2002 SUZUKI GRAND VITARA Assembly

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-15
1. Battery
2. Main fuses
3. Ignition switch
4. Circuit fuses
5. ABS hydraulic unit / control module
5-1. Terminal arrangement for ABS hydraulic unit /
control module assembly
5-2. ABS fail-safe relay (Solenoid valve relay)
5-3. ABS pump motor relay
5-4. Pump motor
5-5. Solenoid valves
6. ªABSº warning lamp
7. Right-rear wheel speed sensor
8. Left-rear wheel speed sensor
9. Right-front wheel speed sensor
10. Left-front wheel speed sensor
11. Data link connector
12. Diagnosis connector
13. Stop lamp
14. Stop lamp switch
15. PCM (ECM+TCM) or ECM
16. G sensor (For 4WD model only)
17. 4WD switch (For 4WD model only)
18. 4WD indicator lamp (For 4WD model only)
19. 4WD controller (If equipped)
20. EBD warning lamp (Brake warning lamp)
21. Combination meter
22. Parking brake switch
23. Brake fluid lever switch
24. Warning lamp driver moduleWire colorB : Black
B / Bl : Black / Blue
B / O : Black / Orange
B / W : Black / White
Bl : Blue
Bl /B : Blue / Black
Bl / O : Blue / Orange
Br : Brown
G : Green
G / B : Green / Black
G / W : Green / White
Lg : Lightgreen
Lg / B : Lightgreen / Black
O / B : Orange / Black
O / G : Orange / Green
O / W : Orange / White
P : Pink
P / B : Pink / Black
V / G : Violet / Green
W / BI : White / Blue
W / G : White / Green
W / Y : White / Yellow
Y : Yellow
Y / B : Yellow / Black
SYSTEM CIRCUIT
TERMINALCIRCUIT
A1Right-rear wheel speed sensor (+)
A2Right-front wheel speed sensor (±)
A3Right-front wheel speed sensor (+)
A4G sensor ground (For 4WD model only)
A5ÐÐÐ
A6ÐÐÐ
A7Idle up signal
A8Diagnosis switch terminal
A9Stop lamp switch
A10Ground (For ABS control module)
A11ABS fail-safe relay
A12Right-rear wheel speed sensor (±)
A13Left-front wheel speed sensor (±)
A14G sensor signal (For 4WD model only)
A15ÐÐÐ
A16ÐÐÐ
A17ªABSº warning lamp
A18Left-rear wheel speed sensor (+)
A19Left-rear wheel speed sensor (±)
A20Left-front wheel speed sensor (+)
A21ÐÐÐ
A22Data link connector
A23ÐÐÐ
A244WD switch (For 4WD model only)
A25Ignition switch
A26ªEBDº warning lamp
A27ABS pump motor relay
A28Ground (For ABS pump motor)

YH4
GRAND
VITARA
5E1-16 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
-1. Main fuse
-2. Ignition switch
-3. Circuit fuse for IG
-4. ªABSº warning lamp
-5. ABS hydraulic unit / control
module assembly
5-1. Fail-safe relay
5-2. To solenoid valves and
pump motor relay
(ABS hydraulic unit)
-6. Diagnosis connector
(Black connector)
6-1. Diag. switch terminal
6-2. Diag. ground terminal
-7. Combination meter
7-1. ABS lamp driver module
-8. ABS hydraulic unit/
control module connector
of harness
-9. EBD warning lamp
(Brake warning lamp)
-10. Parking brake switch
-11. Brake fluid level switch
TABLE ± A ªABSº WARNING LAMP CIRCUIT CHECK ± LAMP DOES NOT
COME ªONº AT IGNITION SWITCH ON
CIRCUIT DESCRIPTION
Operation (ON / OFF) of the ªABSº warning lamp is controlled by the ABS control module and ABS lamp driver mod-
ule.
If the Antilock brake system is in good condition, the ABS control module turns the ªABSº warning lamp ON at the
ignition switch ON, keeps it ON for 2 seconds only and then turns it OFF. If an abnormality in the system is detected,
the lamp is turned ON by ABS control module. Also, it is turned ON by ABS lamp driver module when the connector
of the ABS control module was disconnected.
INSPECTION
STEPACTIONYESNO
11) Turn ignition switch ON.
Do other warning lamp come ON?Go to step 2.Go to step 4.
21) Disconnect ABS hydraulic unit / control module
connector.
Does ABS warning lamp light with ignition switch ON?Replace ABS
hydraulic unit / control
module assembly.Go to step 3.
31) Remove combination meter.
Is bulb of ABS warning lamp in good condition?ªBl / Oº circuit shorted
to ground. If OK,
replace ABS
warning circuit (lamp
driver module).Replace bulb.
4Is IG fuse in good condition?Open in ªB / Wº wire to
combination meter or
poor connection.Repair and
replace.

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-17
1. ABS hydraulic
unit / control
module connector
TABLE ± B ªABSº WARNING LAMP CIRCUIT CHECK ± LAMP COMES ªONº
STEADY
Refer to TABLE ± A for System Circuit Diagram and Circuit Description.
INSPECTION
STEPACTIONYESNO
1Perform diagnostic trouble code check. Is there any DTC
(including code No.12, NO CODES on SUZUKI scan
tool) exists?Go to step 2.Go to step 3.
2Is malfunction DTC (other than code No.12) exists at step
1?Go to step 7 of ABS
diagnostic flow table
in this section.Go to step 3.
31) Disconnect ABS hydraulic unit / control module
connector. (See Fig. 1)
2) Check for proper connection to ABS hydraulic
unit / control module connector at terminals ªA17º,
ªA25º and ªA10º.
3) If OK, turn ignition switch ªONº and measure
voltage at terminal ªA25º of connector.
Is it 10 ± 14 V?Go to step 4.ªB / Wº circuit open.
41) With ABS control module connector disconnected,
turn ignition switch ON and light ABS warning lamp.
2) Connect terminal ªA17º of disconnected connector to
ground using service wire.
Does ªABS warning lampº turn off?Go to step 5.ªBl / Oº circuit open.
If wire and
connection are OK,
replace ABS lamp
driver module.
51) Measure resistance from connector terminal ªA10º
to body ground.
Is continuity indicated?Substitute a
known-good ABS
hydraulic unit /
control module
assembly and
recheck.ªBº circuit open.
Fig. 1

YH4
GRAND
VITARA
5E1-18 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
-1. ªABSº warning lamp
-2. ABS hydraulic unit /
control module assembly
-3. Diagnosis connector
3-1. Diag. switch terminal
3-2. Diag. ground terminal
TABLE ± C ªABSº WARNING LAMP CIRCUIT CHECK ± THE LAMP FLASHES
CONTINUOUSLY WHILE IGNITION SWITCH IS ON
CIRCUIT DESCRIPTION
When the diag. switch terminal is shorted or connected to the ground with the ignition switch ON, the diag. trouble
code (DTC) is indicated by flashing of the ªABSº warning lamp only in following cases.

Normal DTC (12) is indicated if no malfunction DTC is detected in the ABS.

A history malfunction DTC is indicated by flashing of the lamp if a current malfunction DTC is not detected at that
point although a history malfunction DTC is stored in memory.
INSPECTION
STEPACTIONYESNO
1Is diag. switch terminal connected to ground via
service wire?Go to step 3.Go to step 2.
21) Ignition switch ON.
2) Measure voltage between diag. switch terminal
and ground.
Is it 10 ± 14 V?Substitute a
known-good ABS
hydraulic unit /
control module
assembly and
recheck.ªPº wire circuit
shorted to
ground.
31) Ignition switch ON.
2) Does flashing of ªABSº warning lamp indicate
DTC (DTC 12 or history DTC)?Go to step 7 of ABS
diagnostic flow
table in this
section.Substitute a
known-good ABS
hydraulic unit /
control module
assembly and
recheck.

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-19
-1. ªABSº warning lamp
-2. ABS hydraulic unit / control
module assembly
-3. Diagnosis connector
3-1. Diag. switch terminal
3-2. Diag. ground terminal
-4. ABS hydraulic unit/
control module connector
of harness
1. ABS hydraulic
unit / control
module connector
TABLE ± D CODE (DTC) IS NOT OUTPUTTED EVEN WITH DIAG. SWITCH
TERMINAL CONNECTED TO GROUND
CIRCUIT DESCRIPTION
When the diag. switch terminal is connected to the ground with the ignition switch turned ON, the ABS control mod-
ule outputs a diagnostic trouble code by flashing ªABSº warning lamp.
INSPECTION
STEPACTIONYESNO
1Is it shorted diag. switch terminal and ground terminal by
service wire properly?Go to step 2.Connect service
wire securely.
21) Disconnect service wire.
2) Disconnect ABS hydraulic unit / control module
connector. (See Fig. 1)
3) Measure resistance between diag. switch terminal
and connector terminal ªA8º.
Is it infinite (
)?ªPº circuit open.Go to step 3.
31) Measure resistance between ground terminal of
monitor connector and body ground.
Is continuity indicated?Go to step 4.ªBº circuit open or
poor connection.
41) Check for proper connection to ABS hydraulic
unit / control module at terminal ªA8º and ªA10º.
2) If OK, then check ªABSº warning lamp circuit
referring to ªTABLE A, B and Cº.
Is it in good condition?Substitute a
known-good ABS
hydraulic unit /
control module
assembly and
recheck.Repair ªABSº
warning lamp
circuit.
Fig. 1

YH4
GRAND
VITARA
5E1-20 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
TABLE ± E EBD WARNING LAMP (BRAKE WARNING LAMP) CHECK-LAMP
COMES ªONº STEADY
CIRCUIT DESCRIPTION
EBD warning lamp (brake warning lamp) is controlled by parking brake switch, brake fluid level switch and ABS
control module / hydraulic unit assembly through lamp driver module in combination meter. Refer to ªTABLE-Aº for
circuit diagram.
STEP
ACTIONYESNO
11) Make sure that:

Parking brake is completely released.Go to step 2.Release parking
brake completely

Brake fluid level is upper than the minimum level.
Are the check results OK?and / or replenish
brake fluid.
2Does ªABSº warning lamp come on?Perform ªTABLE Bº
previously
outlined.Go to step 3.
31) Disconnect ABS hydraulic unit / control module
connector.
2) Check for proper connection to ABS hydraulic unit /
control module connector at terminals ªA26º.
3) If OK, apply chocks to wheels and select gear in neutral
position (P range for A / T).
4) Keep brake pedal depressed and start engine.
Release parking brake.
5) Connect terminal ªA26º of disconnected connector to
ground using service wire.
Does EBD warning lamp (brake warning lamp) turn off?Substitute a
known-good ABS
hydraulic unit /
control module
assembly and
recheck.ªBrº circuit open.
If wire and
connection are
OK, replace
combination
meter.

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-21
1. Ignition switch
2. G sensor
3. ABS hydraulic unit control
module assembly
4. ABS hydraulic unit/
control module
connector of harness
O/G
DTC 15 (DTC C1015) ± G SENSOR CIRCUIT (FOR 4WD MODEL ONLY)
DESCRIPTION
While a vehicle is at stop or running, if the potential difference between the sensor signal terminal ªA14º and the
sensor ground terminal ªA4º is not within the specified voltage value, or if the signal voltage while at a stop does
not vary from that while running, this DTC is set.
Therefore, this DTC may be set when a vehicle is lifted up and its wheel(s) is turned. In such case, clear the DTC
and check again.

YH4
GRAND
VITARA
5E1-22 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
1. ABS hydraulic
unit / control
module connector
INSPECTION
STEPACTIONYESNO
1Is G sensor installed floor securely?Go to step 2.Tighten sensor or
bracket screw
securely. If not,
using new screw.
21) Ignition switch OFF.
2) Remove G sensor with bracket.
3) Check for proper connection to G sensor.
4) If OK then check G sensor referring to item
INSPECTION of G sensor.
Is it in good condition?Go to step 3.Replace G sensor.
31) Disconnect connectors from ABS hydraulic unit /
control module assembly (See Fig. 1) and G sensor.
2) Check for proper connection to ABS control module
at terminals ªA14º and ªA4º.
3) If OK, then turn ignition switch ON and measure
voltage between ªB / Wº terminal of sensor
connector and body ground.
Is it 10 ± 14 V?Go to step 4.ªB / Wº circuit open.
4Measure voltage between ªO / Wº terminal of sensor
connector and body ground.
Is it 0 V?Go to step 5.ªO / Wº circuit
shorted to power
circuit.
51) Ignition switch OFF.
2) Check that ªO / Wº circuit is free from open
or short to ground and ªO / Gº circuit.
Is it in good condition? (See Fig. 2)ªO / Gº circuit open.
If circuit is OK, substi-
tute a known-good
ABS hydraulic
unit / control module
assembly.ªO / Wº circuit open
or shorted to
ground or ªO / Gº
circuit.
Fig. 1 Fig. 2