic unit / control module assembly with correct part number.
4) Recheck system.
Step
Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 Check power supply circuit from battery
1) Check battery voltage.
Is it about 11 V or higher? Go to Step 3.
Check charging system
referring to “Battery
Inspection in Section
1J” and “Generator Test
(Undercharged Battery
Check) in Section 1J”.
3 Check fuse
1) Check main fuse for solenoid and its terminal.
Is it in good condition? Go to Step 4.
Replace fuse and check
for short circuit to
ground.
4 Check solenoid valve power supply circuit
1) Turn ignition switch to OFF position.
2) Disconnect control module connector.
3) Check for proper connection to ESP® control module at
terminal “E85-1”.
4) If OK, then measure voltage between connector terminal “E85-1” and vehicle body ground.
Is it 10 – 14 V? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. “WHT/BLU” circuit
imperfect short to
ground.
DTC Detecting Condition
Trouble Area
ESP ® control module internal defect is detected. • ESP ® control module

Downloaded from www.Manualslib.com manuals search engine Electronic Stability Program: 4F-45
DTC C1073: Lost Communication With Yaw Rate / G Sensor AssemblyS7RS0B4604038
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
[A]E85
161
15
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
3233
34
35
36
37
38
39
40
41
42
43
44
45
46
47
E85-29E85-25
E85-37
E85-31
E84-3
E84-5
E84-2E84-1 12V
GRN/BLK
BLU/RED
WHT/BLK
RED/BLK [B]
E843
521
46
1
2 3
2
I7RS0B460010-01
[A]: ESP ® control module connector (viewed from
terminal side) 1. Yaw rate / G sensor assembly 3. ESP
® hydraulic unit control module assembly
[B]: Yaw rate / G sensor assembly connector (viewed from harness side) 2. CAN driver (for yaw rate / G
sensor assembly)
DTC Detecting Condition Trouble Area
CAN line communication error in ESP ® control module
and yaw rate / G sensor assembly is detected. • CAN communication circuit (for yaw rate / G sensor
assembly)
• Yaw rate / G sensor assembly
• ESP ® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 Check each control module connectors
1) Check connection of connectors of all control modules
communicating by means of CAN (for yaw rate / G
sensor assembly).
2) Check DTC for ESP ®.
Is DTC C1073 detected? Go to Step 4.
Check for intermittent
trouble referring to
“Intermittent and Poor
Connection Inspection
in Section 00”.
3 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP ® control module and yaw
rate / G sensor assembly.
Is each CAN communicati on circuit between ESP
® control
module and yaw rate / G sensor assembly opened, shorted
or high resistance? Repair or replace the
CAN communication
line.
Go to Step 5.

Downloaded from www.Manualslib.com manuals search engine 4F-50 Electronic Stability Program:
DTC Troubleshooting
DTC U1100: Lost Communication with ECM (Reception Error)S7RS0B4604058
Wiring Diagram
Refer to “Wiring Diagram” under “DTC U1073: Control Module Communication Bus Off”.
DTC Detecting Condition and Trouble Area
DTC TroubleshootingStep Action Yes No
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2. Go to “Electronic
Stability Program
System Check”.
2 DTC check for ESP®
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC for ESP ®.
Is DTC U1073 indicated? Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
3 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control modules for open, short and high resistance.
Is each CAN communication circuit in good condition? Go to Step 4. Repair or replace the
CAN communication
line.
4 DTC check for ESP®
1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Disconnect each connector. •ECM
• Keyless start control module (if equipped)
• Combination meter
• Steering angle sensor
•BCM
3) Recheck DTC for ESP ®.
Is DTC U1073 detected? Check ESP
® control
module power and
ground circuit. If circuits
are OK, substitute a
known-good ESP ®
hydraulic unit / control
module assembly and
recheck. Check applicable
control module power
and ground circuit. If
circuit is OK, substitute
a known-good
applicable control
module and recheck.
DTC Detecting Condition
Trouble Area
ECM message data is missing from CAN communication. • CAN communication circuit
•ECM
• ESP® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 DTC check for ESP®
1) Check DTC for ESP ®.
Is DTC U1100 and DTC U1073 detected together? Go to “DTC U1073:
Control Module
Communication Bus
Off”.Go to Step 3.
3 DTC check for ECM
1) Check DTC for ECM.
Is DTC P1674 detected? Go to “DTC P1674:
CAN Communication
(Bus Off Error) in
Section 1A”.Go to Step 4.