Suzuki Grand Vitara JB416 / JB420 (ESP model). Manual — part 68

4F-26 Electronic Stability Program:

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

1. Battery

5. Stop lamp

2. Main fuse box

6. ECM

DTC Detecting Condition

Trouble Area

Vehicle behavior and stop lamp switch signal is disagreed
for specified time.

• Back up light switch circuit
• Back up light switch
• ECM
• ESP

® control module

Step

Action

Yes

No

1

Was “Electronic Stability Program Check” performed?

Go to Step 2.

Go to “Electronic
Stability Program
Check”.

2

DTC check for ESP

®

1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Turn ignition switch ON and check DTC for ESP

®.

Is DTC U1073 and/or U1100 detected?

Go to applicable DTC
diag. flow.

Go to Step 3.

3

Check stop lamp switch
1) Check stop lamp (brake pedal) switch referring to “Stop

(Brake) Lamp Switch Inspection in Section 9B in related
manual”.

Is it in good condition?

Go to Step 4.

Replace stop lamp
switch.

4

Check stop lamp switch circuit
1) Disconnect connector from stop lamp switch connector

with ignition switch turned OFF.

2) Check for proper connection to switch connector.
3) If connection are OK, measure voltage between “GRN”

wire terminal of stop lamp switch connector and vehicle
body ground.

Is it 10 – 14 V?

Go to Step 5.

Replace fuse and/or
repair “GRN” wire
circuit.

5

Check stop lamp switch circuit
1) Disconnect connectors from ECM.
2) Check for proper connection to “E23-20” wire of ECM

connector.

3) If connections are OK, check stop lamp switch circuit for

the following.
• Resistance of “GRN/WHT” wire terminal of stop lamp

switch between stop lamp switch connector and ECM
connector is less than 1

Ω (continuity check)

• Resistance between “GRN/WHT” wire terminal of stop

lamp switch connector and vehicle body ground is
infinity (ground short check)

• Voltage of between “GRN/WHT” wire terminal of stop

switch connector and vehicle body ground is 0 V with
ignition switch tuned ON (power short check)

Is it in good condition?

Substitute a known-
good ECM and recheck.
If DTC C1016 is still
detected, substitute a
known-good ESP

®

hydraulic unit / control
module assembly and
recheck.

Repair or replace
defective wire.

Electronic Stability Program: 4F-27

DTC C1018: Brake Fluid Level Switch Failure

S5JB0E4604027

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

[A]

E53

16

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

RED/BLK

E53-13
E53-44

RED

WHT

RED

WHT

12V

1

2

3

4

5

6

2

G31-1
G31-3

G31-7

G31

1

2

3

4

7

8

9

10

11

14

15

16
36

34

35

24 23

21

22

28 27

25

26

37

39 38

40

18 17

13 12

19

20

[B]

I6JB01460017-02

[A]: ESP

® control module connector (viewed from terminal side)

2. CAN driver

5. Brake fluid level switch

[B]: BCM connector (viewed from harness side)

3. Junction connector

6. ESP

® hydraulic unit control module assembly

1. BCM

4. To TCM, 4WD control module, keyless

start control module, combination
meter and steering angle sensor

DTC Detecting Condition

Trouble Area

• Brake fluid level is too low.
• Input voltage of brake fluid level switch to BCM is low.

• Brake fluid level
• Brake fluid level switch circuit
• Brake fluid level switch
• BCM
• ESP

® control module

Step

Action

Yes

No

1

Was “Electronic Stability Program Check” performed?

Go to Step 2.

Go to “Electronic
Stability Program
Check”.

2

Check brake fluid level
1) Check brake fluid level in reservoir.

Is brake fluid level upper than the minimum level?

Go to Step 3.

Replenish brake fluid to
reservoir.

3

DTC check for ESP

®

1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Turn ignition switch ON and check DTC for ESP

®.

Is DTC U1073 and/or U1140 detected?

Go to applicable DTC
diag. flow.

Go to Step 3.

4

Check brake fluid level switch
1) Turn ignition switch to OFF position.
2) Disconnect brake fluid level switch connector.
3) Check for proper connection at each terminal of brake

fluid level switch connector.

4) If OK, then check brake fluid level switch referring to

“Brake Fluid Level Switch Inspection in Section 9C in
related manual”.

Is check result OK?

Go to Step 5.

Replace brake fluid
level switch.

4F-28 Electronic Stability Program:

DTC 1020: Master Cylinder Pressure Sensor Power Supply Failure

S5JB0E4604028

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

1) Turn ignition switch to OFF position.
2) Check for proper connection from harness to ESP

® control module.

3) If OK, substitute an ESP

® hydraulic unit / control module assembly with correct part number.

4) Recheck system.

DTC C1021, C1022 / C1025, C1026 / C1031, C1032 / C1035, C1036: Right-Front / Left-Front / Right-
Rear / Left-Rear Wheel Speed Sensor Circuit or Encoder Failure

S5JB0E4604014

Refer to “DTC C1021, C1022 / C1025, C1026 / C1031, C1032 / C1035, C1036: Right-Front / Left-Front / Right-Rear /
Left-Rear Wheel Speed Sensor Circuit or Encoder Failure in Section 4E”.

5

Check brake fluid level switch circuit
1) Disconnect BCM connector.
2) Check for proper connection to BCM connector at “G31-

7” terminal.

3) If OK, then check resistance between “G31-7” terminal

and vehicle body ground.

Is resistance infinity?

Go to Step 6.

“BLKL/RED” wire circuit
is shorted to ground.

6

Check BCM
1) Connect brake fluid level switch connector and BCM

connector.

2) Check voltage at “G31-7” terminal of BCM referring to

“Inspection of BCM and its Circuits in Section 10B in
related manual”.

Is voltage in good condition?

Substitute a known-
good ESP

® hydraulic

unit / control module
assembly and recheck.

Check BCM power and
ground circuit. If circuit
is OK, substitute a
known-good BCM and
recheck.

Step

Action

Yes

No

DTC Detecting Condition

Trouble Area

Power supply voltage to master cylinder pressure sensor
in ESP

® hydraulic unit / control module assembly is too

low.

• ESP

® control module

Electronic Stability Program: 4F-29

DTC C1024: Steering Angle Sensor Circuit Failure

S5JB0E4604029

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

DTC C1027: ESP

® OFF Switch Circuit Failure

S5JB0E4604030

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Detecting Condition

Trouble Area

• Steering angle sensor internal defect is detected by

CPU in steering angle sensor.

• Steering angle sensor signal is out of specified range.

• Steering angle sensor
• ESP

® control module

Step

Action

Yes

No

1

Was “Electronic Stability Program Check” performed?

Go to Step 2.

Go to “Electronic
Stability Program
Check”.

2

DTC check for ESP

®

1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Turn ignition switch ON and check DTC for ESP

®.

Are DTC C1037, U1073 and/or U1126 detected?

Go to applicable DTC
diag. flow.

Go to Step 3.

3

Check sensor calibration
1) Calibrate steering angle sensor referring to “Sensor

Calibration”.

2) Clear all DTC(s) and check DTC for ESP

®.

Is DTC C1024 still detected?

Go to Step 4.

Steering angle sensor
calibration was
incompleted.

4

Check steering angle sensor
1) Check steering angle sensor referring to “Steering Angle

Sensor On-Vehicle Inspection”.

Is it good condition?

Substitute a known-
good ESP

® hydraulic

unit / control module
assembly and recheck.

Replace steering angle
sensor.

[A]

E53

16

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

BLU/WHT

BLK

12V

E53-7

1

2

I6JB01460018-01

[A]: ESP

® control module connector (viewed from terminal side)

1. ESP

® OFF Switch

2. ESP

® hydraulic unit control module assembly

DTC Detecting Condition

Trouble Area

Mechanical switch failure, failure in switch wiring is
shorted to ground.

• ESP

® OFF switch

• ESP

® OFF switch circuit

• ESP

® control module