Suzuki Grand Vitara JB419. Service manual - part 98

Electronic Stability Program:  4F-25

DTC C1015 / C1017 / C1023: Longitudinal G Sensor / Lateral G Sensor / Yaw Rate Sensor in Yaw Rate 
/ G Sensor Assembly Failure

S5JB0B4604058

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

DTC Detecting Condition

Trouble Area

C1015:
Longitudinal G sensor signal is out of specified range. (for 
4WD vehicle)
C1017:
Lateral G sensor signal is out of specified range.
C1023:
• Yaw rate sensor signal is out of range.
• Vehicle behavior and yaw rate signal is disagreed.

• Yaw rate / G sensor assembly
• 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 C1034 and/or C1073 detected?

Go to applicable DTC 
diag. flow.

Go to Step 3.

3

Check sensor calibration
1) Calibrate yaw rate / G sensor assembly referring to 

“Sensor Calibration”.

2) Clear all DTCs and check DTC for ESP

®.

Are DTC C1015, C1017 and/or C1023 still detected?

Go to Step 4.

Yaw rate / G sensor 
assembly calibration is 
incompleted.

4

Check yaw rate / G sensor assembly
1) Check yaw rate / G sensor assembly referring to “Yaw 

Rate / G Sensor Assembly On-Vehicle Inspection”.

Is it good condition?

Substitute a known-
good ESP

® hydraulic 

unit / control module 
assembly and recheck.

Replace yaw rate / G 
sensor assembly.

4F-26 Electronic Stability Program: 

DTC C1016: Stop Lamp Switch Circuit Failure

S5JB0B4604059

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

3

2

1

[A]

GRN

WHT

E53-42
E53-46

6

7

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

WHT/RED

WHT/BLU

GRN/WHT

4

5

7

8

E66-32

E66-29

E66-26

[B]

1

3

7

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

4

6

8

9

10

11

12

13

14

5

E66

I5JB0B460005-01

[A]: ESP

® control module connector (viewed from 

terminal side)

3. Junction block assembly

7. CAN driver

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

4. Stop lamp switch

8. ESP

® hydraulic unit control module assembly

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 U1100 detected?

Go to “DTC U1100: Lost 
Communication with 
ECM (Reception Error)”.

Go to Step 3.

3

DTC check for ECM
1) Check DTC for ECM.

Is DTC P0571 detected?

Go to “DTC P0571: 
Brake Switch “A” Circuit 
Malfunction in Section 
1A”.

Substitute a known-
good ESP

® hydraulic 

unit / control module 
assembly and recheck.

Electronic Stability Program:  4F-27

DTC C1018: Brake Fluid Level Switch Failure

S5JB0B4604060

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]

I5JB0B460006-01

[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 4WD control module, immobilizer 

control module (ICM), 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 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 U1140 detected?

Go to “DTC U1140: Lost 
Communication with 
BCM (Reception Error)”.

Go to Step 3.

4F-28 Electronic Stability Program: 

DTC C1020: Master Cylinder Pressure Sensor Power Supply Failure

S5JB0B4604061

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.

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.

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 
short 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