Suzuki Grand Vitara JB416 / JB420. Manual — part 304

8B-12 Air Bag System:

Diagnostic Information and Procedures

Air Bag Diagnostic System Check

S5JB0A8204001

WARNING

!

To avoid deployment when troubleshooting
the air bag system, do not use electrical test
equipment such as a battery powered or AC
powered voltmeter, ohmmeter, etc., or any
type of electrical equipment other than that
specified in this manual. Do not use a non-
powered probe type tester.
Instructions in this manual must be followed
carefully, otherwise personal injury may
result.

CAUTION

!

The order in which DTCs are diagnosed is
very important. Failure to diagnose the DTCs
in the order specified may result in extended
diagnostic time, incorrect diagnosis and
incorrect parts replacement.

The diagnostic procedures used are designed to find
and repair air bag system malfunctions.

To get the best results, it is important to use the
diagnostic flow and follow the sequence in the following.

1) Perform the “Air Bag Diagnostic System Check

Flow”.
(The “Air Bag Diagnostic System Check Flow” must
be the starting point of any air bag system diagnosis.
The “Air Bag Diagnostic System Check Flow” checks
for proper “AIR BAG” warning lamp operation
through “AIR BAG” warning lamp and whether air
bag DTCs exist.)

2) Refer to the proper diagnostic flow as directed by the

“Air Bag Diagnostic System Check Flow”.
(The “Air Bag Diagnostic System Check Flow” will
lead you to the correct flow to diagnose any air bag
system malfunctions. Bypassing these procedures
may result in extended diagnostic time, incorrect
diagnosis and incorrect parts replacement.)

3) Repeat the “Air Bag Diagnostic System Check Flow”

after any repair or diagnostic procedures have been
performed.
(Performing the “Air Bag Diagnostic System Check
Flow” after all repair or diagnostic procedures will
ensure that the repair has been made correctly and
that no other malfunctions exist.)

Air Bag Diagnostic System Check Flow

S5JB0A8204002

CAUTION

!

• Be sure to perform “Air Bag Diagnostic System Check” before starting diagnosis according to each

flow.

• When measurement of resistance or voltage is required in the flow, use a tester along with a correct

terminal adapter from special tool (Connector test adapter kit).

• When a check for proper connection is required, refer to “Inspection of Intermittent and Poor

Connections”.

• If an open circuit in the air bag wire harness damaged, connector or terminal is found, replace the

wire harness, connectors and terminals as an assembly.

Flow test description
Step 1: Check “AIR BAG” warning lamp and circuits.
Step 2: Check that “AIR BAG” warning lamp lights.
Step 3: Check diagnosis switch circuit.
Step 4: Check that “AIR BAG” warning lamp flashes 6 times after ignition switch is turned ON.
Step 6: Check that history code(s) is in SDM memory. (using SUZUKI scan tool)
Step 7: Check that history code(s) is in SDM memory. (using monitor coupler)
Step 9: Check that current code is in SDM memory. (using SUZUKI scan tool)
Step 10: Check that current code is in SDM memory. (using monitor coupler)

5. Forward-sensor

12. Seat belt pretensioner

: 9 N

⋅m (0.9 kgf-m, 6.5 lb-ft)

6. “A/B” fuse in junction block assembly

13. Side curtain-air bag (inflator) module (if equipped)

: 6 N

⋅m (0.6 kgf-m, 4.5 lb-ft)

7. Air bag harness in floor harness

14. Air bag harness in instrument panel harness

: 11 N

⋅m (1.1 kgf-m, 8.0 lb-ft)

Air Bag System: 8B-13

Step

Action

Yes

No

1

1) Make sure that battery voltage is about 11 V or higher.
2) Note “AIR BAG” warning lamp as ignition switch is

turned ON.

Does “AIR BAG” warning lamp come ON when ignition
switch is turned ON?

Go to Step 2.

Proceed to ““AIR BAG”
Warning Lamp Does
Not Come ON”.

2

Does “AIR BAG” warning lamp come ON steady?

Proceed to ““AIR BAG”
Warning Lamp Comes
ON Steady”.

Go to Step 3.

3

Does “AIR BAG” warning lamp keep flashing (indicating
DTC) when ignition switch is ON?

Proceed to ““AIR BAG”
Warning Lamp
Flashes”.

Go to Step 4.

4

Does “AIR BAG” warning lamp turn OFF, after flashing 6
times?

“AIR BAG” warning
lamp circuit is in good
condition. Go to Step 5.

“AIR BAG” warning
lamp circuit is in good
condition. Go to Step 8.

5

Do you have SUZUKI scan tool?

Go to step 6.

Go to step 7.

6

Check DTC referring to “DTC Check” using SUZUKI scan
tool.

Is “NO CODES” displayed on SUZUKI scan tool?

Air bag system is in
good condition.

An intermittent trouble
has occurred at some
place.
Check the connector
harness, etc. related to
the sensed DTC.
Refer to “Inspection of
Intermittent and Poor
Connections”.
Then clear DTC
(referring to “DTC
Clearance”.) and repeat
this flow.

7

1) Check DTC referring to “DTC Check” using monitor

connector (if equipped).

Is flashing pattern DTC No. 0000 indicated on “AIR BAG”
warning lamp?

Air bag system is in
good condition.

An intermittent trouble
has occurred at some
place.
Check the connector
harness, etc. related to
the sensed DTC.
Refer to “Inspection of
Intermittent and Poor
Connections”.
Then clear DTC
(referring to “DTC
Clearance”.) and repeat
this flow.

8

Do you have SUZUKI scan tool?

Go to step 9.

Go to step 10.

9

Check DTC referring to “DTC Check” using SUZUKI scan
tool.

Is “NO CODES” displayed on SUZUKI scan tool?

Substitute a known-
good SDM and recheck.

Check and repair
according to flow
corresponding to that
DTC.

10 Check DTC referring to “DTC Check” using monitor

connector (if equipped).

Is flashing pattern DTC No. 0000 indicated on “AIR BAG”
warning lamp?

Substitute a known-
good SDM and recheck.

Check and repair
according to flow
corresponding to that
DTC.

8B-14 Air Bag System:

DTC Table

S5JB0A8204003

SDM DTC

DTC

“AIR BAG” warning lamp

flashing pattern

Diagnosis

No.

Mode

—

0000

Normal

—

)

B1013 1013

SDM

SDM fault

Diagnose trouble
according to
diagnostic flow
corresponding to
each code No.

)

B1016 1016

Power source voltage

Too high

)

B1017 1017

Too Low

)

B1021 1021

SDM

Air bag module exploded

)

B1031 1031

Driver air bag circuit

Resistance high

)

B1032 1032

Resistance low

)

B1033 1033

Short to ground

)

B1034 1034

Short to power circuit

)

B1041 1041

Passenger air bag
circuit

Resistance high

)

B1042 1042

Resistance low

)

B1043 1043

Short to ground

)

B1044 1044

Short to power circuit

)

B1051 1051

Driver pretensioner
circuit

Resistance high

)

B1052 1052

Resistance low

)

B1053 1053

Short to ground

)

B1054 1054

Short to power circuit

)

B1055 1055

Passenger
pretensioner circuit

Resistance high

)

B1056 1056

Resistance low

)

B1057 1057

Short to ground

)

B1058 1058

Short to power circuit

)

B1073 1073

Driver forward-sensor
circuit

Short to ground

)

B1074 1074

Short to power circuit or open

)

B1077 1077

Passenger forward-
sensor circuit

Short to ground

)

B1078 1078

Short to power circuit or open

)

B1085 1085

Side-sensor

Wrong assembly

MCODEB0000-0-01

MCODEB1013-0-01

MCODEB1016-0-01

MCODEB1017-0-01

MCODEB1021-0-01

MCODEB1031-0-01

MCODEB1032-0-01

MCODEB1033-0-01

MCODEB1034-0-01

MCODEB1041-0-01

MCODEB1042-0-01

MCODEB1043-0-01

MCODEB1044-0-01

MCODEB1051-0-01

MCODEB1052-0-01

MCODEB1053-0-01

MCODEB1054-0-01

MCODEB1055-0-01

MCODEB1056-0-01

MCODEB1057-0-01

MCODEB1058-0-01

MCODEB1073-0-01

MCODEB1074-0-01

MCODEB1077-0-01

MCODEB1078-0-01

MCODEB1085-0-01

Air Bag System: 8B-15

)

B1086 1086

Left side-sensor

Performance problem

Diagnose trouble
according to
diagnostic flow
corresponding to
each code No.

)

B1087 1087

Communication error

)

B1096 1096

Right side-sensor

Performance problem

)

B1097 1097

Communication error

)

B1321 1321

Left side-air bag

Resistance high

)

B1322 1322

Resistance low

)

B1323 1323

Short to ground

)

B1324 1324

Short to power circuit

)

B1325 1325

Right side-air bag

Resistance high

)

B1326 1326

Resistance low

)

B1327 1327

Short to ground

)

B1328 1328

Short to power circuit

)

B1331 1331

Left side curtain-air
bag circuit

Resistance high

)

B1332 1332

Resistance low

)

B1333 1333

Short to ground

)

B1334 1334

Short to power circuit

)

B1335 1335

Right side curtain-air
bag circuit

Resistance high

)

B1336 1336

Resistance low

)

B1337 1337

Short to ground

)

B1338 1338

Short to power circuit

DTC

“AIR BAG” warning lamp

flashing pattern

Diagnosis

No.

Mode

MCODEB1086-0-01

MCODEB1087-0-01

MCODEB1096-0-01

MCODEB1097-0-01

MCODEB1321-0-01

MCODEB1322-0-01

MCODEB1323-0-01

MCODEB1324-0-01

MCODEB1325-0-01

MCODEB1326-0-01

MCODEB1327-0-01

MCODEB1328-0-01

MCODEB1331-0-01

MCODEB1332-0-01

MCODEB1333-0-01

MCODEB1334-0-01

MCODEB1335-0-01

MCODEB1336-0-01

MCODEB1337-0-01

MCODEB1338-0-01