2006 SUZUKI SX4 Ignition system

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4WD Position Indicator Remains ON Steady at Ignition Switch ONS6RW0D3204014
Wiring Diagram
Refer to “4WD Position Indicator Does Not Come ON at Ignition Switch ON but Engine Stops”.
Circuit Description
Transfer position indicator operates according to the signal from 4WD control module. If the 4WD control system is in
good condition, 4WD position indicator light up for 2 seconds when ignition switch is turned to ON position, and then
turned to OFF position. If an abnormality is detected in the system, 4WD position indicator remains lighting.
Troubleshooting3CAN communication circuit check
1) Check CAN communication circuit between combination
meter and 4WD control module referring to “DTC U0073:
Control Module Communication Bus Off”.
Is CAN communication circuit in good condition?Go to Step 4. Repair or replace.
4“METER” fuse check
1) Turn ignition switch to OFF position.
2) Check for fuse blown to “METER” fuse in junction block
assembly.
Is “METER” fuse in good condition?Go to Step 5. Replace “METER” fuse
and check for short.
5Combination meter power supply check
1) Remove combination meter referring to “Combination
Meter Removal and Installation in Section 9C”.
2) Check proper connection to “WHT/RED” and “BLK” wire
terminal of combination meter connector.
3) If OK, then turn ignition switch to ON position and
measure voltage between “WHT/RED” wire terminal of
combination meter connector and vehicle body ground.
Is it 10 – 14 V?Go to Step 6. “WHT/RED” wire is
open circuit.
6Combination meter ground circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between “BLK” wire terminal of
combination meter connector and vehicle body ground.
Is resistance 1
Ω or less?Substitute a known-
good combination meter
and recheck. If 4WD
position indicator still
remains OFF, substitute
a known-good 4WD
control module and
recheck.“BLK” wire is open or
high resistance circuit. Step Action Yes No
Step Action Yes No
1Check DTC
1) Check DTC referring to “DTC Check”.
Is there any DTC(s)?Perform DTC flow to
repair and retry.Go to Step 2.
2CAN communication circuit check
1) Check CAN communication circuit between combination
meter and 4WD control module referring to “DTC U0073:
Control Module Communication Bus Off”.
Is CAN communication circuit in good condition?Substitute a known-
good combination meter
and recheck. If 4WD
position indicator still
remains off, substitute a
known-good 4WD
control module and
recheck.Repair or replace.

Downloaded from www.Manualslib.com manuals search engine 3B-17 Differential:
DTC C1240: 4WD Control Module Power Supply Circuit MalfunctionS6RW0D3204015
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Turn ignition switch to ON position for 10 seconds.
3) Check DTC.
Troubleshooting
[A]: 4WD control module connector “G26” (viewed from harness side) 3. “4WD” fuse
1. 4WD control module 4. Main fuse box
2. “IG COIL” fuse
DTC detecting condition Trouble area
4WD control module power supply voltage is out of specification. 4WD control module power supply circuit
5V
5V
G26-12
G26-11
G26-10BLK
WHT/RED
RED/BLK
1
2
3
4
YEL
1 2 3
4 5
6 7 8 9 10 11
12
13
14 15 16
17 18 19
20
21 22
23
24 25 26
[A]
I7RW01320005-01
Step Action Yes No
1Was “4WD control system check” performed?Go to Step 2. Go to “4WD Control
System Check”.
24WD control module power circuit check
1) Disconnect 4WD control module connector with ignition
switch OFF.
2) Check for proper connection to “G26” terminal of 4WD
control module connector.
3) If connection is OK, measure voltage between “G26-11”
terminal of 4WD control module connector and vehicle
body ground with ignition switch ON.
Is it 10 – 14 V?Poor “G26-11”
connection or
intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If wire and
connections are OK,
substitute a known-
good 4WD control
module and recheck.“4WD” fuse blown,
“WHT/RED” or “YEL”
wire is circuit open or
circuit short.

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Troubleshooting
Step Action Yes No
1Was “4WD control system check” performed?Go to Step 2. Go to “4WD Control
System Check”.
2Coupling air temperature sensor circuit check
1) Disconnect connector from coupling air temperature
sensor with ignition switch turned OFF.
2) Check for proper connection to “BRN” and “ORN”
terminals of coupling air temperature sensor connector.
3) If connection is OK, measure voltage between “BRN”
terminal of coupling air temperature sensor connector
and vehicle body ground with ignition switch turned ON.
Is it 4 – 6 V?Go to Step 3. Go to Step 5.
3Coupling assembly ground circuit check
1) Disconnect connector from 4WD control module with
ignition switch turned OFF.
2) Measure resistance between “ORN” terminal of coupling
air temperature sensor connector and “G26-24” terminal
of 4WD control module connector with ignition switch
turned OFF.
Is resistance below 5
Ω?Go to Step 4. “ORN” wire is open or
high resistance.
4Coupling air temperature sensor check
1) Check coupling air temperature sensor referring to
“Coupling Air Temperature Sensor Inspection”.
Is it in good condition?Substitute a known-
good 4WD control
module and recheck.Replace coupling air
temperature sensor.
5Coupling assembly circuit check
1) Disconnect connector from 4WD control module with
ignition switch turned OFF.
2) Check for proper connection to “G26-25” and “G26-24”
terminals of 4WD control module connector.
3) If connection is OK, measure resistance between “G26-
25” terminal of 4WD control module connector and
vehicle body ground.
Is resistance below 5
Ω?“BRN” wire is open or
high resistance circuit.Substitute a known-
good 4WD control
module and recheck.

Downloaded from www.Manualslib.com manuals search engine 3B-21 Differential:
DTC C1251: Coupling Air Temperature Sensor Circuit ShortS6RW0D3204018
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Turn ignition switch to ON position for 10 seconds.
3) Check DTC.
Troubleshooting
[A]: 4WD control module connector “G26” (viewed from harness side) 2. 4WD control module
1. Coupling air temperature sensor
DTC detecting condition Trouble area
Input signal from coupling air temperature sensor is lower than
specified value.• Coupling air temperature sensor
• Coupling air temperature sensor circuit
• 4WD control module
2
G26-25
G26-24ORN
BRN
5V
1
1 2 3
4 5
6 7 8 9 10 11
12
13
14 15 16
17 18 19
20
21 22
23
24 25 26
[A]
I7RW01320006-01
Step Action Yes No
1Was “4WD control system check” performed?Go to Step 2. Go to “4WD Control
System Check”.
2Coupling air temperature sensor circuit check
1) Disconnect connector from coupling air temperature
sensor with ignition switch turned OFF.
2) Check for proper connection to “BRN” and “ORN”
terminals of coupling air temperature sensor connector.
3) If connection is OK, measure voltage between “BRN”
terminal of coupling air temperature sensor connector
and vehicle body ground with ignition switch turned ON.
Is it 4 – 6 V?Go to Step 3. Go to Step 5.

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DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Start engine and select 2WD/4WD switch to “LOCK” position.
3) Keep engine running at 2000 rpm for 10 seconds. or more.
4) Stop engine and check DTC.
Troubleshooting
Step Action Yes No
1Was “4WD control system check” performed?Go to Step 2. Go to “4WD Control
System Check”.
2Coupling assembly circuit check
1) Disconnect coupling assembly connector “L102” with
ignition switch turned OFF.
2) Check for proper connection to “L102-1” and “L102-4”
terminals of coupling assembly connector.
3) If connection is OK, measure voltage between “L102-1”
terminal of coupling assembly connector and vehicle
body ground.
Is it 10 – 14 V?Go to Step 3. Go to Step 6.
3Coupling assembly ground circuit check
1) Measure resistance between “L102-4” terminal of
coupling assembly connector and vehicle body ground
with ignition switch turned OFF.
Is resistance below 5
Ω?Go to Step 4. Go to Step 5.
4Coupling assembly check
1) Check coupling assembly referring to “Coupling
Assembly Inspection”.
Is it in good condition?Substitute a known-
good 4WD control
module and recheck.Replace coupling
assembly.
5Coupling assembly circuit check
1) Disconnect connector from 4WD control module
connector “G26” with ignition switch turned OFF.
2) Check for proper connection to “G26-2” and “G26-3”
terminals of 4WD control module connector.
3) If connection is OK, measure resistance between “G26-
2” terminal of 4WD control module connector and
vehicle body ground.
Is resistance below 5
Ω?“YEL” wire is open or
high resistance circuit.Substitute a known-
good 4WD control
module and recheck.
6Coupling assembly circuit check
1) Disconnect connector from 4WD control module
connector “G26” with ignition switch turned OFF.
2) Check for proper connection to “G26-3” terminal of 4WD
control module connector.
3) If connection is OK, measure resistance between “G26-
3” terminal of 4WD control module connector and “L102-
1” terminal of coupling assembly connector.
Is resistance below 5
Ω?Substitute a known-
good 4WD control
module and recheck.“GRY” wire is open or
high resistance circuit.

Downloaded from www.Manualslib.com manuals search engine Differential: 3B-24
DTC C1253: Coupling Assembly Circuit ShortS6RW0D3204020
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Start engine and select 2WD/4WD switch to “LOCK” position.
3) Keep engine running at 2000 rpm for 10 seconds. or more.
4) Stop engine and check DTC.
Troubleshooting
12V
G26-3
YEL GRY
G26-2
L102-1
L102-4 12
1 2 3
4 5
6 7 8 9 10 11
12
13
14 15 16
17 18 19
20
21 22
23
24 25 26
[A]
21
[B]
I7RW01320007-01
[A]: 4WD control module connector “G26” (viewed from harness side) 1. Coupling assembly
[B]: Coupling assembly connector “L102” (viewed from harness side) 2. 4WD control module
DTC detecting condition Trouble area
2WD/4WD switch is changed of 4WD lock position, and then
vehicle is not changed for more than 5 seconds.• Coupling assembly
• Coupling assembly circuit
• 4WD control module
Step Action Yes No
1Was “4WD control system check” performed?Go to Step 2. Go to “4WD Control
System Check”.
2Coupling assembly circuit check
1) Disconnect coupling assembly connector “L102” with
ignition switch turned OFF.
2) Check for proper connection to “L102-1” and “L102-4”
terminals of coupling assembly connector.
3) If connection is OK, measure voltage between “L102-1”
terminal of coupling assembly connector and vehicle
body ground.
Is it 10 – 14 V?Go to Step 3. Go to Step 6.
3Coupling assembly ground circuit check
1) Measure resistance between “L102-4” terminal of
coupling assembly connector and vehicle body ground
with ignition switch turned OFF.
Is resistance below 5
Ω?Go to Step 4. Go to Step 5.

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DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Clear DTC using scan tool.
2) Select 2WD/4WD switch to “2WD” position and keep its position for 10 seconds. Similarly select 2WD/4WD switch
to “AUTO” and “LOCK” position.
3) Check DTC.
TroubleshootingDTC detecting condition Trouble area
2WD/4WD switch combination different from specification is
detected for more than 5 seconds.• 2WD/4WD switch
• 2WD/4WD switch circuit
• 4WD control module
Step Action Yes No
1Was “4WD control system check” performed?Go to Step 2. Go to “4WD Control
System Check”.
22WD/4WD switch circuit check
1) Disconnect 2WD/4WD switch connector “L174” with
ignition switch turned OFF.
2) Check for proper connection to “L174-1” and “L174-5”
terminals of 2WD/4WD switch connector.
3) If connection is OK, measure voltage between “L174-1”
terminal or “L174-5” terminal of 2WD/4WD switch
connector and vehicle body ground.
Is it 10 – 14 V?Go to Step 3. Go to Step 5.
32WD/4WD switch ground circuit check
1) Measure resistance between “L174-4” terminal of 2WD/
4WD switch connector and vehicle body ground with
ignition switch turned OFF.
Is resistance below 5
Ω?Go to Step 4. “BLK/ORN” wire is
shorted to ground.
42WD/4WD switch check
1) Check 2WD/4WD switch referring to “2WD/4WD Switch
Inspection”.
Is it in good condition?Substitute a known-
good 4WD control
module and recheck.Replace 2WD/4WD
switch.
52WD/4WD switch circuit check
1) Disconnect connector from 4WD control module
connector “G26” with ignition switch turned OFF.
2) Check for shorted to ground in related circuits.
• Between “G26-13” terminal of 4WD control module
connector and “L174-1” terminal of 2WD/4WD switch
connector.
• Between “G26-14” terminal of 4WD control module
connector and “L174-5” terminal of 2WD/4WD switch
connector.
Are they in good condition?Substitute a known-
good 4WD control
module and recheck.Repair circuit.

Downloaded from www.Manualslib.com manuals search engine 4-ii Table of Contents
Specifications .......................................................4D-4
Tightening Torque Specifications ........................4D-4
ABS ............................................................4E-1
Precautions........................................................... 4E-1
Precautions in Diagnosing Troubles ................... 4E-1
Precautions in On-Vehicle Service...................... 4E-1
General Description ............................................. 4E-2
ABS Description .................................................. 4E-2
ABS Hydraulic Unit / Control Module
Assembly Description ....................................... 4E-3
CAN Communication System Description........... 4E-3
Schematic and Routing Diagram ........................ 4E-4
ABS Schematic ................................................... 4E-4
ABS Wiring Circuit Diagram ................................ 4E-5
Component Location ........................................... 4E-8
ABS Components Location ................................. 4E-8
Diagnostic Information and Procedures ............ 4E-8
ABS Check .......................................................... 4E-8
ABS Warning Light Check................................. 4E-10
EBD Warning Light (Brake Warning Light)
Check .............................................................. 4E-10
DTC Check........................................................ 4E-11
DTC Table ......................................................... 4E-11
DTC Clearance ................................................. 4E-11
Scan Tool Data ................................................. 4E-12
ABS Warning Light Does Not Come ON at
Ignition Switch ON .......................................... 4E-13
ABS Warning Light Comes ON Steady ............. 4E-15
EBD Warning Light (Brake Warning Light)
Comes ON Steady .......................................... 4E-16
Serial Data Link Circuit Check .......................... 4E-17
DTC C1013: Control Module Mismatch ............ 4E-20
DTC C1015: G Sensor Circuit (4WD Model)..... 4E-21
DTC 1016: Brake Light Switch .......................... 4E-22
DTC C1021 / C1022 / C1025 / C1026 / C1031
/ C1032 / C1035 / C1036: Wheel Speed
Sensor Circuit / Sensor or Encoder ................ 4E-23
DTC C1033: Wheel Speed Sensor Deviation ... 4E-25
DTC C1041 / C1042 / C1045 / C1046 / C1051
/ C1052 / C1055 / C1056: Inlet / Outlet
Solenoid .......................................................... 4E-26DTC C1057: Power Supply Voltage Too High
/ Too Low ........................................................ 4E-27
DTC C1061: Pump Motor Circuit ...................... 4E-28
DTC C1063: Solenoid Valve Power Supply
Driver Circuit ................................................... 4E-29
DTC C1071: Control Module Internal Defect .... 4E-30
ABS Hydraulic Unit / Control Module
Assembly Power and Ground Circuit Check ... 4E-30
Repair Instructions ............................................ 4E-31
ABS Hydraulic Unit Operation Check................ 4E-31
ABS Hydraulic Unit / Control Module
Assembly Components ................................... 4E-32
ABS Hydraulic Unit / Control Module
Assembly On-Vehicle Inspection .................... 4E-33
ABS Hydraulic Unit / Control Module
Assembly Removal and Installation ................ 4E-33
Front and Rear Wheel Speed Sensor On-
Vehicle Inspection ........................................... 4E-34
Front Wheel Speed Sensor Removal and
Installation ....................................................... 4E-35
Front and Rear Wheel Speed Sensor
Inspection ........................................................ 4E-36
Rear Wheel Speed Sensor Removal and
Installation (4WD Model) ................................. 4E-36
Rear Wheel Speed Sensor Removal and
Installation (2WD Model) ................................. 4E-36
Front Wheel Speed Sensor Encoder On-
Vehicle Inspection ........................................... 4E-37
Front Wheel Speed Sensor Encoder Removal
and Installation ................................................ 4E-37
Rear Wheel Speed Sensor Encoder On-
Vehicle Inspection ........................................... 4E-37
Rear Wheel Speed Sensor Encoder Removal
and Installation ................................................ 4E-37
G Sensor Removal and Installation (4WD
Model) ............................................................. 4E-38
G Sensor Inspection (4WD Model) ................... 4E-38
Specifications ..................................................... 4E-39
Tightening Torque Specifications ...................... 4E-39
Special Tools and Equipment ........................... 4E-39
Special Tool ...................................................... 4E-39