Suzuki Grand Vitara JB416 / JB420. Manual - part 427

10E-13 Keyless Start System: 

Keyless Start System Symptom Diagnosis

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Door Lock Function of Keyless Start System

NOTE
Before performing trouble diagnosis procedure for door lock function of keyless start system, check 
that power door lock system operates properly referring to “Power Door Lock System Operation 
Inspection in Section 9F”. If power door lock system does not operate properly, go to “Power Door 
Lock System Symptom Diagnosis in Section 9F”.

 

Keyless Engine Start Function

NOTE
Before performing symptom diagnosis procedure for keyless engine start system, check that engine 
starts by using ignition key. If it cannot be started by using ignition key, go to “Engine Symptom 
Diagnosis in Section 1A”.

 

Condition

Possible cause

Correction / Reference Item

All doors can not be 
locked / unlocked by all of 
door request switches

Circuit fuse(s) blown

Replace fuse(s) and check for short circuit.

Remote controller battery dead

Replace battery.

Remote controller faulty

Check remote controller for operation referring 
to “Remote Controller Inspection”.

Wiring or grounding faulty

Repair circuit.

Antennas or keyless start control 
module faulty

Check input and output signals of Keyless start 
control module referring to “Inspection of 
Keyless Start Control Module and Its Circuits”.

BCM faulty

Check input and output signal of BCM referring 
to “Inspection of BCM and its Circuits in 
Section 10B”.

All doors can not be 
locked / unlocked by any 
one of door request 
switch

Request switch faulty

Check request switch for operation referring to 
“Front Door (Driver and Passenger Side) Rear 
End Door Request Switch Inspection”.

Wiring or grounding faulty

Repair circuit.

Antennas or Keyless start control 
module faulty

Check input and output signals of Keyless start 
control module referring to “Inspection of 
Keyless Start Control Module and Its Circuits”.

BCM faulty

Check input and output signal of BCM referring 
to “Inspection of BCM and its Circuits in 
Section 10B”.

Condition

Possible cause

Correction / Reference Item

Engine can not be started 
by turning Ignition knob 
switch

Circuit fuse(s) blown

Replace fuse(s) and check for short circuit.

Remote controller battery dead

Replace battery.

Remote controller faulty

Check remote controller for operation referring 
to “Remote Controller Inspection”.

Steering lock unit faulty

Check steering lock unit for operation referring 
to “Steering Lock Unit Inspection”.

Wiring or grounding faulty

Repair circuit.

Antennas or Keyless start control 
module faulty

Check input and output signals of Keyless start 
control module referring to “Inspection of 
Keyless Start Control Module and Its Circuits”.

ECM faulty

Check input and output signal of ECM referring 
to “Inspection of ECM and Its Circuits in 
Section 1A”.

Keyless Start System:  10E-14

Keyless Start System Operation Inspection

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Keyless engine start operation

1) Sit in driver seat with remote controller carried with you.
2) Check that all doors are closed and ignition key is not inserted in ignition key cylinder.
3) While pushing ignition knob switch (1) of steering lock unit, check if ignition knob switch can be turned from its lock 

position.
If key indicator lamp (2) in combination meter lights in blue and ignition knob switch can be turned from its lock 
position in this check, keyless engine start operation is in good condition.
If key indicator lamp in combination meter lights in red and ignition knob switch cannot be turned from its lock 
position in this check, go to “Keyless Start System Check”.

NOTE
Pushing ignition knob switch for 5 seconds or longer causes function to protect steering lock 
releasing solenoid against heat to work. Then steering lock unit stops energizing solenoid, preventing 
ignition knob switch from turning. At the same time, key indicator lamp in combination meter turns off. 
In such case, take your hand off from ignition knob switch once and operate it again.

 

Door Lock Operation (Keyless Start System)

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1) Check that all door locks are released and all doors are closed.
2) With remote controller of which ID code is registered in keyless start control module carried with yourself, check 

that pushing driver door request switch once locks all doors.

3) Check that pushing request switch of driver door, passenger door or rear end door once releases corresponding 

door lock.

4) Check that pushing again request switch pushed in Step 3) releases all door locks.

NOTE
If door of which request switch has been pushed is opened/closed before performing Step 4), all door 
locks will not be released even when Step 4) is performed. If Step 4) is performed after door is opened/
closed, only the door of which request switch was pushed will be locked.

 

2

1

I5JB0AA50010-01

I5JB0AA50011-01

10E-15 Keyless Start System: 

Inspection of Keyless Start Control Module and Its Circuits

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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.

 

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”.

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

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

Terminal 

Number

Circuit

Normal 

Voltage

Condition

G44-1

Driver side door antenna (–)

Refer to “Reference waveform No. 1: ”

G44-2

Driver side door antenna (+)

G44-3

Rear end door antenna (–)

Refer to “Reference waveform No. 1: ”

G44-4

Rear end door antenna (+)

G44-5

Center antenna (–)

Refer to “Reference waveform No. 2: ”

G44-6

Center antenna (+)

Keyless Start System:  10E-16

G44-7

Luggage antenna (–)

Refer to “Reference waveform No. 3: ”

G44-8

Luggage antenna (+)

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

—

—

—

G44-14

Ignition switch (Key reminder signal)

10 – 12 V

Insert ignition key to ignition key cylinder

0 – 1 V

Pull out ignition key from ignition key 
cylinder

G44-15

Ignition switch (ON signal)

10 – 12 V

Ignition switch is at ON position

0 – 1 V

Ignition switch is at any position other than 
ON position

G44-16

Driver side door request switch

10 – 12 V

Request switch of driver side door is 
released

0 – 1 V

Request switch of driver side door is 
pushed

G44-17

—

—

—

G44-18

CAN communication line (low) for 
combination meter

Refer to “Reference waveform No. 4: ”

G44-19

CAN communication line (high) for 
combination meter

G44-20

Power supply for steering lock unit

4 – 6 V

Full time

G44-21

—

—

—

G44-22

—

—

—

G44-23

Passenger side door antenna (–)

Refer to “Reference waveform No. 1: ”

G44-24

Passenger side door antenna (+)

G44-25

—

—

—

G44-26

—

—

—

G44-27

—

—

—

G44-28

—

—

—

G44-29

Signal for steering lock unit

4 – 6 V

Ignition knob switch is at any position other 
than ON and OFF position

Refer to “Reference waveform No. 5: ”

G44-30

Ground for steering lock unit

0 – 1 V

Full time

G44-31

—

—

—

G44-32

Rear end door request switch

10 – 12 V

Request switch of rear end door is at any 
position other than ON position

0 – 1 V

Request switch of rear end door is at ON 
position

G44-33

Driver side door lock switch

Refer to “Reference waveform No. 6: ”

G44-34

Ignition knob switch

10 – 12 V

When pushing ignition knob switch of 
steering lock unit

0 – 1 V

When releasing ignition knob switch of 
steering lock unit

G44-35

—

—

—

G44-36

Passenger side door request switch

10 – 12 V

Request switch of passenger side door is 
at any position other than ON position

0 – 1 V

Request switch of passenger side door is 
at ON position

G44-37

Passenger side door lock switch

Refer to “Reference waveform No. 6: ”

G44-38

—

—

—

G44-39

—

—

—

G44-40

—

—

—

Terminal 

Number

Circuit

Normal 

Voltage

Condition