2001 SUZUKI GRAND VITARA Owners Manual

10B-24 AIR BAG SYSTEM
DIAGNOSTIC FLOW TABLE
DTC B1015 :
[A] Fig. for STEP 1 and 2/[B] Fig. for STEP 2
Special tool
(A) : 09932-75020
(B) : 09932-75010 Step Action Yes No
1 1) With ignition switch OFF, disconnect passenger air
bag (inflator) module connector behind the glove box.
2) Check proper connection to passenger air bag (infla-
tor) module at terminals in “Q07” connector.
3) If OK then connect Special Tool (B) to passenger air
bag (inflator) module connector disconnected at the
step 1).
With ignition switch ON, is DTC B1015 current?Go to step 2. Ignition switch OFF.
Replace passenger air
bag (inflator) module
(Refer to PASSENGER
AIR BAG (INFLATOR)
MODULE in this sec-
tion).
2 1) With ignition switch OFF, disconnect SDM connector.
2) Check proper connection to SDM at terminals “Q01-7”
and “Q01-8”.
3) If OK then measure resistance between “Q01-7” and
“Q01-8” terminals with connected Special Tool (B).
Is resistance 4.5 Ω or less?Substitute a
known-good SDM
and recheck.Repair high resistance
or open in “YEL/RED” or
“YEL” wire circuit.
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.

AIR BAG SYSTEM 10B-25
DTC B1016:
[A] Fig. for STEP 1 and 2/[B] Fig. for STEP 2
Special tool
(A) : 09932-75020
(B) : 09932-75010 Step Action Yes No
1 1) With ignition switch OFF, disconnect passenger air
bag (inflator) module connector behind the glove box.
2) Check proper connection to passenger air bag (infla-
tor) module at terminals in “Q07” connector.
3) If OK then connect Special Tool (B) to passenger air
bag (inflator) module connector disconnected at the
step 1).
With ignition switch ON, is DTC B1016 current?Go to step 2. Ignition switch OFF.
Replace passenger air
bag (inflator) module
(Refer to PASSENGER
AIR BAG (INFLATOR)
MODULE in this section).
2 1) With ignition switch OFF, disconnect SDM connector.
2) Check proper connection to SDM at terminals “Q01-7”
and “Q01-8”.
3) If OK then measure resistance between “Q01-7” and
“Q01-8” terminals with connected Special Tool (B).
Is resistance 1.4 Ω or more?Substitute a
known-good
SDM and
recheck.Repair short from “YEL/
RED” wire circuit to “YEL”
wire circuit or from “YEL/
RED” or “YEL” wire cir-
cuit to other wire circuit.
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.

10B-26 AIR BAG SYSTEM
DTC B1018:
[A] Fig. for STEP 1, 2 and 3/[B] Fig. for STEP 2/[C] Fig. for STEP 3
Special tool
(A) : 09932-75020
(B) : 09932-75010 Step Action Yes No
1 1) With ignition switch OFF, disconnect passenger air
bag (inflator) module connector behind the glove box.
2) Check proper connection to passenger air bag (infla-
tor) module at terminals in “Q07” connector.
3) If OK then connect Special Tool (B) to passenger air
bag (inflator) module connector disconnected at the
step 1).
With ignition switch ON, is DTC B1018 current?Go to step 2. Ignition switch OFF.
Replace passenger air
bag (inflator) module
(Refer to PASSENGER
AIR BAG (INFLATOR)
MODULE in this section).
2 1) With ignition switch OFF, disconnect Special Tool (B)
and SDM connector.
2) Measure resistance between “Q01-7” terminals and
body ground.
Is circuit open?Go to step 3. Repair short from “YEL/
RED” wire circuit to
ground.
3 1) Measure resistance between “Q01-8” terminal and
body ground.
Is circuit open?Substitute a
known-good
SDM and
recheck.Repair short from “YEL”
wire circuit to ground.
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.

AIR BAG SYSTEM 10B-27
DTC B1019:
[A] Fig. for STEP 1, 2 and 3/[B] Fig. for STEP 2/[C] Fig. for STEP 3
Special tool
(A) : 09932-75020
(B) : 09932-75010 Step Action Yes No
1 1) With ignition switch OFF, disconnect passenger
air bag (inflator) module connector behind the
glove box.
2) Check proper connection to passenger air bag
(inflator) module at terminals in “Q07” connector.
3) If OK then connect Special Tool (B) to passenger
air bag (inflator) module connector disconnected
at the step 1).
With ignition switch ON, is DTC B1019 current?Go to step 2. Ignition switch OFF.
Replace passenger air
bag (inflator) module
(Refer to PASSENGER
AIR BAG (INFLATOR)
MODULE in this section).
2 1) With ignition switch OFF, disconnect Special Tool
(B) and SDM connector.
2) Measure voltage from “Q01-7” terminal to body
ground.
With ignition switch ON, is voltage 1 V or less?Go to step 3. Repair short from “YEL/
RED” wire circuit to power
circuit.
3 1) Measure voltage from “Q01-8” terminal to body
ground.
With ignition switch ON, is voltage 1 V or less?Substitute a known-
good SDM and
recheck.Repair short from “YEL”
wire circuit to power cir-
cuit.
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.

10B-28 AIR BAG SYSTEM
DTC B1021 – Driver Air Bag Initiator Circuit Resistance High
DTC B1022 – Driver Air Bag Initiator Circuit Resistance Low
DTC B1024 – Driver Air Bag Initiator Circuit Short to Ground
DTC B1025 – Driver Air Bag Initiator Circuit Short to Power Circuit
WIRING DIAGRAM
DTC WILL SET WHEN
DTC B1021 :
The combined resistance of the driver air bag (inflator) module, contact coil assembly, harness wiring and con-
nector terminal contact is above a specified value for specified time.
DTC B1022 :
The combined resistance of the driver air bag (inflator) module, contact coil assembly, harness wiring and con-
nector terminal contact is below a specified value for specified time.
DTC B1024 :
The voltage measured at driver air bag initiator circuit is below a specified value for specified time.
DTC B1025 :
The voltage measured at driver air bag initiator circuit is above a specified value for specified time.
TABLE TEST DESCRIPTION
DTC B1021, B1022, B1024 and B1025 :
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 in air bag harness.
STEP 3 : Check whether malfunction is in contact coil or driver air bag (inflator) module.
[A] : Shorting bar 2. Ignition switch 5. Contact coil assembly
[B] : Airbag harness 3.“AIR BAG” fuse 6. Driver air bag (inflator) module
1. From main fuse 4. SDM 7. Ground for air bag system
1
2BLU/RED BLU/BLK
3
7
BLK
“Q01” Q01-4
Q01-17IG
GND4
[A]
[B]
GRN/RED
GRN Q01-10
Q01-9 D- D+“Q06”
“Q01”
“Q05”6
5
CAUTION:
Be sure to perform AIR BAG DIAGNOSTIC SYSTEM CHECK before starting diagnosis according to
flow table.
When measurement of resistance or voltage is required in this table, use a tester along with a cor-
rect terminal adapter from special tool (Connector test adapter kit).
When a check for proper connection is required, refer to INTERMITTENT AND POOR CONNEC-
TIONS in this section.
If there is open circuit in the air bag wire harness, connector or terminal is found damaged, replace
the wire harness, connector and terminal as an assembly.

AIR BAG SYSTEM 10B-29
DIAGNOSTIC FLOW TABLE
DTC B1021 :
[A] Fig. for STEP 1 and 2/[B] Fig. for STEP 2/[C] Fig. for STEP 3
Special tool
(A) : 09932-75020
(B) : 09932-75010 Step Action Yes No
1 1) With ignition switch OFF, disconnect contact coil con-
nector located near the base of the steering column.
2) Check proper connection to contact coil at terminals
in “Q06” connector.
3) If OK then connect Special Tool (B) to contact coil
connector disconnected at step 1).
With ignition switch ON, is DTC B1021 current?Go to step 2. Go to step 3.
2 1) With ignition switch OFF, disconnect SDM connector.
2) Check proper connection to SDM at terminals “Q01-9”
and “Q01-10”.
3) If OK then measure resistance between “Q01-9” and
“Q01-10” terminals with connected Special Tool (B).
Is resistance 4.5 Ω or less?Substitute a known-
good SDM and
recheck.Repair high resis-
tance or open in
“GRN” or “GRN/RED”
wire circuit.
3 1) With ignition switch OFF, disconnect Special Tool (B)
then reconnect contact coil connector located near
the base of the steering column.
2) Remove driver air bag (inflator) module from steering
wheel (Refer to DRIVER AIR BAG (INFLATOR)
MODULE in Section 3C1).
3) Check proper connection to driver air bag (inflator)
module at terminals in “Q05” connector.
4) If OK then connect Special Tool (B) to “Q05” connec-
tor.
With ignition switch ON, is DTC B1021 current?Ignition switch OFF.
Replace contact coil
assembly (Refer to
COMBINATION
SWITCH/CON-
TACT COIL AND
COMBINATION
SWITCH ASSEM-
BLY in Section
3C1).Ignition switch OFF.
Replace driver air
bag (inflator) module
(Refer to DRIVER
AIR BAG (INFLA-
TOR) MODULE in
Section 3C1).
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.

10B-30 AIR BAG SYSTEM
DTC B1022 :
[A] Fig. for STEP 1 and 2/[B] Fig. for STEP 2/[C] Fig. for STEP 3
Special tool
(A) : 09932-75020
(B) : 09932-75010 Step Action Yes No
1 1) With ignition switch OFF, disconnect contact coil con-
nector located near the base of the steering column.
2) Check proper connection to contact coil at terminals
in “Q06” connector.
3) If OK then connect Special Tool (B) to contact coil
connector disconnected at step 1).
With ignition switch ON, is DTC B1022 current?Go to step 2. Go to step 3.
2 1) With ignition switch OFF, disconnect SDM connector.
2) Check proper connection to SDM at terminals “Q01-9”
and “Q01-10”.
3) If OK then measure resistance between “Q01-9” and
“Q01-10” terminals with connected Special Tool (B).
Is resistance 1.7 Ω or more?Substitute a known-
good SDM and
recheck.Repair short from
“GRN” wire circuit to
“GRN/RED” wire cir-
cuit or from “GRN” or
“GRN/RED” wire cir-
cuit to other wire cir-
cuit.
3 1) With ignition switch OFF, disconnect Special Tool (B)
then reconnect contact coil connector located near
the base of the steering column.
2) Remove driver air bag (inflator) module from steering
wheel (Refer to DRIVER AIR BAG (INFLATOR)
MODULE in Section 3C1).
3) Check proper connection to driver air bag (inflator)
module at terminals in “Q05” connector.
4) If OK then connect Special Tool (B) to “Q05” connec-
tor.
With ignition switch ON, is DTC B1022 current?Ignition switch OFF.
Replace contact coil
assembly (Refer to
COMBINATION
SWITCH/CON-
TACT COIL AND
COMBINATION
SWITCH ASSEM-
BLY in Section
3C1).Ignition switch OFF.
Replace driver air
bag (inflator) module
(Refer to DRIVER
AIR BAG (INFLA-
TOR) MODULE in
Section 3C1).
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.

AIR BAG SYSTEM 10B-31
DTC B1024 :
[A] Fig. for STEP 1 and 2/[B] Fig. for STEP 2/[C] Fig. for STEP 3
Special tool
(A) : 09932-75020
(B) : 09932-75010 Step Action Yes No
1 1) With ignition switch OFF, disconnect contact coil
connector located near the base of the steering col-
umn.
2) Check proper connection to contact coil at terminals
in “Q06” connector.
3) If OK then connect Special Tool (B) to contact coil
connector disconnected at step 1).
With ignition switch ON, is DTC B1024 current?Go to step 2. Go to step 3.
2 1) With ignition switch OFF, disconnect Special Tool
(B) and SDM connector.
2) Measure resistance between “Q01-9” terminal and
body ground and between “Q01-10” terminal and
body ground.
Are circuits open?Substitute a known-
good SDM and
recheck.Repair short from
“GRN” or “GRN/RED”
wire circuit to ground.
3 1) With ignition switch OFF, disconnect Special Tool
(B) then reconnect contact coil connector located
near the base of the steering column.
2) Remove driver air bag (inflator) module from steer-
ing wheel (Refer to DRIVER AIR BAG (INFLATOR)
MODULE in Section 3C1).
3) Check proper connection to driver air bag (inflator)
module at terminals in “Q05” connector.
4) If OK then connect Special Tool (B) to “Q05” con-
nector.
With ignition switch ON, is DTC B1024 current?Ignition switch OFF.
Replace contact coil
assembly (Refer to
COMBINATION
SWITCH/CONTACT
COIL AND COMBI-
NATION SWITCH
ASSEMBLY in Sec-
tion 3C1).Ignition switch OFF.
Replace driver air bag
(inflator) module
(Refer to DRIVER AIR
BAG (INFLATOR)
MODULE in Section
3C1).
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.