2001 SUZUKI GRAND VITARA ignition

5E2-14 ANTILOCK BRAKE SYSTEM (ABS)
System Circuit
1. Battery 11. ABS fail-safe transistor (Solenoid valve transistor) 21. To ECM and SDM (if equipped)
2. Main fuses 12. ABS pump motor transistor 22. Stop lamp
3. Ignition switch 13. Pump motor 23. Stop lamp switch
4. Circuit fuses 14. Solenoid valves 24. G sensor (For 4WD vehicle only)
5. Combination meter 15. Diagnosis monitor coupler 25. 4WD lamp (For 4WD vehicle only)
6. ABS warning lamp 16. Right-rear wheel speed sensor 26. ECM (PCM) (For 4WD vehicle only)
7. Brake warning lamp (“EBD” warning lamp) 17. Left-rear wheel speed sensor 27. 4WD switch (For 4WD vehicle only)
8. Warning lamp driver module (for ABS) 18. Right-front wheel speed sensor 28. ECM (PCM)
9. ABS hydraulic unit/control module assembly 19. Left-front wheel speed sensor
10. Terminal arrangement of connector E136 for
ABS hydraulic unit/control module assembly20. Data link connector
TERMINAL CIRCUIT TERMINAL CIRCUIT
E1361 Idle up signal
E13614 ABS warning lamp
2 Stop lamp switch 15 Left-front wheel speed sensor (+)
3 Right-front wheel speed sensor (+) 16 Left-front wheel speed sensor (–)
4 Right-front wheel speed sensor (–) 17 4WD switch
5–18 Ignition switch
6 Right-rear wheel speed sensor (–) 19 Left-rear wheel speed sensor (+)
7 Right-rear wheel speed sensor (+) 20 Left-rear wheel speed sensor (–)
8–21 Data link connector
9–22 Ground (for ABS pump motor)
10 Brake warning lamp (EBD warning lamp) 23 ABS pump motor relay
11 G sensor (For 4WD vehicle only) 24 Ground (for ABS control module)
12 Diagnosis switch terminal 25 ABS fail-safe relay
13 Ground (For G sensor) (For 4WD vehicle only)

ANTILOCK BRAKE SYSTEM (ABS) 5E2-15
Table-A ABS Warning Lamp Circuit Check – Lamp Does Not Come “ON” at
Ignition Switch ON
CIRCUIT DESCRIPTION
Operation (ON/OFF) of ABS warning lamp is controlled by ABS control module through lamp driver module in
combination meter.
If the Antilock brake system is in good condition, ABS control module turns ABS warning lamp 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 lamp is turned ON continuously by ABS control module. Also, it is turned ON continuously by lamp
driver module when the connector of ABS control module is disconnected.
INSPECTION
1. Main fuse 5. ABS warning lamp 9. Brake fluid level switch
2. Ignition switch 6. Brake warning lamp 10. ABS hydraulic unit/control module assembly
3. Circuit fuse 7. Lamp driver module 11. ABS hydraulic unit/control module connector
4. Combination meter 8. Parking brake switch
Step Action Yes No
1 1) Turn ignition switch ON.
Do other warning lamp come ON?Go to Step 2. Go to Step 4.
2 1) Disconnect ABS hydraulic unit/control mod-
ule connector.
Does ABS warning lamp light with ignition
switch ON?Substitute a known-good ABS
hydraulic unit/control module
assembly and recheck.Go to Step 3.
3 1) Remove combination meter.
Is bulb of ABS warning lamp in good condition?“BLU/ORN” circuit shorted to
ground. If OK, replace combina-
tion meter (lamp driver module).Replace bulb.
4 Is IG fuse in good condition? Open in “BLK/WHT” wire to
combination meter or poor con-
nection.Repair and replace.

5E2-16 ANTILOCK BRAKE SYSTEM (ABS)
Table-B ABS Warning Lamp Circuit Check – Lamp Comes “ON” Steady
Refer to TABLE – A for System Circuit Diagram and Circuit Description.
INSPECTION
Step Action Yes No
1 Perform 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.
2 Does malfunction DTC (other than code No.12)
exist at Step 1?Go to Step 7 of “ABS
DIAGNOSTIC FLOW
TABLE” in this section.Go to Step 3.
3 1) Disconnect ABS hydraulic unit/control mod-
ule connector.
2) Check for proper connection to ABS
hydraulic unit/control module connector at
terminals “E136-14”, “E136-18” and “E136-
24”.
3) If OK then ignition switch ON and measure
voltage at terminal “E136-18” of connector.
Is it 10 – 14 V?Go to Step 4.“BLK/WHT” circuit open.
4 1) With ABS hydraulic unit/control module con-
nector disconnected, turn ignition switch ON
and light ABS warning lamp.
2) Connect terminal “E136-14” of discon-
nected connector to ground using service
wire.
Does ABS warning lamp turn off?Go to Step 5.“BLU/ORN” circuit open.
If wire and connection are
OK, replace combination
meter (lamp driver mod-
ule).
5 1) Measure resistance from connector terminal
“E136-24” to body ground.
Is continuity indicated?Substitute a known-good
ABS hydraulic unit/con-
trol module assembly and
recheck.“BLK” circuit open.

ANTILOCK BRAKE SYSTEM (ABS) 5E2-17
Table-C ABS Warning Lamp Circuit Check – The Lamp Flashes Continuously
While Ignition Switch Is ON
CIRCUIT DESCRIPTION
When diagnosis switch terminal is shorted or connected to the ground with ignition switch ON, diagnosis trouble
code (DTC) is indicated by flashing of ABS warning lamp only in the 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
1. ABS warning lamp in combination meter 3. Diagnosis monitor coupler 3-2. Diagnosis ground terminal
2. ABS hydraulic unit/control module assembly 3-1. Diagnosis switch terminal 4. ABS hydraulic unit/control module connector
Step Action Yes No
1 Is diagnosis switch terminal connected to
ground via service wire?Go to Step 3. Go to Step 2.
2 1) Ignition switch ON.
2) Measure voltage between diagnosis switch
terminal and ground.
Is it 10 – 14 V?Substitute a known-good
ABS hydraulic unit/con-
trol module assembly and
recheck.“PNK” wire circuit shorted
to ground.
3 1) Ignition switch ON.
2) Does flashing of ABS warning lamp indicate
DTC?Go to Step 7 of “ABS
DIAGNOSTIC FLOW
TABLE” in this section.Substitute a known-good
ABS hydraulic unit/con-
trol module assembly and
recheck.

5E2-18 ANTILOCK BRAKE SYSTEM (ABS)
Table-D Code (DTC) Is Not Outputted Even with Diagnosis Switch Terminal
Connected to Ground
CIRCUIT DESCRIPTION
When diagnosis switch terminal is connected to ground with ignition switch turned ON, the ABS control module
outputs diagnostic trouble code by flashing ABS warning lamp.
INSPECTION
1. ABS warning lamp in combination meter 3. Diagnosis monitor coupler 3-2. Diagnosis ground terminal
2. ABS hydraulic unit/control module assembly 3-1. Diagnosis switch terminal 4. ABS hydraulic unit/control module connector
Step Action Yes No
1 Is it shorted diagnosis switch terminal and
ground terminal by service wire properly?Go to Step 2. Connect service wire
securely.
2 1) Disconnect service wire.
2) Disconnect ABS hydraulic unit/control mod-
ule connector.
3) Measure resistance between diagnosis
switch terminal and connector terminal
“E136-12”.
Is it infinite (∞)?“PNK” circuit open. Go to Step 3.
3 1) Measure resistance between ground termi-
nal of monitor coupler and body ground.
Is continuity indicated?Go to Step 4.“BLK” circuit open or poor
connection.
4 1) Check for proper connection to ABS
hydraulic unit/control module at terminal
“E136-12”.
2) If OK, then check ABS warning lamp circuit
referring to TABLE A, B and C.
Is it in good condition?Substitute a known-good
ABS hydraulic with/control
module assembly and
recheck.Repair “ABS” warning
lamp circuit.

5E2-20 ANTILOCK BRAKE SYSTEM (ABS)
DTC C1015 (DTC 15) – G Sensor Circuit and 4WD Lamp Circuit
DESCRIPTION
G sensor
While a vehicle is at stop or running, if the potential difference between the sensor signal terminal “E136-11” and
the sensor ground terminal “E136-13” 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.
When G sensor is installed to 2WD vehicle, this DTC is set.
4WD lamp
When 4WD lamp circuit open or shorted, this DTC is set.
1. Ignition switch 3. ABS hydraulic unit/control module assembly 5. 4WD lamp 7. 4WD switch
2. G sensor 4. ABS hydraulic unit/control module connector 6. ECM (PCM)

ANTILOCK BRAKE SYSTEM (ABS) 5E2-21
INSPECTION
Step Action Yes No
1 1) Turn ignition switch ON.
Does 4WD lamp turn ON when 4WD switch
turns ON?Go to Step 2. Replace bulb or repair its
circuit.
2 1) Ignition switch OFF.
2) Check for proper connection to ECM (PCM)
and 4WD switch.
3) If OK, then check 4WD control system refer-
ring to DIAGNOSIS in SECTION 7E.
Is it good condition?Go to Step 3. Repair 4WD control sys-
tem.
3 1) Ignition switch OFF.
2) Disconnect connector from ABS hydraulic
with/control module assembly.
3) Check for proper connection to ABS control
module at terminal “E136-17”
4) If OK, then turn ignition switch ON and 4WD
switch ON.
5) Measure voltage between terminal “E136-
17” of module connector and body ground.
Is it 10 – 14 V?Go to Step 4.“ORN/BLK” circuit open or
short to ground.
4 Is G sensor installed to 2WD vehicle? Remove G sensor. Go to Step 5.
5 Is G sensor installed floor securely? Go to Step 6. Tighten sensor or bracket
screw securely. If not,
using new screw.
6 1) 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
INSPECTION of “G SENSOR”.
Is it in good condition?Go to Step 7. Replace G sensor.
7 1) Disconnect connectors from ABS hydraulic
unit/control module assembly and G sensor.
2) Check for proper connection to ABS control
module at terminals “E136-11” and “E136-
13”.
3) If OK, then turn ignition switch ON and mea-
sure voltage between “BLK/WHT” terminal
of sensor connector and body ground.
Is it 10 – 14 V?Go to Step 8.“BLK/WHT circuit open.
8 Measure voltage between “ORN/WHT” terminal
of sensor connector and body ground.
Is it 0 V?Go to Step 9.“ORN/WHT” circuit
shorted to power circuit.
9 1) Ignition switch OFF.
2) Check that “ORN/WHT” circuit is free from
open or short to ground and “ORN/GRN”
circuit.
Is it in good condition?“ORN/GRN” circuit open.
If circuit is OK, substitute
a known-good ABS
hydraulic unit/control
module assembly.“ORN/WHT” circuit open
or shorted to ground or
“ORN/GRN” circuit.

5E2-22 ANTILOCK BRAKE SYSTEM (ABS)
DTC C1021 (DTC 21), DTC C1022 (DTC 22) – Right-Front Wheel Speed Sensor
Circuit or Sensor Ring
DTC C1025 (DTC 25), DTC C1026 (DTC 26) – Left-Front Wheel Speed Sensor
Circuit or Sensor Ring
DTC C1031 (DTC 31), DTC C1032 (DTC 32) – Right-Rear Wheel Speed Sensor
Circuit or Sensor Ring
DTC C1035 (DTC 35), DTC C1036 (DTC 36) – Left-Rear Wheel Speed Sensor
Circuit or Sensor Ring
DESCRIPTION
The ABS control module monitors the voltage at the terminal of each sensor while the ignition switch is ON.
When the voltage is not within the specified range, an applicable DTC will be set. Also, when no sensor signal is
inputted at starting or while running, an applicable DTC will be set.
1. Ignition switch 4. Right-front wheel speed sensor 7. ABS hydraulic unit/control module connector
2. ABS control module/hydraulic unit assembly 5. Left-rear wheel speed sensor
3. Left-front wheel speed sensor 6. Right-rear wheel speed sensor
NOTE:
When the vehicle was operated in any of the following ways, one of these DTCs may be set even when
the sensor is in good condition. If such possibility is suspected, repair the trouble (dragging of brake,
etc.) of the vehicle, clear DTC once and then after performing the driving test as described in Step 2 of
“ABS DIAGNOSIS FLOW TABLE”, check whether or not any abnormality exists.
The vehicle was driven with parking brake pulled.
The vehicle was driven with brake dragging.
Wheel spin occurred while driving.
Wheel(s) was turned while the vehicle was jacked up.
The vehicle was stuck.