Page 726 of 801
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1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B
4. ªAIR BAGº warning lamp in combination meter7. Connection detection pin
8. SDM
8-1. ªAIR BAGº warning lamp driver circuit -5. ªAIR BAGº fuse in ªAIR BAGº fuse box
-6. ªAIR BAGº monitor coupler
6-1. Diagnosis switch terminal : Air bag harness
6±1 6
10B-20 AIR BAG SYSTEM
TABLE C ± ªAIR BAGº WARNING LAMP FLASHES (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.
STEPACTIONYESNO
11) Check ªAIR BAGº monitor coupler.
2) Is it connected diagnosis switch terminal and
ground terminal in ªAIR BAGº monitor coupler
by service wire?Remove service wire.Go to step 2.
21) With ignition switch OFF, disconnect SDM.
2) Measure resistance between ªA8º terminal of
SDM connector and body ground.
3) Is resistance 1 k or more?Substitute a known-good
SDM and recheck.Repair short from ªVº
wire circuit to ground.
Page 728 of 801
YH4
GRAND
VITARA
1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B
4. ªAIR BAGº warning lamp in combination lamp
5. ªAIR BAGº fuse in ªAIR BAGº fuse box6. DLC
7. To, ICM (if equipped)
8. Connection detection pin
9. SDM
9-1. ªAIR BAGº warning lamp driver circuit : Air bag harness
10B-22 AIR BAG SYSTEM
TABLE D ± SDM CANNOT COMMUNICATE THROUGH THE SERIAL DATA 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.
STEPACTIONYESNO
11) Make sure that scan tool (Tech 1) is free
from malfunction and correct cartridge for
air bag system is used.
2) Ignition switch OFF.
3) Check proper connection of scan tool
(Tech 1) to DLC.
4) Is connection in good condition?Go to step 2 on
next page.Properly connect scan
tool to DLC.
Page 729 of 801
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1. DLC
2. Scan tool1. ªW/Bº wire terminal
AIR BAG SYSTEM 10B-23
TABLE D ± SDM CANNOT COMMUNICATE THROUGH THE SERIAL DATA CIRCUIT
(Page 2 of 2)
STEPACTIONYESNO
21) Check if communication is possible by
trying communication with other
controller (ECM (or PCM), ICM or ABS
controller).
2) Is it possible to communicate with other
controller?Go to step 3.Repair open in common
section of serial data circuit
(ªW/Bº wire circuit) used by
all controllers or short to
ground or power circuit
which has occurred some-
where in serial data circuit
(ªW/Bº wire circuit).
31) With ignition switch OFF, disconnect
SDM and ªLamp, DLC and Monitor
Coupler Groundº (ªEº) connector.
2) Check proper connection at ªW/Bº wire
terminal for DLC in ªEº connector.
3) If OK, then check resistance between
ªW/Bº wire terminal in ªEº connector and
ªA4º terminal of SDM connector.
4) Is resistance 1 or less?Substitute a known-good
SDM and recheck.Repair high resistance or
open in ªW/Bº wire circuit
(in air bag harness).
Fig. for STEP 1 Fig. for STEP 3
Special Tool
(A): 09932-76010
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) Repeat ªAir Bag Diagnostic System Check Flow Tableº, referring to p.10B-11 to confirm that the trouble
has been corrected.
Page 730 of 801
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VITARA
1. SDM
2. Passenger air bag (inflator) module: Shorting bar
: Air bag harness
10B-24 AIR BAG SYSTEM
CODE 15 ± PASSENGER 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 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 passenger air bag (inflator) module, harness wiring and connector terminal contact
is above a specified value for specified time.
Page 732 of 801
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VITARA
1. SDM
2. Passenger air bag (inflator) module: Shorting bar
: Air bag harness
10B-26 AIR BAG SYSTEM
CODE 16 ± PASSENGER 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 passenger air bag (inflator) module, harness wiring and connector terminal contact
is below a specified value for specified time.
Page 734 of 801
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VITARA
1. SDM
2. Passenger air bag (inflator) module : Shorting bar
: Air bag harness
10B-28 AIR BAG SYSTEM
CODE 18 ± PASSENGER 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 passenger air bag initiator circuit is below a specified value for specified time.
Page 736 of 801
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VITARA
1. From ignition switch
2. ªAIR BAGº fuse in ªAIR BAGº fuse box
3. SDM
4. Passenger air bag (inflator) module: Shorting bar
: Air bag harness
10B-30 AIR BAG SYSTEM
CODE 19 ± PASSENGER 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 passenger air bag initiator circuit is above a specified value for specified time.
Page 738 of 801
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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.
