Suzuki Grand Vitara JB416 / JB420. Manual — part 305

8B-16 Air Bag System:

DTC Check

S5JB0A8204004

Using SUZUKI Scan Tool

1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector

(DLC) located on underside of instrument panel at
driver’s seat side.

Special tool
(A): SUZUKI scan tool

3) Turn ignition switch to ON position.
4) Read DTC according to instructions displayed on

SUZUKI scan tool and print it or write it down. Refer
to SUZUKI scan tool operator’s manual for further
details.
If communication between scan tool and SDM is not
possible, check if scan tool is communicable by
connecting it to SDM in another vehicle. If
communication is possible in this case, scan tool is
in good condition. Then check data link connector
and serial data line (circuit) in the vehicle with which
communication was not possible.

5) After completing the check, turn ignition switch to

OFF position and disconnect SUZUKI scan tool from
data link connector (DLC) (1).

Using Monitor Connector (If Equipped)

1) Using service wire (3), ground diagnosis switch

terminal (2) in “AIR BAG” monitor coupler (1).

2) Read DTC from flashing pattern of malfunction

indicator lamp (“AIR BAG” warning lamp) Referring
to “DTC Table”.
If lamp does not indicate DTC, proceed to ““AIR
BAG” Warning Lamp Cannot Indicate Flashing
Pattern of DTC (If Equipped with “AIR BAG” Monitor
Coupler)”.

3) After completing the check, turn ignition switch to

OFF position and disconnect service wire from “AIR
BAG” monitor coupler.

Example: When driver air bag initiator circuit resistance high (DTC B1031) is set

(A)

1

I5JB0A820013-01

4. Body ground

1

3

4

1

2

I5JB0A820014-02

DTC B1031

A

B

1

1

3

0

0.3

0.3

0.3

1.0 1.0

1.0

1.0

3.0

3.0

C

D

C

C

C

I5JB0A820015-01

A: “AIR BAG” warning lamp is turned ON

C: Code No.1031

B: “AIR BAG” warning lamp is turned OFF

D: Time (sec.)

Air Bag System: 8B-17

DTC Clearance

S5JB0A8204005

Using SUZUKI Scan Tool

1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector

(DLC) (1) in the same manner as when making this
connection for DTC check.

Special tool
(A): SUZUKI scan tool

3) Turn ignition switch to ON position.
4) Erase DTC according to instructions displayed on

SUZUKI scan tool. Refer to SUZUKI scan tool
operator’s manual for further details.

5) After completing the clearance, perform “DTC

Check” and confirm that normal DTC (NO CODES)
is displayed and not malfunction DTC.

6) Turn ignition switch to OFF position and disconnect

SUZUKI scan tool from DLC.

NOTE
If DTC B1013 or B1021 is stored in SDM, it is
not possible to clear DTC.

Using Monitor Connector (If Equipped)

1) Turn ignition switch to ON position and wait about 6

seconds or more.

2) Using service wire (4), repeat shorting and opening

between diagnosis switch terminal (3) on “AIR BAG”
monitor coupler (1) and body ground (2) 5 times at
about 1 second intervals within 10 seconds.

3) Perform “DTC Check” and confirm that normal DTC

(NO. 0000) is displayed and not malfunction DTC.

NOTE
If DTC B1013 or B1021 is stored in SDM, it is
not possible to clear all DTC.

(A)

1

I5JB0A820013-01

O: Open

T: Max, 10 seconds

S: Short

T1: About 1 sec.

O

S

T

T1 T1

1

3

2

4

5

2

4

1

3

1

I5JB0A820016-01

8B-18 Air Bag System:

Scan Tool Data

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Data list of SDM

Scan Tool Data Definition
Back Up Volt (V): This parameter indicates the

capacity of the backup condenser installed to
maintain the ignition current (as much as possible)
even when the power supply to SDM that ignites the
inflator is shut off.

Battery Volt (V): Battery voltage is an analog input

signal read by SDM.

System ID (4ch/8ch): This parameter indicates the

number of initiator circuits.

Driv A/B Ini Res (Driver air bag initiator resistance)

(ohm): This parameter indicates the resistance of
the driver air bag initiator circuit.

Pass A/B Ini Res (Passenger air bag initiator

resistance) (ohm): This parameter indicates the
resistance of the passenger air bag initiator circuit.

Driv Pret Ini Res (Driver pretensioner initiator

resistance) (ohm): This parameter indicates the
resistance of the driver seat belt pretensioner
initiator circuit.

Pass Pret Ini Res (Passenger pretensioner initiator

resistance) (ohm): This parameter indicates the
resistance of the passenger seat belt pretensioner
initiator circuit.

LH Side Ini Res (Left side-air bag initiator resistance)

(ohm): This parameter indicates the resistance of
the left side-air bag initiator circuit.

RH Side Ini Res (Right side-air bag initiator

resistance) (ohm): This parameter indicates the
resistance of the right side-air bag initiator circuit.

LH Curtain Ini Res (Left side curtain-air bag initiator

resistance) (ohm): This parameter indicates the
resistance of the left side curtain-air bag initiator
circuit.

RH Curtain Ini Res (Right side curtain-air bag

initiator resistance) (ohm): This parameter
indicates the resistance of the right side curtain-air
bag initiator circuit.

“AIR BAG” Warning Lamp Comes ON Steady

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Wiring Diagram

CAUTION

!

Be sure to observe instructions under CAUTION in “Air Bag Diagnostic System Check Flow”.

Scan Tool Data

Normal Condition /

Reference Value

Battery volt

10 – 14 V

Back up volt

27.0 – 33.0 V

System ID

4ch or 8ch

Driv A/B Ini Res

2.1 – 3.8 ohm

Pass A/B Ini Res

1.8 – 2.8 ohm

Driv Pret Ini Res

1.8 – 2.9 ohm

Pass Pret Ini Res

1.8 – 2.9 ohm

LH Side Ini Res

1.8 – 2.6 ohm

RH Side Ini Res

1.8 – 2.6 ohm

LH Curtain Ini Res

1.8 – 2.8 ohm

RH Curtain Ini Res

1.8 – 2.8 ohm

BLK

G47-18

G47-20

L2

L1

GND

WL

“G47”

12V

1

2

6

8

4

5

RED

PPL/RED

BLK/YEL

YEL/BLK

BLK

RED

YEL/BLK

“G01”

7

“G28”

“G03”

G47-16

IG

[A]

G46-7

G46-16

L2

L1

GND

WL

“G46”

L4

L3

12V

G46-11

IG

[B]

L6

L5

3

10

10

9

9

9

9

11

I5JB0A820017-01

[A]: Without side-air bag and curtain-air bag

3. Junction block assembly

7. Lamp driver

11. Ground for air bag system

[B]: With side-air bag and curtain-air bag

4. “A/B” fuse

8. “AIR BAG” warning lamp

1. From main fuse

5. “METER” fuse

9. Connection detection pin

2. Ignition switch

6. Combination meter

10. SDM

Air Bag System: 8B-19

Flow Test Description
Step 1: Check for “AIR BAG” fuse blown.
Step 2: Check for loose connection between junction block assembly connector and junction block assembly.
Step 3: Check for loose connection between SDM connector and SDM.
Step 4: Check for SDM power supply circuit.
Step 5: Check for open or short circuit between “AIR BAG” warning lamp circuit and ground.

Troubleshooting

Step

Action

Yes

No

1

1) Turn ignition switch OFF.
2) Remove and inspect “A/B” fuse.

Is fuse good?

Go to Step 2.

“RED” wire short to
ground.
After repair, replace “A/
B” fuse.

2

1) Check for loose connection of junction block assembly

connector “G01”.

Is it connected securely?

Go to Step 3.

Correct connector “G01”
securely.

3

Check for loose connection of SDM connector “G47” or
“G46”.

Is it connected securely?

Go to Step 4.

Correct connector “G47”
or “G46” securely.

4

1) Disconnect SDM connector “G47” or “G46”.
2) Check proper connection to SDM at terminal “G47-16” or

“G46-11”.

3) If OK, then check voltage between “G47-16” terminal [A]

or “G46-11” terminal [B] of SDM connector and body
ground with ignition switch ON.

Special tool
(A): 09932–76010

Is it 8 V or more?

Go to Step 5.

“RED” wire (between “A/
B” fuse and SDM
connector) open or
“BLK/YEL” wire
(between ignition switch
and “A/B” fuse) open or
short to ground.

(A)

[A]

[B]

“G47-16”

“G46-11”

I5JB0A820018-01