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
—
—
—
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