Suzuki Grand Vitara JB416 / JB420 / JB419. Service manual - part 411

8B-29 Air Bag System: 

DTC B1031: Driver Air Bag Initiator Circuit Resistance High

S6JB0A8204015

Wiring Diagram

CAUTION

!

 

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

 

DTC Will Set when
The combined resistance of the driver air bag (inflator) module, contact coil assembly, harness wiring and connector 
terminal contact is above a specified value for specified time.

Flow Test Description
Step 1: Check whether malfunction is in contact coil and driver air bag (inflator) module or the others.
Step 2: Check driver air bag (inflator) module initiator circuit.
Step 3: Check whether malfunction is in contact coil or driver air bag (inflator) module.

BLK

G47-20 GND

“G47”

1

2

4

3

RED

BLK

RED

BLK/YEL

“G01”

G47-16

IG

[A]

GRN/RED

GRN

GRN/RED

GRN

“Q01”

G47-5

G47-6

D1+

D1-

[D] “G27”

[C] “G26”

G46-16 GND

“G46”

G46-11

IG

[B]

G46-2

G46-1

D1+

D1-

“G47”

“G46”

[E]

8

5

5

6

7

I5JB0A820025-01

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

[E]: Shorting bar

4. Junction block assembly

8. Ground for air bag system

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

1. From main fuse

5. SDM

[C]: For vehicle without cruise control system

2. Ignition switch

6. Contact coil assembly

[D]: For vehicle with cruise control system

3. “A/B” fuse

7. Driver air bag (inflator) module

Air Bag System:  8B-30

DTC Troubleshooting

Step

Action

Yes

No

1

1) With ignition switch OFF, disconnect contact coil 

connector located under of the steering column.

2) Check proper connection to contact coil at terminal in 

“G26” or “G27” connector.

3) If OK, then connect special tools (B) and (C) to “G26” 

connector (For vehicle without cruise control system [A]) 
or special tools (B) and (D) to “G27” connector (for 
vehicle with cruise control system [B]) disconnected in 
Step 1).

Special tool
(B):  09932–75010 
(C):  09932–78340
(D):  09932–77320 

4) Check SDM DTC.

With ignition switch ON, is DTC B1031 indicated?

Go to Step 2.

Go to Step 3.

(D)

“G27”

(B)

(C)

“G26”

BASE OF COLUMN

(B)

BASE OF COLUMN

[A]

[B]

DRIVER

PASSENGER

I5JB0A820026-02

8B-31 Air Bag System: 

2

1) With ignition switch OFF, disconnect SDM connector 

“G47” or “G46”.

2) Check proper connection to SDM at terminals “G47-5” 

and “G47-6” or “G46-1” and “G46-2”.

3) If OK, release shorting bar in SDM connector inserting 

release tool (1) included in special tool (A).

4) Measure resistance between “G47-5” and “G47-6” 

terminals [A] or between “G46-1” and “G46-2” terminals 
[B] with connected special tools (B) and (C) (for vehicle 
without cruise control system [C]) or special tools (B) 
and (D) (for vehicle with cruise control system [D]).

Special tool
(A):  09932–76010 
(B):  09932–75010 
(C):  09932–78340 
(D):  09932–77320

Is resistance 5.5 

Ω

 or less?

Substitute a known-
good SDM and recheck.

High resistance or open 
wire in “GRN/RED” or 
“GRN” circuit.

Step

Action

Yes

No

[C]

[D]

[A]

[B]

“G47-6”

“G46-2”

“G47-5”

“G46-1”

1, (A)

(A)

1, (A)

(D)

“G27”

(B)

(C)

“G26”

BASE OF COLUMN

(B)

BASE OF COLUMN

DRIVER

PASSENGER

I5JB0A820027-02

Air Bag System:  8B-32

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.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.

 

3

1) With ignition switch OFF, disconnect special tools (B) 

and (C) or (D) from “G26” or “G27” connector and then 
reconnect contact coil connector located under of the 
steering column.

2) Remove driver air bag (inflator) module from steering 

wheel referring to “Driver Air Bag (Inflator) Module 
Removal and Installation”.

3) Check proper connection to driver air bag (inflator) 

module connector.

4) If OK, then connect special tools (A), (B) and (E) to 

driver air bag (inflator) module connector.

Special tool
(A):  09932–76010 
(B):  09932–75010 
(C):  09932–78340
(D):  09932–77320 
(E):  09932–78310 

5) Check SDM DTC.

With ignition switch ON, is DTC B1031 indicated?

Turn ignition switch 
OFF. Replace contact 
coil assembly referring 
to “Contact Coil Cable 
Assembly Inspection in 
Section 6B”.

Turn ignition switch 
OFF. Replace driver air 
bag (inflator) module 
referring to “Driver Air 
Bag (Inflator) Module 
Removal and 
Installation”.

Step

Action

Yes

No

(A)

STEERING WHEEL

(B)

(E)

I5JB0A820028-01