Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 534

10B-37 Body Electrical Control System: 

Reference waveform No. 1
HVAC control module serial communication signal (1)

Reference waveform No. 2
HVAC control module and information display serial 
communication signal (1)

Reference waveform No. 3
Rear wiper LOW or INT signal (1)

Reference waveform No. 4
SDM communication signal (1)

Measurement terminal CH1: “G30-4” to “G30-12”
Oscilloscope setting

CH1: 5 V / DIV
TIME: 2 ms / DIV

Measurement condition Ignition switch is at ON position

Measurement terminal CH1: “G30-5” to “G30-12”
Oscilloscope setting

CH1: 5 V/DIV
TIME: 10 ms/DIV

Measurement condition Ignition switch is at ON position

I5JB0AA20013-01

I5JB0AA20014-01

Measurement terminal Rear wiper LOW signal:

CH1: “G30-6” to “G30-12”
Rear wiper INT signal:
CH1: “G30-7” to “G30-12”

Oscilloscope setting

CH1: 5 V/DIV
TIME: 10 ms/DIV

Measurement condition Rear wiper LOW signal:

• Ignition switch is at ON 

position, rear wiper switch is 
at any position other than 
LOW position

Rear wiper INT signal:
• Ignition switch is at ON 

position, rear wiper switch is 
at any position other than 
INT position

Measurement terminal CH1: “G30-19” to “G30-12”
Oscilloscope setting

CH1: 2 V/DIV
TIME: 400 ms/ DIV

Measurement condition Ignition switch is at ON position

I5JB0AA20015-01

I5JB0AA20016-01

Body Electrical Control System:  10B-38

Reference waveform No. 5
Vehicle speed pulse output signal (1)

Reference waveform No. 6
CAN communication signal

Reference waveform No. 7
Brake fluid level, parking brake or driver seat belt switch 
signal (1)

Measurement terminal CH1: “G30-22” to “G30-12”
Oscilloscope setting

CH1: 5 V / DIV
TIME: 200 ms / DIV

Measurement condition Vehicle speed at 10 km/h (6 

mph)

Measurement terminal CAN communication signal for 

each control module
CH1: “G31-1” to “G30-12”
CH2: “G31-3” to “G30-12”
CAN communication signal for 
DLC
CH1: “G31-2” to “G30-12”
CH2: “G31-4” to “G30-12”

Oscilloscope setting

CH1: 1 V / DIV
CH2: 1 V / DIV
TIME: 40 

µs / DIV

Measurement condition Ignition switch is at ON position

1. CAN communication line signal (High)
2. CAN communication line signal (Low)

I5JB0AA20017-01

I5JB0AA20018-01

Measurement terminal Brake fluid level switch signal:

CH1: “G31-7” to “G30-12”
Parking brake switch signal:
CH1: “G31-8” to “G30-12”
Driver side seat belt switch 
signal:
CH1: “G31-40” to “G30-12”

Oscilloscope setting

CH1: 2 V / DIV
TIME: 20 ms / DIV

Measurement condition Brake fluid level switch:

• Ignition switch is at ON 

position and brake fluid level 
is at specified level

Parking brake switch:
• Ignition switch is at ON 

position and parking brake 
lever is released.

Driver side seat belt switch:
• Ignition switch is at ON 

position and driver seat belt 
is fastened

I5JB0AA20019-01

10B-39 Body Electrical Control System: 

Reference waveform No. 8
Oil pressure switch signal (1)

Reference waveform No. 9
Keyless entry receiver signal (1)

Repair Instructions

BCM Removal and Installation

S6JB0AA206001

Removal

1) Disconnect negative cable from battery.
2) Remove steering column hole cover (1).
3) Disconnect connectors from BCM.
4) Remove BCM (2).

Installation
Reverse removal procedure for installation, noting 
following point.
• Connect connectors securely until it clicks.

Outside Air Temperature Sensor Removal and 
Installation

S6JB0AA206002

For removal and installation, refer to “Outside Air 
Temperature Sensor Removal and Installation (If 
Equipped) in Section 9C”.

Outside Air Temperature Sensor Inspection

S6JB0AA206003

For inspection, refer to “Outside Air Temperature Sensor 
Inspection (If Equipped) in Section 9C”.

Measurement terminal CH1: “G31-9” to “G30-12”
Oscilloscope setting

CH1: 2 V / DIV
TIME: 20 ms / DIV

Measurement condition Engine is running and oil 

pressure is in normal condition

I5JB0AA20020-01

Measurement terminal CH1: “G31-19” to “G30-12”
Oscilloscope setting

CH1: 2 V / DIV
TIME: 200 ms / DIV

Measurement condition Lock or unlock button of key 

less entry transmitter is 
pushed

I5JB0AA20021-01

1

2

I5JB0AA20022-01

Body Electrical Control System:  10B-40

DRL Function Setting Procedure

S6JB0AA206004

DRL is controlled by BCM which has a function to set 
operable / non-operable mode of DRL. With a new BCM, 
its DRL is set to the non-operable mode.
Therefore, when BCM has been replaced in the country 
where DRL operation is required by the statutory 
regulation, set DRL to the operable mode according to 
the procedure described below.
Also, performing the same procedure when DRL is in the 
operable mode will change DRL setting to the non-
operable mode.

1) Turn ignition switch to ON position.
2) Perform Steps a) through f) described blow within 15 

seconds after Step 1).
a) Turn lighting switch to CLEARANCE position.
b) Turn lighting switch to OFF position.
c) Repeat Steps a) and b) five times.
d) Turn lighting switch to HEAD position.
e) Turn lighting switch to OFF position.
f) Repeat Steps a) and e) five times.

3) After Step f), buzzer sounds twice which indicates 

that DRL has been set to operable mode.

NOTE
When DRL setting has been changed from 
operable mode to non-operable mode, buzzer 
sounds once.

 

4) After confirming buzzer, turn ignition switch to OFF 

position.

Special Tools and Equipment

Special Tool

S6JB0AA208001

SUZUKI scan tool
—
This kit includes following 
items. 1. Tech 2, 2. PCMCIA 
card, 3. DLC cable, 4. SAE 
16/19 adapter, 5. Cigarette 
cable, 6. DLC loop back 
adapter, 7. Battery power 
cable, 8. RS232 cable, 9. 
RS232 adapter, 10. RS232 
loop back connector, 11. 
Storage case, 12. )