Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 109

10E-3 Keyless Start System: 

However, even when the remote controller is within the operation area as shown above, there are cases where the 
keyless start system doesn’t work under certain conditions as described below. And when the keyless engine start 
function doesn’t work, the key indicator lamp in the combination meter may light up.
• Doors cannot be locked or unlocked using the door lock function of keyless start system when:

– The remote controller which has been registered in the keyless start control module and another un-registered 

one are both carried at the same time

– The remote controller is kept in some metallic container which disturb radio wave transmission/reception
– One of doors is open
– The ignition key is inserted in the ignition key cylinder

• The function of the keyless start system to prevent the remote controller from being closed in the vehicle 

compartment doesn’t work when:
– The remote controller is in the door pocket or in the glove box
– The remote controller is kept in some metallic container which disturb radio wave transmission/reception
– The remote controller is placed close to outside of the vehicle compartment (such as on the instrument panel 

beside the front window shield glass or in a corner of the luggage room)

• The ignition knob switch cannot be turned using the keyless engine start function fails to turn:

– The remote controller which has been registered in the keyless start control module and another un-registered 

one are both carried at the same time

– The remote controller is kept in some metallic container which disturbs radio wave transmission/reception
– The ignition knob switch has been pushed for 5 seconds or longer
– The remote controller is placed close to outside of the vehicle compartment (such as on the instrument panel 

beside the front window shield glass or in a corner of the luggage room)

CAN Communication System Description

S5JB0EA501007

Refer to “CAN Communication System Description in Section 1A” for CAN communication system description. 
Keyless start control module communicates control data with each control module as follows.

Keyless Start Control Module Transmission Data

Keyless Start Control Module Reception Data

BCM

ECM

Combination 

Meter

ID code of keyless start control module

ECM-keyless start control module code

Ignition knob switch signal

Door lock/unlock request signal

Buzzer request signal

Answer back request signal

Key indicator lamp control signal

DATA

Transmit

Keyless Start

 Control Module

I5RW0AA50005-04

 Vehicle speed signal

ECM-keyless start control module code

Door switch status

Door lock status

ECM

BCM

DATA

Receive

Keyless Start

 Control Module

I5RW0AA50006-04

Keyless Start System:  10E-4

Schematic and Routing Diagram

Keyless Start System Electric Wiring Circuit Diagram

S5JB0EA502001

BLK

G44-9

G44-15

G44-14

G44-37

G44-33

G44-16

G44-20
G44-29
G44-30

G44-36

G44-32

G44-10

G44-34

G44-11

WHT/BLK

WHT

WHT

RED/BLU

BLU/YEL

BLU

YEL/RED

RED/BLK

YEL

5V

5V

5V

5V

5V

5V

5V

12V

12V

G44-2
G44-1

WHT/BLU

ORN/BLU

WHT

RED

WHT

RED

G44-18

G44-19

BLU/RED

BRN/RED

G44-24
G44-23

BLK/RED

WHT/RED

G44-7

LT GRN/BLK

GRN/RED G44-8

G44-5

G44-6

PNK/BLK

GRY/RED

G44-4
G44-3

GRY/BLK

GRY/GRN

BLK/YEL

BRN/YEL

ORN

G22-3

G22-4

G22-5

G22-2

G22-1

G22-6

G22-7
G22-8

WHT

WHT

G44

[A]

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32

30 29

24 23

37

18

19

20

WHT

WHT/BLU

WHT/BLU

WHT/RED

WHT/RED

WHT

RED

WHT

RED

6

7

8

9

10

11

12

13

14

15

1

18

21

2

3

5

4

19

20

16

17

I5JB0DA50002-01

[A]: Keyless start control module connector 

(viewed from harness side)

8. Rear end door antenna

16. Combination meter

1. Keyless start control module

9. Center antenna

17. Key indicator lamp

2. Steering Lock unit

10. Luggage room antenna

18. BCM

3. Steering lock solenoid

11. Driver side door request switch

19. ECM

4. Ignition knob switch

12. Passenger side door request switch

20. ABS or ESP

® control module

5. Key reminder switch

13. Rear end door request switch

21. Junction connector

6. Driver side door antenna

14. Driver side door lock switch

7. Passenger side door antenna

15. Passenger side door lock switch

10E-5 Keyless Start System: 

Diagnostic Information and Procedures

DTC Check

S5JB0EA504007

1) Check to make sure that all doors are closed.
2) Open driver side door window glass and door.
3) Check to make sure that ignition key is not inserted 

in ignition key cylinder. If it is, remove it.

4) Perform “Key Indicator Lamp Check in related 

manual”.

5) Close driver side door and within 15 seconds after 

that, perform Steps a) through e) described below.
a) Insert ignition key (1) in ignition key cylinder (2).
b) Remove ignition key from ignition key cylinder.
c) Repeat Steps a) and b) twice.
d) Insert ignition key in ignition key cylinder.
e) Push driver side door request switch (3) 4 times.

At the end of Step e), buzzer sounds 4 times to 
inform that trouble diagnosis mode has started.

6) Read flashing pattern of key indicator lamp which 

represents DTC as shown in example below and 
write it down. When more than 2 DTCs are stored in 
memory, flashing for each DTC is repeated three 
times starting with the smallest DTC number in 
increasing order.

NOTE
Go to “No DTC Detection After Performing 
DTC Check in related manual” in case that 
any DTC is detected after performing the 
procedure mentioned above.

 

7) After completing the check, remove ignition key from 

ignition key cylinder.

Inspection of Keyless Start Control Module and Its Circuits

S5JB0EA504013

Keyless start control module and its circuits can be checked at keyless start control module wiring couplers by 
measuring voltage and resistance.

CAUTION

!

 

Keyless start control module cannot be checked by itself. It is strictly prohibited to connect voltmeter 
or ohmmeter to keyless start control module with coupler disconnected from it.

 

2

3

1

I5JB0AA50007-01

[A]: DTC NO. 12 (Normal)

K: Key indicator lamp

[B]: DTC NO. 52

a: 0.3 seconds

H: Key indicator lamp turned ON

b: 1.0 second

L: Key indicator lamp turned OFF

c: 3.0 seconds

b

c

a

a

[A]

H

L

H

L

[B]

5

2

b

a

c

a

2

1

1

b

a

a

2

K

I6JB01A50004-01

Keyless Start System:  10E-6

Voltage Check

1) Disconnect negative cable (–) at battery.
2) Remove keyless start control module from vehicle body referring to “Keyless Start Control Module Removal and 

Installation in related manual”.

3) Connect connector to keyless start control module.
4) Check voltage at each terminal number of couplers connected.

NOTE

• As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when 

ignition switch is ON.

• Voltage with asterisk (*) cannot be measured by voltmeter because it is pulse signal.

 

G44

[A]

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32

30 29

24 23

37

18

19

20

I5JB0AA50012-02

[A]: Keyless start control module connector (viewed from harness side)

Terminal 

Number

Circuit

Normal 

Voltage

Condition

G44-1

Driver side door antenna (–)

*0 – 5 V

Refer to “Reference waveform No. 1: ”

G44-2

Driver side door antenna (+)

G44-3

Rear end door antenna (–)

*0 – 5 V

Refer to “Reference waveform No. 1: ”

G44-4

Rear end door antenna (+)

G44-5

Center antenna (–)

*–1 – 1 V

Refer to “Reference waveform No. 2: ”

G44-6

Center antenna (+)

*–10 – 20 V

G44-7

Luggage room antenna (–)

*–10 – 10 V

Refer to “Reference waveform No. 3: ”

G44-8

Luggage room antenna (+)

*–8 – 14 V

G44-9

Ground for keyless start control module

0 – 1 V

Ignition switch is at all positions

G44-10

Power source

10 – 12 V

Ignition switch is at all positions

G44-11

Ignition switch (ACC signal)

10 – 12 V

Ignition switch is at ACC or ON position

0 – 1 V

Ignition switch is at any position other than 
ACC or ON position

G44-12

—

—

—

G44-13

—

—

—