Warning engine light SUZUKI SWIFT 2008 2.G Service User Guide

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General Description
ABS DescriptionS7RS0B4501001
The ABS (Antilock Brake System) controls the fluid
pressure applied to the wheel cylinder of each brake
from the master cylinder so that each wheel is not locked
even when hard braking is applied.
This ABS has also the following function.
While braking is applied, but before ABS control
becomes effective, braking force is distributed between
the front and rear so as to prevent the rear wheels from
being locked too early for better stability of the vehicle.
The main component parts of this ABS include the
following parts in addition to those of the conventional
brake system.
• Wheel speed sensor which senses revolution speed of each wheel and outputs its signal.
• ABS warning light which light s to inform abnormality
when system fails to operate properly.
• ABS hydraulic unit / cont rol module assembly is
incorporated ABS co ntrol module, ABS hydraulic unit
(actuator assembly), solenoid valve power supply
driver (transistor), solenoid valve driver (transistor),
pump motor driver (transistor).
– ABS control module which sends operation signal to ABS hydraulic unit to control fluid pressure
applied to each wheel cylinder based on signal
from each wheel speed sensor so as to prevent
wheel from locking.
– ABS hydraulic unit which operates according to signal from ABS control module to control fluid
pressure applied to wheel cylinder of each 4
wheels.
– Solenoid valve power supp ly driver (transistor)
which supplies power to solenoid valve in ABS
hydraulic unit.
– Solenoid valve driver (transistor) which controls each solenoid valves in ABS hydraulic unit.
– Pump motor driver (transistor) which supplies power to pump motor in ABS hydraulic unit.
This ABS is equipped with Electronic Brake force
Distribution (EBD) system that controls a fluid pressure
of rear wheels to best condition, which is the same
function as that of proportion ing valve, by the signal from
wheel sensor independently of change of load due to
load capacity and so on. An d if the EBD system fails to
operate properly, the brake warning light lights to inform
abnormality.
ABS Hydraulic Unit / Control Module Assembly
Description
S7RS0B4501002
ABS control module is a component of ABS hydraulic
unit / control module asse mbly and has the following
functions.
Self-Diagnosis Function
ABS control module diagnose s conditions of the system
component parts (whether or not there is any
abnormality) all the time and indicates the results
(warning of abnormality occurrence and DTC) through
the ABS warning light as described.
• When ignition switch is turned ON, ABS warning light lights for 2 seconds to check its circuit.
• When no abnormality has been detected (the system is in good condition), ABS warning light turns OFF
after 2 seconds.
• When an abnormality in th e system is detected, ABS
warning light lights and the area where that
abnormality lies is stored in the memory of EEPROM
in ABS control module.
1
I4RS0A450001-01

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Schematic and Routing Diagram
ABS SchematicS7RS0B4502001
INPUTOUTPUT
ABS control moduleWheel speed sensor (LF)
Wheel speed sensor (LR)
Wheel speed sensor (RF)Battery Voltage
Ignition Voltage
Pump motor
driver (transistor)
Solenoid valve power
supply driver (transistor)
Solenoid valve
driver (transistor) Hydraulic unit
Pump motor
LF inlet solenoid valve
LF outlet solenoid valve
LR inlet solenoid valve
LR outlet solenoid valve
RF inlet solenoid valve
RF outlet solenoid valve
RR inlet solenoid valve
RR outlet solenoid valve
Data link connector
ABS hydraulic unit/control
module assembly
Wheel speed sensor (RR)
3 7
2
645
8 12
14
21
15
16
1
13
18
17
19
19
11
10
9
CAN driverStop lamp switch
Engine torque
ECM
ABS warning light
EBD warning light
Combination meter
Torque request
ECMWheel speed signal (LF)
Wheel speed signal (LR)
Wheel speed signal (RF)
Wheel speed signal (RR)
ABS active
I6RS0C450003-03

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ABS Wiring Circuit DiagramS7RS0B4502002
1. ABS hydraulic unit / control module assembly 8.
Pump motor 15. Wheel speed sensor (Right-front)
2. ABS control module 9. Stop lamp switch 16. Wheel speed sensor (Left-front)
3. ABS hydraulic unit 10. ABS warning light 17. Wheel speed sensor (Right-rear)
4. Solenoid valve power supply driver (transistor) 11. EBD warnin g light (Brake warning light) 18. Wheel speed sensor (Left-rear)
5. Solenoid valve driver (transistor) 12. Lamp driver module 19. Battery
6. Pump motor driver (transistor) 13. 4 way joint 20. Ignition switch
7. Solenoid valve 14. Data link connector 21. ECM
[A]
14
1516171819202122232425 1
23456789101112
13
26 E03
a
WHT/BLU
BLKWHT/BLU
M
12V
9
10 11 12
13
BLKE03-14E03-1
E03-13
E03-26
YELBRN
14E03-24
LT GRN/BLKLT GRN
15
WHTWHT/BLK
16
RED
WHTBLK
WHTBLK
WHTBLK
WHTBLKRED/BLK
17
12V
PPL/WHT
18E03-5
1912V
5V
12V
23
24
VCC22
E03-25
E03-15E03-16
E03-19E03-18
E03-22E03-21
WHT/RED
WHT/RED
+BB
GRN/ORN
E03-7
WHT/BLUGRN
1
2
3
4
8
RED/BLK
E03-12
E03-6
RED
WHTE03-10E03-8
REDWHT
20 7
6
529
29
G28-8
G28-10
25
29
E23-3E23-18
GRN/WHT
21
PPL
12V
E23-20
12V
12V
12V
12V
REDWHTE46-1
E46-2
BLK
RED/BLK
RED/BLK
RED
RED
WHT
WHT
27
28
26
29
G37-2
G37-4
REDWHT
I6RS0C450004-01
[A]: Terminal arrangement of ABS hydraulic unit / control module assembly 10. Solenoid valve power supply driver
(transistor) 21. Brake light switch
a: Upside 11. ABS pump motor driver (transistor) 22. Power control unit

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1. Battery12. Pump motor23. Internal memory
2. Main fuse box 13. Solenoid valves24. Solenoid valve driver (transistor)
3. Ignition switch 14. Right-rear wheel speed sensor25. ECM
4. Circuit fuse box 15. Left-rear wheel speed sensor26. BCM
5. Combination meter 16. Right-front wheel speed sensor27. Brake fluid level switch
6. ABS warning light 17. Left-front wheel speed sensor28. Parking brake switch
7. EBD warning light (Brake warning light) 18. Data link connector29. CAN driver
8. Lamp driver module 19. To ECM, SDM and BCM
9. ABS hydraulic unit / control module assembly 20. Stop lamp
Terminal Wire color Circuit
E03 1
WHT/RED ABS pump motor driver (Transistor)
2— —
3— —
4— —
5 PPL/WHT Data link connector
6 WHT CAN communication line (low) for BCM
7 GRN/ORN Ignition switch
8 WHT CAN communication line (low) for ECM
9— —
10 RED CAN communication line (high) for ECM
11 — —
12 RED CAN communication line (high) for BCM
13 BLK Ground
14 WHT/BLU Solenoid valve power supply driver (Transistor)
15 LT GRN/BLK Left–rear wheel speed sensor (–)
16 LT GRN Left–rear wheel speed sensor (+)
17 — —
18 WHT Right–front wheel speed sensor (+)
19 WHT/BLK Right–front wheel speed sensor (–)
20 — —
21 RED/BLK Left–front wheel speed sensor (–)
22 RED Left–front wheel speed sensor (+)
23 — —
24 YEL Right–rear wheel speed sensor (+)
25 BRN Right–rear wheel speed sensor (–)
26 BLK Ground

Downloaded from www.Manualslib.com manuals search engine 4E-7 ABS:
Component Location
ABS Components LocationS7RS0B4503001
Front Wheel Speed Sensor Components LocationS7RS0B4503002
14
5
3
2 2
2
2
6
6
6
6
7
8
I6RS0C450005-01
1. ABS hydraulic unit / control module assembly
5. EBD warning light (Brake warning light)
2. Wheel speed sensors 6. Wheel speed sensor rings
3. Stop lamp switch 7. Data link connector
4. ABS warning light 8. ECM
[A]
[B]
1 1
2
3
4
1
(a)
(b)
5I6RS0C450016-01
[A]: OK 2. Grommet5. Front wheel bearing
[B]: NG 3. Connector: 25 N⋅m (2.5 kgf-m, 18.0 lb-ft)
1. Front wheel speed sensor 4. Sensor ring: 11 N⋅m (1.1 kgf-m, 8.0 lb-ft)

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Problem symptom confirmation
Check if what the customer claimed in “Customer
Questionnaire” is actually found in the vehicle and if that
symptom is found, whether it is identified as a failure.
(This step should be shared with the customer if
possible.) Check warning lights related to brake system
referring to “EBD Warning Light (Brake Warning Light)
Check” and “ABS Warning Light Check”.
DTC check, record and clearance
Perform “DTC Check” proced ure, record it and then
clear it referring to “DTC Clearance”.
Recheck DTC referring to “DTC Check”.
When DTC which is recorded at DTC check procedure is
detected again after performi ng DTC clearance, go to
“Step 4: ABS Check: ” to proceed the diagnosis.
When DTC which is recorded at DTC check procedure is
not indicated anymore after performing DTC clearance,
ABS control module does not perform the system
diagnosis, or temporary abnormality may occur,
therefore go to “Step 2: Driving Test: ” to proceed the
diagnosis.
Step 2: Driving Test
Test drive the vehicle at 40 km/h for more than a minute
and check if any trouble symptom (such as abnormal
lighting of ABS warn ing light) exists.
If the malfunction DTC is co nfirmed again at ignition
switch ON, driving test as described is not necessary.
Proceed to Step 3.
Step 3: DTC Check
Recheck DTC referring to “DTC Check”.
Step 4: ABS Check
According to ABS Check for the DTC confirmation in
Step 3, locate the cause of the trouble, namely in a
sensor, switch, wire harness, connector, actuator
assembly or other part and repair or replace faulty parts.
Step 5: Brakes Diagnosis
Check the parts or system suspected as a possible
cause referring to “Brakes Symptom Diagnosis in
Section 4A” and based on symptoms appearing on the
vehicle (symptom obtained through Steps 1 and 2 and
repair or replace faulty parts, if any).
Step 6: Check for Intermittent Problem
Check parts where an intermittent trouble is easy to
occur (e.g., wire harness, con nector, etc.), referring to
“Intermittent and Poor Connection Inspection in Section
00” and related circuit of trouble code recorded in Step 1
to 3.
Step 7: Final Confirmation Test
Confirm that the problem symptom has gone and the
ABS is free from any abnormal conditions. If what has
been repaired is related to the malfunction DTC, clear
the DTC once referring to “DTC Clearance” and perform
test driving and confirm that no DTC is indicated.ABS Warning Light CheckS7RS0B4504002
1) Turn ignition switch ON.
2) Check that ABS warning light (1) comes ON for
about 2 seconds and then goes off.
If any faulty condition is found, advance to “ABS
Warning Light Does Not Come ON at Ignition Switch
ON” or “ABS Warning Light Comes ON Steady”.
EBD Warning Light (Brake Warning Light)
Check
S7RS0B4504003
NOTE
Perform this check on a level place.

1) Turn ignition switch ON with parking brake applied.
2) Check that EBD warning lig ht (brake warning light)
(1) is turned ON.
3) Release parking brake with ignition switch ON and check that EBD warning lig ht (brake warning light)
goes off.
If it doesn’t go off, go to “EBD Warning Light (Brake
Warning Light) Comes ON Steady”.
11
I4RS0A450007-01
BRAKE
1
I4RS0A450008-01

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DTC ClearanceS7RS0B4504006
WARNING!
When performing a driving test, select a safe
place where there is neither any traffic nor
any traffic accident possibility and be very
careful during testing to avoid occurrence of
an accident.

After repair or replace malfunction part(s), clear all DTCs
by performing the following procedure or using SUZUKI
scan tool.
1) Connect SUZUKI scan tool to data link connector in the same manner as when making this connection
for DTC check.
2) Turn ignition switch to ON position.
3) Erase DTC according to instructions displayed on scan tool. Refer to scan tool operator’s manual for
further derails.
NOTE
For DTC C 1021, C1022, C1025, C1026, C1031,
C1032, C1035, C1036 and C1061, confirm that
ABS warning light turns off after performing
Step 2 of “Test Driving” under “ABS Check”,
and then clear the DTCs.

4) After completing the clear ance, turn ignition switch
OFF and disconnect scan tool from data link
connector.
5) Perform “Driving Test” (S tep 2 of “ABS Check”) and
“DTC Check” and confirm that NO DTC is displayed
on scan tool.
Scan Tool DataS7RS0B4504007
The parameter data below are values measured with the
scan tool when the normally operating vehicle is under
the following conditions. When taking measurements for
comparison by using the scan tool, be sure to check that
the vehicle is under the following conditions.
• Apply parking brake and block wheels.
• Ignition switch ON.
• Turn OFF air conditioner (if equipped).
• Apply no load to power steering (if equipped). (Don’t turn it)
• Turn OFF all electric loads (except ignition).
• No DTC.
• ABS is not operated. (N ormal braking operation)
Scan Tool Data Definition
Battery Volt (V): Battery Voltage is an analog input
signal read by the ABS control module. Certain ABS
control module function s will be modified if the
battery voltage falls below or rises above
programmed thresholds.
Pump Motor Driver (V): This parameter indicates the
operational condition of the pump motor driver
(transistor).
RF Wheel Speed, LF Wheel Speed, RR Wheel Speed and LF Wheel Speed (km/h, MPH): Wheel speed
is an ABS control module inte rnal parameter. It is
computed by reference pulses from the wheel speed
sensor.
Brake Switch (ON, OFF): This switch signal informs
the ABS control modu le whether the brake is active
or not.
Scan Tool
Data Standards Condition
Battery
Voltage 10.0 – 18.0 V —
Pump Motor
Driver 0.0 V —
RF Wheel
Sp ee d 0 km/h, 0.0 MPH Vehicle stop
LF Wheel
Sp ee d 0 km/h, 0.0 MPH Vehicle stop
RR Wheel
Sp ee d 0 km/h, 0.0 MPH Vehicle stop
LR Wheel
Sp ee d 0 km/h, 0.0 MPH Vehicle stop
Brake Switch ONBrake pedal
depressed
OFF Brake pedal released

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ABS Warning Light Does Not Come ON at Ignition Switch ONS7RS0B4504008
Wiring Diagram
Circuit Description
Operation (ON/OFF) of ABS warning light is controlled by ABS contro l module through lamp driver module in
combination meter.
If the antilock brake system is in good condition, ABS control module turns ABS warning light ON at the ignition switch
ON, keeps it ON for 2 seconds and then turns it OFF. If an abnormality in the system is detected, ABS warning light is
turned ON continuously by ABS control module. Also, it is turned ON continuously by la mp driver module when the
connector of ABS control module is disconnected.
Troubleshooting
WHT/BLU
BLK 12V
9
BLK
E03-14
E03-13
E03-26
WHT/RED
GRN/ORNE03-7WHT/BLUGRN
1
2
3
48
RED/BLK
76
5
10
E03-112V[A]
E03
15
16
17
18
19
20
21
22
23
24
25 2
3
4
5
6
7
8
9
10
11
12
1
13
14
26
BLK/ORN
E03-12
E03-6
REDWHT
10
G28-8
G28-10
REDWHTE46-1
E46-2
RED/BLK
RED/BLK
RED
RED
WHT
WHT
12
13
11
10
G37-2
G37-4
I6RS0C450007-01
[A]: ABS hydraulic unit / control module connector (viewed from terminal side) 5. Combination meter 10. CAN driver
1. Battery 6. ABS warning light 11. BCM
2. Main fuse box 7. EBD warning light (Brake warning light) 12. Brake fluid level switch
3. Ignition switch 8. Lamp driver module 13. Parking brake switch
4. Circuit fuse box 9. ABS hydraulic unit / control module assembly
Step Action YesNo
1 1) Turn ignition switch to ON position.
Do other warning lights come ON? Go to Step 2.
Go to Step 3.
2 1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ignition switch to ON position and check DTC.
Is there DTC U1073? Go to “DTC U1073:
Control Module
Communication Bus
Off”.
Substitute a known-
good combination meter
and recheck. If ABS
warning light remains
OFF, substitute a
known-good ABS
hydraulic unit / control
module assembly and
recheck.
3 Is Circuit fuse fo r combination meter in good condition? Go to Step 4.Replace fuse and check
for short circuit to
ground.

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ABS Warning Light Comes ON SteadyS7RS0B4504009
Wiring Diagram
Refer to “ABS Warning Light Does Not Come ON at Ignition Switch ON”.
Circuit Description
Operation (ON/OFF) of ABS wa rning light is controlled by ABS contro l module through lamp driver module in
combination meter.
If the Antilock brake system is in good condition, ABS control module turns ABS warning lig ht ON at the ignition switch
ON, keeps it ON for 2 seconds and then turns it OFF. If an abnormality in the system is detected, ABS warning light is
turned ON continuously by ABS c ontrol module. Also, it is turned ON continuously by la mp driver module when the
connector of ABS control module is disconnected.
Troubleshooting 4 Check CAN communication circuit between combination
meter and ABS control module referring to “DTC U1073:
Control Module Communication Bus Off”.
Is CAN communication circuit in good condition? Go to Step 5.
Repair or replace.
5 1) Remove combination meter wit h ignition switch turned
OFF.
2) Check for proper connection to “RED/BLK” and “BLK/ ORN” wire of combinat ion meter connector.
3) If OK, turn ON ignition switch and measure voltage at “PPL/RED” wire of combi nation meter connector and
vehicle body ground.
Is it 10 – 14 V? Go to Step 6.
Repair power supply
circuit for combination
meter.
6 1) Measure resistance between “BLK/ORN” wire of combination meter connector and vehicle body ground.
Is resistance less than 2
Ω? Replace combination
meter.
“BLK/ORN” circuit open
or high resistance.
Step Action Yes No
Step
Action YesNo
1 1) Perform diagnostic trouble code check.
Is there any DTC(s)? Go to applicable DTC
diag. flow.
Go to Step 2.
2 Are main fuses for ABS pump motor and ABS solenoid in
good condition? Go to Step 3.
Replace fuse and check
circuit for short to
ground.
3 1) Turn ignition switch to OFF.
2) Disconnect ABS control module connector.
3) Check for proper connection to ABS control module connector at terminals “E03-7”, “E03-13” and “E03-26”.
4) If OK then turn ignition switch to ON position and measure voltage between terminal “E03-7” and vehicle
body ground.
Is it 10 – 14 V? Go to Step 4.
“GRN/ORN” circuit
open.
4 1) Turn ignition switch to OFF position. 2) Check for proper connection to ABS control module connector at terminals “E03-1” and “E03-14”.
3) If OK then turn ignition switch to ON position and measure voltage between each terminal of “E03-1”,
“E03-14” and vehicle body ground.
Are they 10 – 14 V? Go to Step 5.
“WHT/RED” and/or
“WHT/BLU” circuit
open.

Downloaded from www.Manualslib.com manuals search engine 4E-15 ABS:
EBD Warning Light (Brake Warning Light) Comes ON SteadyS7RS0B4504010
Wiring Diagram
Refer to “ABS Warning Light Does Not Come ON at Ignition Switch ON”.
Circuit Description
EBD warning light (brake warn ing light) is controlled by parking brake switch, brake fluid level switch and ABS
hydraulic unit / control module assembly throug h lamp driver module in combination meter.
EBD warning light turns ON when parki ng brake switch is ON and/or brake fluid level is lower than minimum level.
The information of parking brake switch and brake fluid leve l are transmitted from BCM to lamp driver module in
combination meter through CAN communication line.
Troubleshooting 5 1) Turn ignition switch to OFF and measure resistance
between each terminal of “E03-13”, “E03-26” and vehicle
body ground.
Is resistance less than 2
Ω? Go to Step 6. Ground circuit for ABS
hydraulic unit / control
module open or high
resistance.
6 Check CAN communication circuit between combination meter and ABS control module referring to “DTC U1073:
Control Module Communication Bus Off”.
Is CAN communication circuit in good condition? Substitute a known-
good combination meter
and recheck. If ABS
warning light remains
ON, substitute a known-
good ABS hydraulic unit
/ control module
assembly and recheck.Repair or replace.
Step Action Yes No
Step
Action YesNo
1 1) Make sure that:
• Parking brake is completely released.
• Brake fluid level is upper than the minimum level.
Are the check results OK? Go to Step 2.
Release parking brake
completely and/or
replenish brake fluid.
2 1) Turn ignition switch to ON position. Does “ABS” warning light come on steady? Perform “ABS Warning
Light Comes ON
Steady” previously
outlined.Go to Step 3.
3 1) CAN communication circuit between combination meter, ABS hydraulic unit / control module and BCM referring to
“DTC U1073: Control Module Communication Bus Off”.
Is CAN communication circuit in good condition? Substitute a known-
good combination meter
and recheck. If ABS
warning light remains
ON, substitute a known-
good ABS hydraulic unit
/ control module
assembly and recheck.Repair or replace.