Suzuki Grand Vitara JB416 / JB420. Manual — part 406

The cruise control system is a device which maintains a preset vehicle speed while driving at a high speed, e.g., on a
highway. It allows the driver to drive his vehicle at a constant speed of 40 km/h (25 mile/h) or higher without
depressing the accelerator pedal. The system also has such functions as to change the vehicle speed without
operating the accelerator pedal (but using SET/COAST and RES/ACC switches), cancel cruise control (CANCEL
switch) and resume the speed in memory automatically after cruise control is cancelled (RES/ACC switch). The
system mainly consists of electric throttle body assembly, ECM, cruise control switch (MAIN switch, SET/COAST
switch, RES/ACC switch and CANCEL switch), etc.

I5JB0AA10001-01

1. Combination meter

7. SET/COAST switch

13. ECM

2. “CRUISE” indicator lamp

8. CANCEL switch

14. Transmission range switch (A/T vehicle only)

3. “SET” indicator lamp

9. Wheel speed sensor (vehicle speed signal)

15. TCM (A/T vehicle only)

4. Cruise control switch assembly

10. ABS hydraulic unit / control module

16. Electric throttle body assembly

5. RES/ACC switch

11. Brake light switch with brake pedal position switch

6. MAIN switch

12. Clutch pedal position switch (M/T vehicle only)

Cruise Control System: 10A-2

Components and Functions of Cruise Control System

S5JB0AA101002

Component

Function

ECM and electric throttle body
assembly

ECM executes centralized control over all functions including setting a constant speed,
resuming it, setting coast, cancelling cruise control limiting minimum speed.
ECM controls electric throttle valve opening to keep actual vehicle speed at set (target)
speed.

MAIN switch

This switch has a momentary contact type button to press cruise control
system ON and OFF.

SET/COAST switch

When this switch is pressed (ON) and then released (OFF) while vehicle is running at
a speed 40 km/h (25 mile/h) or higher, vehicle speed at that OFF moment is stored in
memory and it is maintained (constant cruising).
Pressing this switch (ON) continuously during constant cruising keeps slowing down
vehicle speed as long as it is ON. When it is released (OFF), vehicle speed at that
moment is stored in memory and vehicle starts constant cruising.

RES/ACC switch

When this switch is pressed (ON) during constant cruising, vehicle speed keeps
increasing as long as it is ON. When it is released (OFF), vehicle speed at that
moment is stored in memory and vehicle starts constant cruising. If vehicle speed is
higher than 40 km/h (25 mile/h) after cruise control is cancelled, pressing this switch
ON momentarily will resume the speed at which vehicle was running before
cancellation.

CANCEL switch

When this switch is pressed (ON), cruise control (throttle valve control) is cancelled.

Wheel speed sensor (vehicle
speed signal)

ECM receives speed sensor signal from ABS hydraulic unit / control module through
CAN communication and calculates vehicle speed using that signal.

Brake light switch

Brake light switch has 2 contact points. One contact point closes when brake pedal is
depressed to light brake light and provides a voltage signal to the ECM.
The other contact point (brake pedal position switch) opens when brake pedal is
depressed, to shut off power to cruise control of ECM, thereby cancelling cruise
control (throttle valve control).
This switch is installed to cancel cruise control (constant cruising).

Clutch pedal position switch
(M/T vehicle only)

When clutch pedal is depressed, clutch pedal position switch closes and provides a
ground signal to ECM.
ECM cancels cruise control (throttle valve control) when this signal is inputted.

Transmission range switch (A/
T vehicle only)

When selector lever is placed in either “P”, “R” or “N” position, transmission range
switch closes and provides a ground signal to TCM. TCM transmits signal from
transmission range switch to ECM through CAN communication. When ECM receives
a signal indicating that selector lever position is “P”, “R” or “N”, it cancels cruise control
(throttle valve control).

TCM

TCM receives the SET signal for the cruise control from ECM through CAN
communication. When TCM receives the SET signal from ECM, the gear shift control
is performed by using the gear shift map for the cruise control changed from the one
for normal gear shift. For details, refer to “Automatic Gear Shift Table in Section 5A”.

“CRUISE” indicator lamp

In the state with ignition switch ON and cruise control system OFF, pressing MAIN
switch once and releasing it will activate the cruise control system and ECM will cause
indicator lamp to light up.

“SET” indicator lamp

It lights up when cruise control (throttle valve control) is functioning.

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Suzuki Grand Vitara JB416 / JB420. Manual — part 406

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