Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 524

10A-6 Cruise Control System: 

Diagnostic Information and Procedures

Cruise Control System Symptom Diagnosis

S6JB0AA104001

NOTE

• ECM uses TCM, combination meter, ABS or ESP

® control module and CAN communication to 

transmit and receive data for cruise control. Therefore, check that no DTC is detected from ECM, 
TCM, ABS or ESP

® control module before performing this Cruise Control System Symptom 

Diagnosis. If DTC is detected, correct trouble indicated by that DTC first.

• Check each part in the order from the top of the following list.

 

Condition

Possible cause

Correction / Reference Item

CRUISE or SET indicator 
light does not turn ON or 
OFF

MAIN (ON/OFF) switch faulty

Check MAIN (ON/OFF) switch for function 
referring to “Cruise Control Switch Inspection”.

SET/COAST switch faulty

Check SET/COAST switch for function 
referring to “Cruise Control Switch Inspection”.

Brake light switch faulty

Check brake light switch for function referring 
to “Brake Light Switch Inspection”.

Wiring or grounding faulty

Repair.

Combination meter faulty

Replace.

ECM faulty

Replace after making sure that none of above 
parts is faulty.

Vehicle speed can not be 
set

MAIN (ON/OFF) switch faulty

Check MAIN (ON/OFF) switch for function 
referring to “Cruise Control Switch Inspection”.

SET/COAST switch faulty

Check SET/COAST switch for function 
referring to “Cruise Control Switch Inspection”.

Brake light switch faulty

Check brake light switch for function referring 
to “Brake Light Switch Inspection”.

CPP switch faulty (M/T model)

Check CPP switch for function referring to 
“Clutch Pedal Position (CPP) Switch (for 
Cruise Control) Inspection and Adjustment”.

Wiring or grounding faulty

Repair.

ECM faulty

Replace after making sure that none of above 
parts is faulty.

Acceleration or 
deceleration is not 
available by using RES/
ACC or SET/COAST 
switch

RES/ACC or SET/COAST switch faulty Check RES/ACC or SET/COAST switch for 

function referring to “Cruise Control Switch 
Inspection”.

Wiring or grounding faulty

Repair.

ECM faulty

Replace after making sure that none of above 
parts is faulty.

Cruise control cannot be 
cancelled

CANCEL switch faulty

Check CANCEL switch for function referring to 
“Cruise Control Switch Inspection”.

Brake light switch faulty

Check brake light switch for function referring 
to “Brake Light Switch Inspection”.

CPP switch faulty

Check CPP switch for function referring to 
“Clutch Pedal Position (CPP) Switch (for 
Cruise Control) Inspection and Adjustment”.

Wiring or grounding faulty

Repair.

ECM faulty

Replace after making sure that none of above 
parts is faulty.

Cruise control at vehicle 
speed stored in memory 
cannot be resumed after 
cruise control was 
cancelled by means other 
than MAIN (ON/OFF) 
switch

RES/ACC switch faulty

Check RES/ACC switch for function referring 
to “Cruise Control Switch Inspection”.

Wiring or grounding faulty

Repair.

ECM faulty

Replace after making sure that none of above 
parts is faulty.

Cruise Control System:  10A-7

Inspection of Cruise Control System Circuit

S6JB0AA104002

Cruise control system is controlled by ECM. Each switch and circuit can be checked by taking measurement of 
terminal voltage and terminal to terminal resistance of ECM. When measuring these values, be sure to read 
precautions for measurement described under “Inspection of ECM and Its Circuits: For Petrol Engine Model in Section 
1A”.

Voltage Check
Check voltage between the following terminals with ECM connector connected.

Terminal arrangement of ECM connector viewed from harness side

E23

C37

3

4

18

19

5

6

7

10

11

17

20

47

46

49

50

51

21

22

52

16

25

9

24

14
29

55

57

54 53

59

60

58

2

26

27

28

15
30

56

48

32

31

34

35

36

37

40

42

39 38

44

45

43

41

33

1

12

13

23

8

3

4

18

19

5

6

7

10

11

17

20

47

46

49

50

51

21

22

52

16

25

9

24

14
29

55

57

54 53

59

60

58

2

26

27

28

15
30

56

48

32

31

34

35

36

37

40

42

39 38

44

45

43

41

33

1

12

13

23

8

33

34

39

40

41

42

43

44

35

36

37

38

45

46

47

48

9

10

11

12

13

14

1

3

5

7

2

4

6

8

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

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

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

C85

C86

E66

[A]

[B]

I6JB0AA10005-01

[A]: Petrol engine model

[B]: Diesel engine model

Terminals

Circuit

Normal Voltage

Condition

E23-6 – ground 

(Petrol engine model) Cruise control main switch 

circuit

0 – 1 V

Ignition switch is at ON position and cruise 
control MAIN switch is not pushed.

E66-20 – ground 

(Diesel engine model)

10 – 14 V

Ignition switch is at ON position and cruise 
control MAIN switch is kept in push.

E23-7 – ground 

(Petrol engine model)

CPP switch circuit

10 – 14 V

Ignition switch is at ON position and clutch 
pedal is not depressed.

E66-30 – ground 

(Diesel engine model)

0 V

Ignition switch is at ON position and clutch 
pedal is depressed.

E23-8 – ground 

(Petrol engine model) Brake pedal position switch 

circuit

10 – 14 V

Ignition switch is at ON position and brake 
pedal is not depressed.

C85-14 – ground 

(Diesel engine model)

0 V

Ignition switch is at ON position and brake 
pedal is depressed.

E23-20 – ground 

(Petrol engine model)

Stop lamp switch circuit

0 V

Ignition switch is at ON position and brake 
pedal is not depressed.

E66-28 – ground 

(Diesel engine model)

10 – 14 V

Ignition switch is at ON position and brake 
pedal is depressed.

E23-21 – ground 

(Petrol engine model) Ground circuit for cruise control 

command switch

Below 1.3 V

Ignition switch is at ON position.

E66-23 – ground 

(Diesel engine model)

10A-8 Cruise Control System: 

Repair Instructions

Cruise Control Switch Removal and Installation

S6JB0AA106001

For removal and installation, refer to “Remote Audio 
Control Switch Removal and Installation (If Equipped) in 
Section 9C”.

Cruise Control Switch Inspection

S6JB0AA106002

NOTE
Never disassemble cruise control switch. 
Disassembly will spoil its original functions.

 

1) Remove driver air bag (inflator) module referring to 

“Driver Air Bag (Inflator) Module Removal and 
Installation in Section 8B”.

2) Disconnect cruise control switch connector (1) from 

control coil.

3) Check cruise control switch as follow.

For MAIN (ON/OFF) Switch
Check for continuity between “1” and “8” terminals under 
each condition below.
If check result is not satisfactory, replace cruise control 
switch (2).

Cruise MAIN (ON/OFF) switch (3) specification: [B]
Switch button released: Infinity
Switch button pressed: Continuity

For SET/COAST, RES/ACC and CANCEL Switch
Check for resistance between “7” and “9” terminals 
under each condition below.
If check result is not satisfactory, replace cruise control 
switch (2).

SET/COAST, RES/ACC and CANCEL switches 
resistance: [C]
All switches released (OFF): Infinity
CANCEL switch (4) pressed (ON): About 0 

Ω

SET/COAST switch (5) pressed (ON): 209 – 231 

Ω

RES/ACC switch (6) pressed (ON): 864 – 956 

Ω

CPP Switch (for Cruise Control) Removal and 
Installation

S6JB0AA106003

Removal

1) Disconnect connector of CPP switch (for cruise 

control) (1) with ignition switch OFF.

2) Remove CPP switch (for cruise control) (1) from 

pedal bracket.

E23-22 – ground 

(Petrol engine model)

Cruise control command switch 
(SET/COAST, ACC/RES and 
CANCEL switch) circuit

0 – 0.1 V

Ignition switch is at ON position and cruise 
control cancel switch is kept in push.

1.5 – 1.9 V

Ignition switch is at ON position and SET/
COAST switch of cruise control is kept in 
push.

E66-17 – ground 

(Diesel engine model)

3.2 – 3.7 V

Ignition switch is at ON position and ACC/
RES switch of cruise control is kept in push.

4.5 – 5.5 V

Ignition switch is at ON position and cruise 
control command switches are not pushed.

Terminals

Circuit

Normal Voltage

Condition

[A]: Cruise control switch connector viewed from harness side

2. Brake light switch

1

5

3

6

7 8 9

1

5

3

6

7 8 9

[B]

[C]

[A]

6

1

4

5

2

3

I6JB0AA10006-01

1

2

I5JB0AA10007-01

Cruise Control System:  10A-9

Installation

1) Install CPP switch (for cruise control) (2) to pedal 

bracket.

2) With clutch pedal (1) released, adjust switch position 

so that clearance between end of thread and clutch 
pedal bracket is within specification.

Clearance between end of thread and clutch 
pedal bracket
“a”: 0.5 – 1.5 mm (0.02 – 0.059 in.) (LHD)
“a”: 2.0 – 3.0 mm (0.079 – 0.118 in.) (RHD)

3) Tighten lock nut (3) to specified torque.

Tightening torque
CPP switch lock nut:  7.5 N·m (0.75 kgf-m, 5.5 lb-
ft)

4) Connect connector to CPP switch (for cruise control) 

(2) securely.

Clutch Pedal Position (CPP) Switch (for Cruise 
Control) Inspection and Adjustment

S6JB0AA106004

Inspection
Check for resistance between terminals under each 
condition below. If check result is not satisfactory, 
replace.

CPP switch (for cruise control) resistance
When switch shaft is pushed [A]: No continuity
When switch shaft is free [B]: Continuity

Adjustment
For adjustment, refer to “Installation” under “CPP Switch 
(for Cruise Control) Removal and Installation”. 

Brake Light Switch Removal and Installation

S6JB0AA106005

For removal and installation, refer to “Brake Light Switch 
Adjustment in Section 4A”.

Brake Light Switch Inspection

S6JB0AA106006

Check for continuity between terminals referring to 
“Brake Light Switch Inspection in Section 9B”.

ECM Removal and Installation

S6JB0AA106007

For removal and installation, refer to “Engine Control 
Module (ECM) Removal and Installation: For Petrol 
Engine Model in Section 1C” or “Engine Control Module 
(ECM) Removal and Installation: For Diesel Engine 
Model in Section 1C”.

Specifications

Tightening Torque Specifications

S6JB0AA107001

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fastener Information in Section 0A”.

“a”

2

1

3

I5JB0AA10008-01

I5JB0AA10009-01

Fastening part

Tightening torque

Note

N

⋅m

kgf-m

lb-ft

CPP switch lock nut

7.5

0.75 

5.5

)