App SUZUKI SWIFT 2005 2.G Service Workshop Manual

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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

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2Check wheel speed sensor circuit
1) Turn ignition switch OFF.
2) Disconnect connector from ESP ® control module and
applicable wheel speed sensor coupler.
3) Check for proper connection of ESP ® control module
and wheel speed sensor coupler.
4) If connections are OK, che ck wheel speed sensor circuit
for the following.
• Resistance of both ESP ® control module connector
(1) terminals a pair of app licable sensor terminals is
no continuity (circuit short check)
• Resistance of applicable sensor terminal of ESP ®
control module connector and vehicle body ground is
no continuity (ground short check)
• Resistance of applicable sensor terminal of ESP ®
control module connector and corresponding terminal
of wheel speed sensor connector (2) in main harness
(for front sensor) or floor harness (for rear sensor) is
continuity (continuity check)
• Voltage of applicable sensor terminal of ESP ® control
module connector and vehicle body ground is 0 V with
ignition switch turned ON (power short check)
Are they in good condition? Go to Step 3. Repair or replace
defective circuit.
3 Check wheel speed sensor
1) Remove applicable wheel speed sensor.
2) Check sensor for damage or foreign material attached.
Is it in good condition? Go to Step 4. Clean, repair or replace.
4 Check wheel encoder
1) Check front and/or rear wheel encoder for the following
(remove front drive shaft and/or rear wheel hub
assembly):
• Encoder surface neither crack nor damaged
• No foreign material being attached
• Encoder not being eccentric
• Wheel bearing free from excessive play
Are they in good condition? Go to Step 5. Clean, repair or replace
front wheel bearing and/
or rear wheel hub
assembly.
5 Check wheel speed sensor installing condition
1) Install wheel speed sensor to knuckle.
2) Tighten sensor bolt to specified torque and check that
there is no clearance between sensor and knuckle.
Is it OK? Go to Step 6. Replace wheel speed
sensor.
Step Action Yes No
1
2“E85-2”“E85-3”“E85-5”
“E85-6”
“E85-11”
“E85-12”
“E85-14”
“E85-15”
I6RS0B460017-02

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

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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.

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DTC Troubleshooting
DTC C1090: Invalid Communication with ECMS7RS0B4604040
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) 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 C1075, C1076 and C1078? Go to applicable DTC
diag. flow.
Go to Step 3.
3 Check sensor calibration
1) Calibrate all sens ors referring to “Sensor Calibration”.
2) Clear all DTC(s) and check DTC for ESP ®.
Is DTC C1075, C1076 and/ or C1078 still detected? DTC C1075: Substitute
a known-good steering
angle sensor and
recheck.
DTC C1076: Substitute
a known-good ESP
®
hydraulic unit / control
module assembly and
recheck.
DTC C1078: Substitute
a known-good yaw rate
/ G sensor assembly
and recheck. Calibration was
incompleted.
DTC Detecting Condition
Trouble Area
ESP ® control module rolling counte r failure is detected by
ECM. • 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) 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 C1038 and C1090? Go to applicable DTC
diag. flow.
Go to Step 3.
3 DTC check for ECM
1) Check DTC for ECM.
Is DTC P1674 and/or DTC P1685 detected? 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-48 Electronic Stability Program:
DTC C1091 / C1094: ECM Data in CAN Line Failure / Invalid Torque Control Communication with
ECM
S7RS0B4604041
DTC Detecting Condition and Trouble Area
DTC TroubleshootingDTC Detecting Condition Trouble Area
C1091:
ECM sent invalid signal to ESP ® control module.
C1094:
Reception error of torque control signal with ECM • Engine control system
•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) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP ®.
Is DTC C1090 detected? Go to applicable DTC
diag. flow.
Go to step 3.
3 DTC check other control module than ESP ®
1) Check DTC for ECM.
Is there any DTC(s)? 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-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.

Downloaded from www.Manualslib.com manuals search engine Electronic Stability Program: 4F-51
DTC U1126: Lost Communication with Steering Angle Sensor (Reception Error)S7RS0B4604043
Wiring Diagram
Refer to “Wiring Diagram” under “DTC U1073: Control Module Communication Bus Off”.
DTC Detecting Condition and Trouble Area
DTC Troubleshooting4
Check each control module connectors
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Check DTC for ESP ®.
Is DTC U1100 detected? Go to Step 5. Check for intermittent
trouble referring to
“Intermittent and Poor
Connection Inspection
in Section 00”.
5 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP ® control module and
ECM communicating by means of CAN.
3) Check CAN communication circuit between ESP®
control module and ECM for open, short and high
resistance.
Is each CAN communication circuit in good condition? Repair or replace the
CAN communication
line.
Go to Step 6.
6 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check CAN communication circuit between control modules other than Step 5 for open, short and high
resistance.
Is each CAN communication circuit in good condition? Go to Step 7. Repair or replace the
CAN communication
line.
7 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 U1100 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.
Step Action Yes No
DTC Detecting Condition
Trouble Area
Steering angle sensor message data is missing from CAN
communication. • CAN communication circuit
• 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) Check DTC for ESP ®.
Is DTC U1126 and DTC U1073 detected together? Go to “DTC U1073:
Control Module
Communication Bus
Off”.Go to Step 3.

Downloaded from www.Manualslib.com manuals search engine 4F-52 Electronic Stability Program:
DTC U1140: Lost Communication with BCM (Reception Error)S7RS0B4604045
Wiring Diagram
Refer to “Wiring Diagram” under “DTC U1073: Control Module Communication Bus Off”.
DTC Detecting Condition and Trouble Area3
Check each control module connectors
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Check DTC for ESP ®.
Is DTC U1126 detected? Go to Step 4. Check for intermittent
trouble referring to
“Intermittent and Poor
Connection Inspection
in Section 00”.
4 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP ® control module, BCM
and steering angle sensor communicating by means of
CAN.
3) Check CAN communication circuit for open, short and high resistance.
• Between ESP ® control module and BCM
• Between steering angle sensor and BCM
Is each CAN communication circuit in good condition? Repair or replace the
CAN communication
line.
Go to Step 5.
5 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check CAN communication circuit between control modules other than Step 4 for open, short and high
resistance.
Is each CAN communication circuit in good condition? Go to Step 6. Repair or replace the
CAN communication
line.
6 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
• Combination meter
• Steering angle sensor
•BCM
3) Check DTC for ESP ®.
Is DTC U1126 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.
Step Action Yes No
DTC Detecting Condition
Trouble Area
BCM message data is missing from CAN communication. • CAN communication circuit
•BCM
• ESP® control module

Downloaded from www.Manualslib.com manuals search engine Electronic Stability Program: 4F-53
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 DTC for ESP ®.
Is DTC U1140 and DTC U1073 detected together? Go to “DTC U1073:
Control Module
Communication Bus
Off”.Go to Step 3.
3 DTC check for BCM
1) Check DTC for BCM.
Is DTC U1073 detected? Go to “DTC U1073 (No.
1073): Control Module
Communication Bus Off
in Section 10B”.Go to Step 4.
4 Check each control module connectors
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Check DTC for ESP ®.
Is DTC U1140 detected? Go to Step 4. Check for intermittent
trouble referring to
“Intermittent and Poor
Connection Inspection
in Section 00”.
5 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP ® control module and
BCM communicating by means of CAN.
3) Check CAN communication circuit between ESP®
control module and BCM for open, short and high
resistance.
Is each CAN communication circuit in good condition? Repair or replace the
CAN communication
line.
Go to Step 6.
6 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check CAN communication circuit between control modules other than Step 5 for open, short and high
resistance.
Is each CAN communication circuit in good condition? Go to Step 7. Repair or replace the
CAN communication
line.
7 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
• Combination meter
• Steering angle sensor
•BCM
3) Check DTC for ESP ®.
Is DTC U1140 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.