Suzuki Grand Vitara JB419. Manual - part 174

Cruise Control System:  10A-5

Diagnostic Information and Procedures

Cruise Control System Symptom Diagnosis

S5JB0BA104001

NOTE

• ECM uses ABS or ESP

® control module and CAN communication to transmit and receive data for 

cruise control. Therefore, check that no DTC is detected in ECM and 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 
lamp does not turn ON or 
OFF

MAIN switch faulty

Check MAIN switch for function referring to 
“Cruise Control Switch Inspection in related 
manual”.

SET/COAST switch faulty

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

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 switch faulty

Check MAIN switch for function referring to 
“Cruise Control Switch Inspection in related 
manual”.

SET/COAST switch faulty

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

Brake (stop) Lamp switch faulty

Check brake (stop) lamp switch for function 
referring to “Stop (Brake) Lamp Switch 
Inspection in related manual”.

CPP switch faulty (M/T model)

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

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 in related manual”.

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 in related 
manual”.

Stop (brake) lamp switch faulty

Check brake (stop) lamp switch for function 
referring to “Stop (Brake) Lamp Switch 
Inspection in related manual”.

CPP switch faulty

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

Wiring or grounding faulty

Repair.

ECM faulty

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

10A-6 Cruise Control System: 

Inspection of Cruise Control System Circuit

S5JB0BA104012

Cruise control system is controlled by ECM. Each switch and circuit can be checked by taking measurement of 
terminal voltage.

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

Terminal arrangement of ECM connector viewed from harness side

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

RES/ACC switch faulty

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

Wiring or grounding faulty

Repair.

ECM faulty

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

Condition

Possible cause

Correction / Reference Item

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

I5JB0BA10004-01

Terminals

Circuit

Normal Voltage

Condition

E66-17 – ground

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.

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.

E66-20 – ground

Cruise control main switch 
circuit

0 – 1 V

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

10 – 14 V

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

E66-23 – ground

Ground circuit for cruise control 
command switch

Below 1.3 V

Ignition switch is at ON position.

E66-28 – ground Stop lamp switch circuit

0 V

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

10 – 14 V

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

E66-30 – ground CPP switch circuit

10 – 14 V

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

0 V

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

C85-8 – ground

Brake pedal position switch 
circuit

10 – 14 V

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

0 V

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

Body Electrical Control System:  10B-1

Control Systems

Body Electrical Control System

Precautions

Precautions in Diagnosing Trouble

S5JB0BA200001

• Diagnostic information stored in BCM memory can be cleared as well as checked by using SUZUKI scan tool. 

Before using scan tool, read its Operator’s (Instruction) Manual carefully to have good understanding as to what 
functions are available and how to use it.

• Be sure to read “Precautions for Electrical Circuit Service in Section 00 in related manual” before inspection and 

observe what is written there.

• Communication of ECM, BCM, ABS or ESP

® control module, 4WD control module (if equipped), steering angle 

sensor (if equipped) and combination meter is established by CAN (Controller Area Network).
Therefore, be sure to read “Precaution for CAN Communication System in Section 00 in related manual” before 
inspection and handle CAN communication line.

General Description

CAN Communication for BCM

S5JB0BA201002

BCM communicates with each of ECM, ESP

® control module (if equipped), 4WD control module (if equipped) and 

combination meter about the following data. For details of CAN communication, refer to “CAN Communication System 
Description in Section 1A”.

BCM Transmission Data

A/C switch ON signal

Brake fluid level switch signal

Parking brake switch signal

Seat belt buckle switch signal

Charging system signal

Engine oil pressure switch signal

Illumination ON signal

Lighting switch signal

DRL operation signal 

Door switch status

Diagnostic trouble code (DTC)

 

ECM

Combination 

Meter

ESP

Control
Module

(if equipped)

Transmit

DATA

BCM

I5JB0BA20001-01

10B-2 Body Electrical Control System: 

BCM Reception Data

Theft Deterrent Light
Theft deterrent light (2) is installed on the HVAC control module (1) for the theft preventive purpose. 
The BCM makes the theft deterrent light flash at certain intervals after the ignition switch is turned off until it is turned 
on again. Also, DTCs stored in BCM can be checked by reading the flashing patterns of the theft deterrent light when 
diagnosing troubles.

Engine speed signal

Engine coolant temp. signal

Vehicle speed signal

Stop (brake) lamp switch signal

Magnet clutch signal

A/C refrigerant pressure signal

Distance kilometers per liter of

fuel signal

Additional heater relay signal

Radiator cooling fan relay signal

Buzzer request signal

ECM

4WD Control Module

(if equipped)

DATA

BCM

Receive

I5JB0BA20002-01

2

1

I5JB0AA20001-01