Page 738 of 801
YH4
GRAND
VITARA
: Shorting bar
: Air bag harness
1. SDM
2. Contact coil assembly
3. Driver air bag (inflator) module
10B-32 AIR BAG SYSTEM
CODE 21 ± DRIVER AIR BAG INITIATOR CIRCUIT RESISTANCE HIGH (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittents and Poor Connectionsº in
this section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
DTC WILL SET WHEN:
The combined resistance of the driver air bag (inflator) module, contact coil assembly, harness wiring and connec-
tor terminal contact is above a specified value for specified time.
NOTE:
Before executing items in this table, be sure to perform ªAir Bag Diagnostic Check Flow Tableº.
STEP
ACTIONYESNO
11) With ignition switch OFF, disconnect contact
coil connector located near the base of the
steering column.
2) Check proper connection to contact coil at
terminals in ªCº connector.
3) If OK then connect Special Tool (B) to contact
coil connector disconnected at step 1).
4) With ignition switch ON, is DTC 21 current?Go to step 2.Go to step 3 on the
next page.
21) With ignition switch OFF, disconnect SDM.
2) Check proper connection to SDM at terminals
ªA6º and ªA7º.
3) Release shorting bar in SDM connector,
referring to the figure below.
4) If OK then measure resistance between ªA6º
and ªA7º terminals with connected Special Tool
(B).
5) Is resistance 3.5 or less?Substitute a known-
good SDM and
recheck.Repair high resistance
or open in ªGº or ªG/Rº
wire circuit.
Page 740 of 801
YH4
GRAND
VITARA
: Shorting bar
: Air bag harness
1. SDM
2. Contact coil assembly
3. Driver air bag (inflator) module
10B-34 AIR BAG SYSTEM
CODE 22 ± DRIVER AIR BAG INITIATOR CIRCUIT RESISTANCE LOW (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
DTC WILL SET WHEN:
The combined resistance of the driver air bag (inflator) module, contact coil assembly, harness wiring and connec-
tor terminal contact is below a specified value for specified time.
NOTE:
Before executing items in this table, be sure to perform ªAir Bag Diagnostic Check Flow Tableº.
STEP
ACTIONYESNO
11) With ignition switch OFF, disconnect contact
coil connector located near the base of the
steering column.
2) Check proper connection to contact coil at
terminals in ªCº connector.
3) If OK then connect Special Tool (B) to contact
coil connector disconnected at step 1).
4) With ignition switch ON, is DTC 22 current?Go to step 2.Go to step 3 on the
next page.
21) With ignition switch OFF, disconnect SDM.
2) Check proper connection to SDM at terminals
ªA6º and ªA7º.
3) Release shorting bar in SDM connector,
referring to the figure below.
4) If OK then measure resistance between ªA6º
and ªA7º terminals with connected Special Tool
(B).
5) Is resistance 1.7 or more?Substitute a known-
good SDM and
recheck.Repair short from ªGº
wire circuit to ªG/Rº wire
circuit or from ªGº or
ªG/Rº wire circuit to
other wire circuit.
Page 742 of 801
YH4
GRAND
VITARA
: Shorting bar
: Air bag harness
1. SDM
2. Contact coil assembly
3. Driver air bag (inflator) module
10B-36 AIR BAG SYSTEM
CODE 24 ±DRIVER AIR BAG INITIATOR CIRCUIT SHORT TO GROUND (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
DTC WILL SET WHEN:
The voltage measured at driver air bag initiator circuit is below a specified value for specified time.
NOTE:
Before executing items in this table, be sure to perform ªAir Bag Diagnostic Check Flow Tableº.
STEP
ACTIONYESNO
11) With ignition switch OFF, disconnect contact
coil connector located near the base of the
steering column.
2) Check proper connection to contact coil at
terminals in ªCº connector.
3) If OK then connect Special Tool (B) to contact
coil connector disconnected at step 1).
4) With ignition switch ON, is DTC 24 current?Go to step 2.Go to step 3 on the
next page.
21) With ignition switch OFF, disconnect Special
Tool (B) and SDM.
2) Measure resistance between ªA6º and ªA10º
terminals.
3) Is resistance 1 k or more?Substitute a known-
good SDM and recheck.Repair short from ªGº or
ªG/Rº wire circuit to
ground.
Page 744 of 801
YH4
GRAND
VITARA
: Shorting bar
: Air bag harness
1. From ignition switch
2. ªAIR BAGº fuse in ªAIR BAGº fuse box
3. SDM
4. Contact coil assembly
5. Driver air bag (inflator) module
10B-38 AIR BAG SYSTEM
CODE 25 ± DRIVER AIR BAG INITIATOR CIRCUIT SHORT TO POWER CIRCUIT (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
DTC WILL SET WHEN:
The voltage measured at driver air bag initiator circuit is above a specified value for specified time.
NOTE:
Before executing items in this table, be sure to perform ªAir Bag Diagnostic Check Flow Tableº.
STEP
ACTIONYESNO
11) With ignition switch OFF, disconnect contact
coil connector located near the base of the
steering column.
2) Check proper connection to contact coil at
terminals in ªCº connector.
3) If OK then connect Special Tool (B) to contact
coil connector disconnected at step 1).
4) With ignition switch ON, is DTC 25 current?Go to step 2.Go to step 3 on the
next page.
21) With ignition switch OFF, disconnect Special
Tool (B) and SDM.
2) Measure voltage from ªA7º terminal to body
ground.
3) With ignition switch ON, is voltage 1 V or less?Substitute a known-
good SDM and
recheck.Repair short from ªGº or
ªG/Rº wire circuit to
power circuit.
Page 746 of 801
YH4
GRAND
VITARA
: Air bag harness
1. From main fuse
2. Ignition switch
3. ªAIR BAGº fuse in ªAIR BAGº fuse box
4. SDM
10B-40 AIR BAG SYSTEM
CODE 31 ± POWER SOURCE VOLTAGE HIGH (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
DTC WILL SET WHEN:
The power source voltage to SDM is above specified value for specified time.
Page 748 of 801
YH4
GRAND
VITARA
1. From main fuse
2. Ignition switch
3. ªAIR BAGº fuse in ªAIR BAGº fuse box
4. SDM : Air bag harness
10B-42 AIR BAG SYSTEM
CODE 32 ± POWER SOURCE VOLTAGE LOW (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
DTC WILL SET WHEN:
The power source voltage is below an approx. 8 V for specified time.
Page 750 of 801
YH4
GRAND
VITARA
1. SDM
2. Passenger seat belt pretensioner
3. Driver seat belt pretensioner
: Shorting bar
: Air bag harness
10B-44 AIR BAG SYSTEM
CODE 41 ± DRIVER PRETENSIONER INITIATOR CIRCUIT RESISTANCE HIGH
CODE 45 ± PASSENGER PRETENSIONER INITIATOR CIRCUIT RESISTANCE HIGH
(Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
DTC WILL SET WHEN:
The resistance of driver or passenger seat belt pretensioner initiator circuit is above a specified value for specified
time.
Page 751 of 801
YH4
GRAND
VITARA (A)
For DTC 45
ªA11º
ªA12º
(A)
For DTC 41
STEERING WHEEL 1. Pretensioner
harness
EXAMPLE: For driver side
AIR BAG SYSTEM 10B-45
CODE 41 ± DRIVER PRETENSIONER INITIATOR CIRCUIT RESISTANCE HIGH
CODE 45 ± PASSENGER PRETENSIONER INITIATOR CIRCUIT RESISTANCE HIGH
(Page 2 of 2)
NOTE:
Before executing items in this table, be sure to perform ªAir Bag Diagnostic Check Flow Tableº.
STEP
ACTIONYESNO
11) With ignition switch OFF, remove front
pillar lower trim of applicable side then
disconnect seat belt pretensioner
connector.
2) Check proper connection to applicable
seat belt pretensioner at terminals in ªGº
or ªHº connector.
3) If OK then connect Special Tool (B) to
seat belt pretensioner connector
disconnected at the step 1).
4) With ignition switch ON, is DTC 41 or
45 still current?Go to step 2.1) Ignition switch OFF.
2) Replace seat belt preten-
sioner (Refer to
SECTION 10A).
21) With ignition switch OFF, disconnect
SDM.
2) Check proper connection to SDM at
terminals ªA13º and ªA14º or ªA11º
and ªA12º.
3) If OK then measure resistance between
ªA13º and ªA14º terminals or ªA11º and
ªA12º terminals with connected Special
Tool (B).
4) Is resistance 2.9 or less?Substitute a known-
good SDM and recheck.DTC41:
Repair high resistance or
open in ªPº or ªWº wire
circuit.
DTC45:
Repair high resistance or
open in ªLgº or ªBrº wire
circuit.
Fig. for STEP 1 and 2 Fig. for STEP 2
Special Tool
(A): 09932-76010
(B): 09932-75010
NOTE:
Upon completion of inspection and repair work, perform following items.
1) Reconnect all air bag system components, ensure all components are properly mounted.
2) Clear diagnostic trouble codes (refer to ªDiagnostic Trouble Code (DTC) Clearanceº), if any.
3) Repeat ªAir Bag Diagnostic System Check Flow Tableº, referring to p.10B-11 to confirm that the trouble
has been corrected.
