Suzuki Grand Vitara JB627. Service manual - part 298

8B-18 Air Bag System: 

Scan Tool Data

S6JB0B8204006

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 Light Comes ON Steady

S6JB0B8204007

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. Light driver

11. Ground for air bag system

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

4. “A/B” fuse

8. “AIR BAG” warning light

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 light 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

8B-20 Air Bag System: 

NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.

 

5

1) Disconnect combination meter connector “G28” referring 

to “Combination Meter Removal and Installation in 
Section 9C”.

2) Check proper connection to combination meter at “YEL/

BLK” terminal for “AIR BAG” warning light and to SDM at 
terminal “G47-18” or “G46-7”.

3) If OK, then check resistance between “YEL/BLK” wire 

terminal of combination meter connector “G28” and 
“G47-18” terminal [A] or “G46-7” terminal [B] of SDM 
connector.

Special tool
(A):  09932–76010 

Is resistance 1 

Ω

 or less?

Substitute a known-
good SDM and recheck. 
If “AIR BAG” warning 
light remain lighting, 
replace combination 
meter.

“YEL/BLK” wire 
(between combination 
meter and SDM 
connector) open or 
short to ground.

Step

Action

Yes

No

(A)

[A]

[B]

“G47-18”

“G46-7”

I5JB0A820019-01

Air Bag System:  8B-21

“AIR BAG” Warning Light Does Not Come ON

S6JB0B8204008

Wiring Diagram
Refer to ““AIR BAG” Warning Light Comes ON Steady”.

CAUTION

!

 

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

 

Flow Test Description
Step 1: Check combination meter power feed circuit.
Step 2: Check “AIR BAG” warning light circuit.

Troubleshooting

NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.

 

Step

Action

Yes

No

1

1) Set parking brake.
2) Note combination meter when ignition switch is turned 

ON.

Does the “BRAKE” indicator (warning light) come ON?

Go to Step 2.

Check and correct the 
following possible 
cause. 

• Open circuit in 

“BLK/YEL” or “PPL/
RED” wire. 

• Short 

circuit between “BLK/
YEL” or “PPL/RED” and 
ground. 

• “METER” fuse 

blown.

2

1) Disconnect SDM connector “G46” or “G47”.
2) Note combination meter when ignition switch is turned 

ON.

Does the “AIR BAG” warning light come ON?

Substitute a known-
good SDM and recheck.

“YEL/BLK” circuit 
shorted to power circuit. 
If OK, replace 
combination meter.