2006 SUZUKI SX4 BCM

Downloaded from www.Manualslib.com manuals search engine 4E-7 ABS:
Te r m i n a l C i r c u i t
E081 CAN communication line (high) for ECM
2 CAN communication line (high) for BCM
3 G sensor ground (4WD model only)
4—
5—
6 G sensor signal (4WD mode only)
7 Brake light switch
8—
9 Ignition switch
10 Left-rear wheel speed sensor (–)
11 Left-front wheel speed sensor (+)
12 CAN communication line (low) for ECM
13 CAN communication line (low) for BCM
14 —
15 —
16 Data link connector
17 Right-front wheel speed sensor (–)
18 Right-front wheel speed sensor (+)
19 Right-rear wheel speed sensor (–)
20 Right-rear wheel speed sensor (+)
21 Left-rear wheel speed sensor (+)
22 Left-front wheel speed sensor (–)
23 Ground for solenoid valve
24 Power supply for solenoid valve
25 Power supply for pump motor
26 Ground for pump motor

Downloaded from www.Manualslib.com manuals search engine ABS: 4E-14
Circuit Description
ABS control module transmits indication ON signal of ABS warning light to combination meter in order to turn ABS
warning light ON. And then, combination meter turns ABS warning light ON.
If the ABS is in good condition, ABS control module transmits indication ON signal to combination meter in order to
turn 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 light driver module when ABS control module connector is disconnected.
Troubleshooting
G241 [D]
132 4 5 6 7 8 9 10111213141516
17 1918 20 2122 23 24 25 26 27 28 29 30 31 32E08 [C]
1
2
3
4
5
6
7 12
13
14
15
16
17
18
19
20
21
228
9
10
11
23
24
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26
G05 [E]
1 2 3 4 765 8 9 10 11 14 15 16
36 34 33 32 3135 24 23 2122 28 27 2526 37 39 38 4018 17 13 12 19 20
30 29
WHTGRN
3
E08-2
E08-13REDWHT 5
4 13
9
E08-23
E08-26BLKBLK
67
BLK
REDWHTG241-7G241-10
G241-16
12V
E08-25E08-24
E08-9
WHT/REDWHT/BLU
GRN/ORN
9
2
1
14
G241-31
RED/BLK
8
REDWHT9
12V
12V
11
12G05-7
G05-1G05-3
G05-8
RED/BLK
RED/BLU
10
[B]
I6RW0D450002-02
[A]: Junction block with BCM 6. ABS warning light
[B]: Junction block without BCM 7. EBD warning light (brake warning light)
[C]: ABS control module connector (viewed from terminal side) 8. Light driver module
[D]: Combination meter connector (viewed from terminal side) 9. CAN driver
[E]: BCM (viewed from harness side) 10. BCM
1. Battery 11. Brake fluid level switch
2. Main fuse box 12. Parking brake switch
3. Ignition switch 13. ABS hydraulic unit / control module assembly
4. Junction block assembly 14. CAN junction connector
5. Combination meter
Step Action Yes No
1Warning light check
1) Turn ignition switch to ON position.
Do other warning lights come ON?Substitute a known-
good combination meter
and recheck. If warning
light remains OFF,
substitute a known-
good ABS hydraulic unit
/ control module
assembly and recheck.Go to Step 2.
2Fuse check
Is circuit fuse for combination meter in good condition?Go to Step 3. Replace fuse and check
for short circuit to
ground.

Downloaded from www.Manualslib.com manuals search engine ABS: 4E-16
EBD Warning Light (Brake Warning Light) Comes ON SteadyS6RW0D4504010
Wiring Diagram
Referring to “Wiring Diagram” under “ABS Warning Light Does Not Come ON at Ignition Switch ON”.
Circuit Description
EBD warning lamp (brake warning lamp) is controlled by ABS control module and BCM through lamp driver module in
combination meter.
If EBD system is in good condition, ABS control module turns EBD warning lamp ON at the ignition switch ON, keeps
it ON for 2 seconds and then turns it OFF.
EBD warning lamp is turned ON continuously at the following conditions.
• EBD system is an abnormality
• Connector of ABS control module is disconnected
• Parking brake switch is ON
• Brake fluid level is lower than minimum level
The information of parking brake switch and brake fluid level are transmitted from BCM to lamp driver module in
combination meter through CAN communication line.
Troubleshooting
Step Action Yes No
1Parking brake and brake fluid level check
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.
2ABS warning light operation check
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.
3Parking brake switch circuit and brake fluid level switch
circuit check
1) Release parking brake completely, and replenish brake
fluid.
2) Disconnect BCM connectors with ignition switch turned
OFF.
3) Measure resistance between each parking brake switch
circuit, brake fluid level switch circuit and vehicle body
ground.
Are resistance
∞Ω?Go to Step 4. Check each applicable
circuit for short to
vehicle body ground. If
OK then check parking
brake switch and/or
brake fluid level switch.
4DTC check of BCM
1) Connect scan tool to data link connector with ignition
switch turned OFF.
2) Turn ignition switch to ON position and check DTC of
BCM.
Is there DTC U0073?Go to “DTC U0073 (No.
0073): Control Module
Communication Bus Off
in Section 10B”.Go to Step 5.

Downloaded from www.Manualslib.com manuals search engine 4E-17 ABS:
Serial Data Link Circuit CheckS6RW0D4504011
Wiring Diagram5CAN communication line circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check for proper connection to CAN communication line
wire.
4) If OK then check CAN communication line circuit
between control modules for open, short and high
resistance.
Is each CAN communication line circuit in good condition?Substitute a known-
good combination meter
and recheck. If EBD
warning light remains
OFF, substitute a
known-good BCM and/
or ABS hydraulic unit /
control module
assembly and recheck.Repair CAN
communication line
circuit. Step Action Yes No
11+BBBG
G1
12V
14BLU
REDWHTE08 [C]
1
2
3
4
5
6
7 12
13
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20
21
228
9
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11
23
24
25
26WHTGRN
3
E08-2
E08-13REDWHT 5
4 12
9
E08-23BLK
67
BLK
REDWHTG241-7G241-10
G241-16
12V
E08-25E08-24
E08-9
WHT/REDWHT/BLU
GRN/ORN
9
2
1
13
G241-31
RED/BLK
8
REDWHTREDWHT
9
10
E08-16 G04-4
G04-2
G04-1
G04-3 E04-1
E04-2
[D]
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17
18 19 20 21 22G041 2 3 4 5 6 7
8 9 10 11 12 13 14E04
G241 [E]
132 4 5 6 7 8 9 10111213141516
17 1918 20 2122 23 24 25 26 27 28 29 30 31 32 [A]
I6RW0D450008-01

Downloaded from www.Manualslib.com manuals search engine ABS: 4E-18
WHTGRN
3
E08-2
E08-13REDWHT 5
4 12
9
E08-23
E08-26BLKBLK
76
BLK
REDWHTG241-7G241-10
G241-16
12V
E08-25E08-24
E08-9
WHT/REDWHT/BLU
GRN/ORN
9
REDWHTG05-1G05-3
REDWHTG05-4G05-2
9
2
1
13
G241-31
RED/BLK
8
11+BBBG
G1
12V
E08-1614BLU 10
[C]E08
1
2
3
4
5
6
7 12
13
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228
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26
G05 [E]
1 2 3 4 765 8 9 10 11 14 15 16
36 34 33 32 3135 24 23 2122 28 27 2526 37 39 38 4018 17 13 12 19 20
30 29
G241 [D]
132 4 5 6 7 8 9 10111213141516
17 1918 20 2122 23 24 25 26 27 28 29 30 31 32 [B]
I6RW0D450003-02
[A]: Junction block with BCM 3. Ignition switch 10. BCM
[B]: Junction block without BCM 4. Junction block assembly 11. Data link connector (DLC)
[C]: ABS control module connector (viewed from
terminal side)5. Combination meter 12. ABS hydraulic unit / control module assembly
[D]: BCM connector (viewed from harness side) 6.ABS warning light 13. CAN junction connector
[E]: Combination meter connector (viewed from
terminal side)7. EBD warning light (brake
warning light)14. To TCM (A/T model), BCM, 4WD control module, P/S control
module (electric P/S model), HVAC control module (auto A/C
model) and SDM
1. Battery 8. Light driver module
2. Main fuse box 9. CAN driver

Downloaded from www.Manualslib.com manuals search engine 4E-19 ABS:
Trouble shooting
Step Action Yes No
1Scan tool communication check
Can scan tool communicate with BCM?Go to Step 2. Go to Step 3.
2ABS hydraulic unit / control module assembly power
and ground circuit check
1) Check that ABS hydraulic unit / control module assembly
power supply circuit and ground circuit is in good
condition referring to “ABS Hydraulic Unit / Control
Module Assembly Power and Ground Circuit Check”.
Are check results OK?Go to Step 3. Repair ABS hydraulic
unit / control module
assembly power or
ground circuit.
3Data link connector power source circuit check
1) Disconnect scan tool from data link connector.
2) Check for proper connection to scan tool.
3) If OK then turn ignition switch to ON position, and
measure voltage between terminal B of data link
connector and vehicle body ground.
Is voltage 10 – 12 V?Go to Step 4. Terminal B circuit open
or shorted to ground.
4Data link connector ground circuit check
1) Turn ignition switch to OFF position, and measure
resistance between the following terminals:
• Terminal G of data link connector and vehicle body
ground.
• Terminal G1 of data link connector and vehicle body
ground.
Are resistance less than 2
Ω?Go to Step 5. Terminal G and/or G1
wire circuit open or high
resistance.
5Serial communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by serial data circuit.
3) Check proper connection at serial data circuit terminals.
4) If OK, then check for high resistance, open or short to
power circuit or ground in serial data circuit.
Is check result in good condition?Go to Step 6. Repair serial data circuit
and recheck.
6CAN communication line circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
2) Check for proper connection to CAN communication line
wire.
3) If OK then check CAN communication line circuit
between control modules for open, short and high
resistance.
Is each CAN communication line circuit in good condition?Substitute a known-
good ABS hydraulic unit
/ control module
assembly and recheck.Repair CAN
communication line
circuit and recheck.

Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle: 5A-1
Transmission / Transaxle
Automatic Transmission/Transaxle
Precautions
Precautions in Diagnosing TroubleS6RW0D5100001
• Do not disconnect couplers from TCM, battery cable
from battery, TCM ground wire harness from engine or
main fuse before checking the diagnostic information
(DTC, freeze frame data, etc.) stored in TCM memory.
Such disconnection will clear memorized information
in TCM memory.
• Diagnostic information stored in TCM memory can be
cleared as well as checked by using SUZUKI scan
tool or CAN communication OBD generic scan tool.
Before using scan tool, read its Operator’s
(Instruction) Manual carefully to have good
understanding as to what functions are available and
how to use it.
It is indistinguishable which module turns on MIL
because not only ECM but also TCM turns on MIL.
Therefore, check both ECM and TCM for DTC when
MIL lights on.
When checking TCM for DTC, keep in mind that DTC
is displayed on the scan tool as follows depending on
the scan tool used.
– SUZUKI scan tool displays DTC detected by TCM.
– CAN communication OBD generic scan tool
displays DTC detected by each of ECM and TCM
simultaneously.
• Be sure to read “Precautions for Electrical Circuit
Service in Section 00” before inspection and observe
what is written there.
• TCM replacement
– When substituting a known-good TCM, check that
all relays and actuators have resistance of
specified value.
Neglecting this check may result in damage to good
TCM.
• Communication of ECM, BCM, combination meter,
keyless start control module (if equipped), ABS
control module, 4WD control module (if equipped),
TCM and DLC, is established by CAN (Controller
Area Network). (For more detail of CAN
communication for ECM, refer to “CAN
Communication System Description”). Therefore,
handle CAN communication line with care referring to
“Precaution for CAN Communication System in
Section 00”.
Precautions for Disassembly and ReassemblyS6RW0D5100002
When repairing automatic transaxle, it is necessary to
conduct the on-vehicle test to investigate where the
cause of the trouble lies first.
Then whether overhaul should be done or not is
determined. If the transaxle is disassembled without
such preliminary procedure, not only the cause of the
trouble would be unknown, but also a secondary trouble
may occur and often time would be wasted.
As the automatic transaxle consists of high precision
component, the following cautions should be strictly
observed when handling its parts in disassembly and
reassembly.
• Disassembling valve body assembly is prohibited
essentially. However, a few parts can be
disassembled. When disassembling valve body
component parts, confirm whether their parts are
allowed to disassemble or not referring to “Valve Body
Assembly Disassembly and Reassembly”.
• When component part of forward clutch, direct clutch,
2nd brake and/or O/D and 2nd coast brake, namely
clutch disc, brake disc, retaining plate and/or
separator plate, have been replaced, all learned
contents, which have been stored in TCM memory by
executing learning control, should be initialized
referring to “Learning Control Initialization”.
• Make sure to wash dirt off from the transaxle so that
no such dirt will enter the transaxle during
dismounting and remounting.
• Select a clean place free from dust and dirt for
overhauling.
• Place a rubber mat on the work bench to protect parts
from damage.
• Work gloves or shop cloth should not be used. (Use a
nylon cloth or a paper towel.)
• When separating the case joint, do not pry with a
screwdriver or such but tap with a plastic hammer
lightly.
• Make sure to wash dirt off from the transaxle so that
no such dirt will enter the transaxle during
disassembly and reassembly.
• Wash the disassembled parts in ATF (Automatic
Transaxle Fluid) or kerosene (using care not to allow
ATF or kerosene to get on your face, etc.) and confirm
that each fluid passage is not clogged by blowing air
into it. But use kerosene to wash the discs, resin
washers and rubber parts.
• Replace each gasket, oil seal and O-ring with a new
one.
• Apply ATF to sliding or rotating parts before
reassembly.

Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle: 5A-9
CAN Communication System DescriptionS6RW0D5101006
Refer to “CAN Communication System Description in Section 1A” for CAN communication System description. TCM
communicates control data with each control module as follows.
TCM Transmission Data
TCM Reception Data
DATA TCMTransmit
Transmission oil temperarure
signal
Torque request signal
Vehicle speed pulse signal
Transmission warning light
signal
MIL control signal
Transmission actual gear position
signal
A/T select lever position signal
Transmission diagnostic trouble
code (DTC)
ECMCombination
meterBCM
4WD control
module
(if equipped)
I6RW0D510001-01
Engine torque signal
Accelerator pedal position signal
Engine speed signal
Throttle position signal
A/C compressor clutch signal
Engine coolant temperature signal
Vehicle speed pulse signal
Brake pedal switch signal
Driving cycle active
Warm up cycle active Reception data from ECM
I6RW0D510002-02