Suzuki Grand Vitara JB627. Manual - part 199

4F-35 Electronic Stability Program: 

DTC Troubleshooting

DTC C1090: ECM Detect Rolling Counter Failure from ESP

® Control Module

S6JB0B4604040

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

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 there any DTC(s) other than C1075, C1076, C1077 and 
C1078?

Go to applicable DTC 
diagnosis flow for 
troubleshooting.

Go to Step 3.

3

Check sensor calibration
1) Calibrate all sensors referring to “Sensor Calibration”.
2) Clear all DTC(s) and check DTC for ESP

®.

Is DTC C1075, C1076, C1077 and/or C1078 still detected?

DTC C1075: Replace 
steering angle sensor.
DTC C1076: Replace 
ESP

® hydraulic unit / 

control module 
assembly.
DTC C1077 / 1078: 
Replace yaw rate / G 
sensor assembly.

Calibration was 
incompleted.

DTC Detecting Condition

Trouble Area

ESP

® control module rolling counter failure is detected by 

ECM.

• CAN communication circuit
• 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 there any DTC(s) other than C1038 and C1090?

Go to applicable DTC 
diagnosis flow for 
troubleshooting.

Go to Step 3.

3

DTC check for ECM
1) Check DTC for ECM.

Is DTC U0073 and/or DTC U0121 detected?

Go to applicable DTC 
diagnosis flow for 
troubleshooting.

Substitute a known-
good ESP

® hydraulic 

unit / control module 
assembly and check 
DTC.

Electronic Stability Program:  4F-36

DTC C1091 / 1092 / 1093: ECM / TCM / 4WD Control Module Data in CAN Line Failure

S6JB0B4604041

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

DTC U1073: Control Module Communication Bus Off

S6JB0B4604020

Refer to “DTC U1073: Control Module Communication Bus Off in Section 4E”.

DTC U1100: Lost Communication with ECM (Reception Error)

S6JB0B4604021

Refer to “DTC U1100: Lost Communication with ECM (Reception Error) in Section 4E”.

DTC Detecting Condition

Trouble Area

C1091:
ECM sent invalid signal to ESP

® control module.

• Engine control system
• ECM
• ESP

® control module

C1092:
TCM sent invalid signal to ESP

® control module. (A/T 

model)

• A/T system
• TCM
• ESP

® control module

C1093:
4WD control module sent invalid signal to ESP

® control 

module. (if equipped 4WD control module)

• 4WD control system
• 4WD control module
• 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 other control module than ESP

®

1) Check DTC for ECM, TCM and/or 4WD control module.

Is there any DTC(s)?

Go to applicable DTC 
diagnosis flow for 
troubleshooting.

Substitute a known-
good ESP

® hydraulic 

unit / control module 
assembly and check 
DTC.

4F-37 Electronic Stability Program: 

DTC U1101: Lost Communication with TCM (Reception Error)

S6JB0B4604042

Wiring Diagram

DTC Detecting Condition and Trouble Area

WHT

RED

WHT

RED

WHT/BLU

WHT

RED

WHT

RED

E91-22 

E91-23

E53-13

E53-44

E53-46

WHT/BLU

WHT/RED

E23-17

E23-9

G31-1

G31-3

G44-19

G44-18

WHT

RED

WHT

RED

E92-17

E92-7

[F]

G44

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32 31 30 29

24 23

37

18

19

20

[C]

6

5

16 15 14 13 12 11

4 3

24 23

21

22

10 9

8

7

2

1

19

20

18 17

E92

[G]

1

2

3

4

5

6

7

8

9

10

11

17

1615141312

2221201918

G28

[D]

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

E91

1

2

3

10

11

12

16

17

18

15 14 13

19

20

21

25

26

5

6

[E]

G28-8

G28-10

G45-9

G45-10

WHT/RED

E53-42

WHT

RED

WHT

RED

[B]

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

33

34

35

36

37

38

39

40

32

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

E23

[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

[H]

G45

10 9

3 2 1

1

2

3

4

9

5

7

6

8

G31-2

G31-4

10

I6JB01460023-02

[A]: ESP

® control module connector (viewed from 

terminal side)

[G]: Combination meter connector (viewed 

from harness side)

5. 4WD control module (if equipped)

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

[H]: Steering angle sensor connector 

(viewed from harness side)

6. Keyless start control module (if equipped)

[C]: TCM connector (viewed from harness side)

1. ESP

® hydraulic unit / control module 

assembly

7. Combination meter

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

2. ECM

8. Steering angle sensor (if equipped)

[E]: 4WD control module connector (viewed from 

harness side)

3. TCM

9. Junction connector

[F]: Keyless start control module connector (viewed 

from harness side)

4. BCM

10. Data link connector (DLC)

DTC Detecting Condition

Trouble Area

TCM message data is missing from CAN communication. 
(A/T model)

• CAN communication circuit
• TCM
• ESP

® control module

Electronic Stability Program:  4F-38

DTC Troubleshooting

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) Check DTC for ESP

®.

Is DTC U1101 and DTC U1073 detected together?

Go to “DTC U1073: 
Control Module 
Communication Bus Off 
in Section 4E” for 
troubleshooting.

Go to Step 3.

3

DTC check for TCM
1) Check DTC for TCM.

Is DTC U0073 detected?

Go to “DTC U0073: 
Control Module 
Communication Bus Off 
in Section 5A” for 
troubleshooting.

Go to Step 4.

4

Check each control module connectors
1) Check connection of connectors of all control modules 

communicating by means of CAN.

2) Check DTC for ESP

®.

Is DTC U1101 detected?

Go to Step 5.

Check for intermittent 
trouble referring to 
“Intermittent and Poor 
Connection Inspection 
in Section 00”.

5

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP

® control module, TCM 

and BCM communicating by means of CAN.

Is each CAN communication circuit between ESP

®

 control 

module, TCM and BCM opened, shorted or high resistance?

Repair or replace the 
CAN communication 
line.

Go to Step 6.

6

DTC check for ESP

®

1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules 

communicating by means of CAN.

3) Connect connectors to ESP

® control module and TCM.

4) Check DTC for ESP

®.

Is DTC U1101 detected?

Go to Step 7.

Go to Step 8.

7

DTC Check for BCM
1) Turn ignition switch to OFF position.
2) Connect connector to BCM.
3) Check DTC for BCM.

Is DTC U1101 detected?

Check TCM power and 
ground circuit. If circuit 
is OK, substitute a 
known-good TCM and 
check DTC.

Check ESP

® power 

and ground circuit. If 
circuit is OK, substitute 
a known-good ESP

® 

hydraulic unit / control 
module assembly and 
check DTC.

8

CAN communication circuit check
1) Turn ignition switch to OFF position.

Is each CAN communication circuit between disconnected 
control modules (other than ESP

®

 control module and TCM) 

opened, shorted or high resistance?

Repair or replace the 
CAN communication 
line.

Go to Step 9.