Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 98

10-ii Table of Contents

Immobilizer Control System Introduction .......... 10C-*
On-Board Diagnostic System Description 

(Self-diagnosis Function) ................................ 10C-*

Schematic and Routing Diagram......................10C-2

Immobilizer Control System Wiring Circuit 

Diagram ..........................................................10C-2

Component Location ......................................... 10C-*

Immobilizer Control System Components 

Location .......................................................... 10C-*

Diagnostic Information and Procedures..........10C-3

Immobilizer Control System Check ................... 10C-*
Diagnostic Trouble Code (DTC) Check............. 10C-*
Diagnostic Trouble Code (DTC) Clearance ...... 10C-*

Diagnostic Trouble Code (DTC) Table..............10C-3

Scan Tool Data ................................................. 10C-*
Immobilizer Indicator Lamp Does Not Come 

ON with Ignition Switch ON and Engine Stop .. 10C-*

Immobilizer Indicator Lamp Remains ON after 

Engine Start .................................................... 10C-*

DTC P1614: Transponder Response Error.......10C-3
DTC P1615: Steering Lock Unit 

Communication Error (for Vehicle with 
Keyless Start System).....................................10C-5

DTC P1616: Unregistered Keyless Start 

Control Module (for Vehicle with Keyless 
Start System) ..................................................10C-7

DTC P1618: Keyless Start Control Module 

CAN Communication Error (for Vehicle with 
Keyless Start System).....................................10C-8

DTC P1621: Immobilizer Communication 

Line Error ......................................................10C-11

DTC P1622: EEPROM Error...........................10C-14
DTC P1623: Unregistered Transponder .........10C-14
DTC P1625: Immobilizer Antenna Error..........10C-15
DTC P1636: Immobilizer Information 

Registration Failure .......................................10C-16

DTC P1638: Immobilizer Information 

Mismatched...................................................10C-17

Inspection of Immobilizer Control Module 

(ICM) and Its Circuit ........................................ 10C-*

Repair Instructions ............................................ 10C-*

Immobilizer Control Module (ICM) Removal 

and Installation ................................................ 10C-*

Registration of the Ignition Key ......................... 10C-*
Procedure after ECM Replacement .................. 10C-*

Keyless Start System.............................10E-1

Precautions.........................................................10E-1

Precautions in Diagnosing Troubles .................10E-1

General Description ...........................................10E-2

Keyless Start System Description ..................... 10E-*
Parts and Functions .......................................... 10E-*
Keyless Engine Start Function .......................... 10E-*
Door Lock Function of Keyless Start System.... 10E-*

Operation Area of Remote Controller................10E-2

Alarm Function .................................................. 10E-*

CAN Communication System Description.........10E-3

Schematic and Routing Diagram ......................10E-4

Keyless Start System Electric Wiring Circuit 

Diagram...........................................................10E-4

Diagnostic Information and Procedures ..........10E-5

Self-Diagnosis Function .................................... 10E-*
Keyless Start System Diagnosis Introduction ... 10E-*
Keyless Start System Check............................. 10E-*
Customer Questionnaire (Example).................. 10E-*
Key Indicator Lamp Check ................................ 10E-*

DTC Check........................................................10E-5

DTC Table......................................................... 10E-*
DTC Clearance ................................................. 10E-*
Keyless Start System Symptom Diagnosis ....... 10E-*
Keyless Start System Operation Inspection...... 10E-*
Door Lock Operation (Keyless Start System) ... 10E-*

Inspection of Keyless Start Control Module 

and Its Circuits ................................................10E-5

No DTC Detection After Performing DTC 

Check .............................................................. 10E-*

Key Indicator Lamp Circuit Check (Key 

Indicator Lamp Doesn’t Light when Ignition 
Knob Switch is Pushed.) ................................. 10E-*

Keyless Start Control Module Power and 

Ground Circuit Check...................................... 10E-*

DTC No. 11: Communication Error with 

Steering Lock Unit........................................... 10E-*

DTC No. 13 / No. 14: Release Signal Error 

from Steering Lock Unit / Steering Lock Unit 
Malfunction...................................................... 10E-*

DTC No. 21 / No. 22: Internal Error of Keyless 

Start Control Module (EEPROM Reading 
Error) / (EEPROM Writing Error)..................... 10E-*

DTC No. 31: Lost Communication with BCM ..10E-11
DTC No. 33: Control Module Communication 

Bus Off ..........................................................10E-13

DTC No. 51 / No. 52 / No. 53: Driver Side / 

Passenger Side / Rear End Door Request 
Switch Failure.................................................. 10E-*

Repair Instructions ............................................ 10E-*

Antennas and Request Switches Removal 

and Installation ................................................ 10E-*

Front Door (Driver and Passenger Side), Rear 

End Door Request Switch Inspection.............. 10E-*

Steering Lock Unit Removal and Installation .... 10E-*
Steering Lock Unit Inspection ........................... 10E-*
Front Door Lock Switch Inspection ................... 10E-*
Keyless Start Control Module Removal and 

Installation ....................................................... 10E-*

Remote Controller Inspection............................ 10E-*
Replacement of Remote Controller Battery ...... 10E-*
Registration Procedure for Remote Controller 

ID Code ........................................................... 10E-*

Cruise Control System:  10A-1

Control Systems

Cruise Control System

General Description

Cruise Control System Construction

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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 (ON/OFF) switch, SET/
COAST switch, RES/ACC switch and CANCEL switch), etc.

15

14

16

16

10

10

13

15

14

9

11

12

13

3

5

8

6

7

4

1

2

9

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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 or ESP

® control module

16. Electric throttle body assembly

5. RES/ACC switch

11. Brake light switch with brake pedal position switch

6. MAIN (ON/OFF) switch

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

10A-2 Cruise Control System: 

Components and Functions of Cruise Control System

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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 (ON/OFF) 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 or ESP

® 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 
(ON/OFF) 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.

Cruise Control System:  10A-3

Cancel Conditions of Cruise Control System

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Constant cruising is cancelled under the following conditions.
• *Ignition switch is turned OFF.
• MAIN (ON/OFF) switch is turned OFF.
• Vehicle speed becomes lower than minimum operating speed (40 km/h (25 mile/h)).
• *Vehicle speed varies beyond cancel speed range (–10 km/h (–6 mile/h)) from preset speed.
• *Brake pedal is depressed. (Brake light switch is turned ON).
• *Clutch pedal is depressed (Clutch pedal position switch is turned ON) (For M/T vehicle).
• *Selector lever is shifted to “P”, “R” or “N” range.
• *CANCEL switch is turned ON.
• *ESP

® is operating (if equipped).

NOTE
When constant cruising is cancelled under any condition with * (asterisk), vehicle speed before 
cancellation can be resumed by operating RES/ACC switch, provided that vehicle speed is higher than 
40 km/h (25 mile/h).

 

Schematic and Routing Diagram

Cruise Control System Input / Output Diagram

S5JB0EA102002

Input

Output

MAIN switch

Cruise control switch

RES/ACC switch
SET/COAST switch

CANCEL switch

CPP switch
(M/T model)

Stop (brake) lamp switch

Wheel speed sensor

ABS or ESP
control module 

(vehicle speed signal)

ECM

Electric throttle body
(throttle valve control)

Combination meter
(Indicator lamp control)

TCM (Shift control)
(A/T model)

(A/T model)

Transmission range switch
(            or      range signal)

“P”, “R”

“N”

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