Suzuki Grand Vitara JB416 / JB420. Manual - part 319

8B-72 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.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.

 

DTC B1321 / B1325: Left / Right Side-Air Bag Initiator Circuit Resistance High

S5JB0A8204030

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 side-air bag (inflator) module (left or right), harness wiring and connector terminal 
contact is above a specified value for specified time.

Flow Test Description
Step 1: Check whether malfunction is in side-air bag (inflator) module.
Step 2: Check side-air bag initiator circuit in floor harness.
Step 3: Check side-air bag initiator circuit in seat harness.

3

Check side-sensor referring to “Side-Sensor Inspection”.

Is it in good condition?

Substitute a known-
good SDM and recheck.

Replace side-sensor 
referring to “Side-
Sensor Removal and 
Installation”. If DTC still 
exists, substitute a 
known-good SDM and 
recheck.

Step

Action

Yes

No

BLK

G46-16 GND

“G46”

1

2

4

3

RED

BLK/YEL

“G01”

G46-11

IG

“L33”

GRY/RED

GRY

BRN/WHT

BRN

“L25”

“L30”

L33-1

L33-2

L33-4

L33-3

RS-

RS+

LS-

LS+

BLU

BLU

BLK

BLK

[A]

8

5

6

7

“Q02”

“Q03”

I5JB0A820044-01

[A]: Shorting bar

3. “A/B” fuse

6. Left side-air bag (inflator) module

1. From main fuse

4. Junction block assembly

7. Right side-air bag (inflator) module

2. Ignition switch

5. SDM

8. Ground for air bag system

Air Bag System:  8B-73

DTC Troubleshooting

Step

Action

Yes

No

1

1) With ignition switch OFF, disconnect side-air bag 

(inflator) module connector under front seat cushion.

2) Check proper connection to left or right side-air bag 

(inflator) module at terminals in “L25” or “L30” connector.

3) If OK, then connect special tools (B) and (C) to side-air 

bag (inflator) module connector disconnected at the Step 
1).

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

4) Check SDM DTC.

With ignition switch ON, is DTC B1321 or B1325 still 
indicated?

Go to Step 2.

Go to Step 3.

“L25”, “L30”

(C)

(B)

STEERING WHEEL

I4RS0A820032-01

8B-74 Air Bag System: 

2

1) With ignition switch OFF, disconnect SDM connector 

“L33”.

2) Check proper connection to SDM at terminals “L33-1” 

and “L33-2” or “L33-3” and “L33-4”.

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

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

4) Measure resistance between “L33-1” and “L33-2” 

terminals (for DTC B1321) or “L33-3” and “L33-4” 
terminals (for DTC B1325) with connected special tool 
(B) and (C).

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

Is resistance 5.5 

Ω

 or less?

Substitute a known-
good SDM and recheck.

DTC B1321: Repair 
high resistance or open 
in “GRY/RED” or “GRY” 
wire circuit in floor 
harness.
DTC B1325: Repair 
high resistance or open 
in “BRN/WHT” or “BRN” 
wire circuit in floor 
harness.

Step

Action

Yes

No

(A)

“L25”, “L30”

(C)

(B)

STEERING WHEEL

“L33-1”

“L33-2”

“L33-3 ”

“L33-4”

1, (A)

I5JB0A820045-01

Air Bag System:  8B-75

NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components, 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) then reconnect connector “L25” or “L30”.

2) Disconnect side-air bag (inflator) module connector 

“Q02” or “Q03” from side-air bag (inflator) module.

3) Check proper connection to side-air bag (inflator) 

module at terminal in connector.

4) If OK, then connect special tools (A), (B) and (C) to side-

air bag (inflator) connector.

Special tool
(A):  09932–76010
(B):  09932–75010
(D):  09932–78310

5) Check SDM DTC.

With ignition switch ON, is DTC B1321 or B1325 still 
indicated?

DTC B1321: Repair 
high resistance or open 
in “GRY/RED” or “GRY” 
wire circuit in seat 
harness.
DTC B1325: Repair 
high resistance or open 
in “BRN/WHT” or “BRN” 
wire circuit in seat 
harness.

Replace side-air bag 
(inflator) module 
referring to “Side-Air 
Bag (Inflator) Module 
Removal and 
Installation”.

Step

Action

Yes

No

“L25”, “L30”

STEERING WHEEL

(B)

(D)

(A)

“Q02”, “Q03”

I5JB0A820046-02