wiring diagram SUZUKI GRAND VITARA 1999 2.G Workshop Manual

8E-2 CRUISE CONTROL SYSTEM
General Description
Cautions in Servicing
Refer to Section 8.
Symbols and Marks
Refer to Section 8A.
Abbreviations
Refer to Section 8A.
Wiring Color Symbols
Refer to Section 8.
Joint Connector
Refer to Section 8.
Fuse Box and Relay
Refer to Section 8A.
Power Supply Diagram
Refer to Section 8A.

AIR BAG SYSTEM 10B-1
10B
SECTION 10B
AIR BAG SYSTEM
CONTENTS
General Description ......................................10B-3
System Components and Wiring Location
View and Connectors .................................. 10B-4
System Wiring Diagram............................... 10B-5
Diagnosis .......................................................10B-6
Diagnostic Trouble Code (DTC) .................. 10B-6
Use of Special Tool ..................................... 10B-6
Intermittents and Poor Connections ............ 10B-8
Air Bag Diagnostic System Check............... 10B-9
Air Bag Diagnostic System Check Flow
Table ......................................................... 10B-10
DTC Check ................................................ 10B-11
DTC Clearance ......................................... 10B-12
DTC Table ................................................. 10B-14
Table A - “AIR BAG” Warning Lamp
Comes ON Steady .................................... 10B-16
Table B - “AIR BAG” Warning Lamp Does
Not Come ON ............................................ 10B-16
Table C - “AIR BAG” Warning Lamp
Flashes ...................................................... 10B-16Table D - “AIR BAG” Warning Lamp
Cannot Indicate Flashing Pattern of DTC . 10B-16
Table E - SDM Cannot Communicate
through The Serial Data Circuit................. 10B-21
DTC B1015 - Passenger Air Bag Initiator
Circuit Resistance High............................. 10B-23
DTC B1016 - Passenger Air Bag Initiator
Circuit Resistance Low ............................. 10B-23
DTC B1018 - Passenger Air Bag Initiator
Circuit Short to Ground ............................. 10B-23
DTC B1019 - Passenger Air Bag Initiator
Circuit Short to Power Circuit .................... 10B-23
DTC B1021 – Driver Air Bag Initiator
Circuit Resistance High............................. 10B-28
DTC B1022 – Driver Air Bag Initiator
Circuit Resistance Low ............................. 10B-28
DTC B1024 – Driver Air Bag Initiator
Circuit Short to Ground ............................. 10B-28
DTC B1025 – Driver Air Bag Initiator
Circuit Short to Power Circuit .................... 10B-28 WARNING:
Service on or around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Please observe all WARNINGS and “Service Precautions” under “On-
Vehicle Service” in this section before performing service on or around the air bag system compo-
nents or wiring. Failure to follow WARNINGS could result in unintended activation of the system or
could render the system inoperative. Either of these two conditions may result in severe injury.
The procedures in this section must be followed in the order listed to disable the air bag system
temporarily and prevent false diagnostic trouble codes from setting. Failure to follow procedures
could result in possible activation of the air bag system, personal injury or otherwise unneeded air
bag system repairs.
CAUTION:
When fasteners are removed, always reinstall them at the same location from which they were
removed. If a fastener needs to be replaced, use the correct part number fastener for that application.
If the correct part number fastener is not available, a fastener of equal size and strength (or stronger)
may be used. Fasteners that are not reused, and those requiring thread-locking compound, will be
called out. The correct torque value must be used when installing fasteners that require it. If the above
conditions are not followed, parts or system damage could result.
NOTE:
For the descriptions (items) not found in this section, refer to the same section of the Service Manual
mentioned in the FOREWORD of this manual.

AIR BAG SYSTEM 10B-5
System Wiring Diagram
TERMINAL ARRANGEMENT OF SDM (VIEWED FROM HARNESS SIDE)
CONNECTOR “Q01” (SDM connector)
1
2
35
4 BLK/BLUBLU/BLK BLU/RED
BLK/WHT
BLU BLUGRN/RED
GRN GRNWHT WHT
GRN
YEL/RED
YEL
PNK
WHT
BRN
LT GRN
6
12V
5V 5V PPL/RED
ORN/GRN
ORN/BLU
YEL/GRN
YEL/BLUORN/GRN
ORN/BLU
YEL/GRN
YEL/BLUORN/GRN
ORN/BLU
YEL/GRN
YEL/BLUPPL/RED
87
“G27”
“E12”18 17“Q02”
“Q11” “Q12”9
10PPL
BLK
“Q04”
Q01-2
Q01-4
Q01-20Q01-7
Q01-8 Q01-10
Q01-9
Q01-12
Q01-11
Q01-5
Q01-6
Q01-15
Q01-17L1
L2 IG
SDL
Q01-19
SL+
Q01-18
SL-
Q01-13
SR+
Q01-14
SR-
DNS
GNDLA
PP- PP+DP- DP+P- P+D- D+
“Q07”
“Q06”“Q01”“Q05”
15
161413
12 11
[A]
[B]
[C]
“Q01” “Q12”,“G03”, “G27”,“E12”
“Q01”
BLK/WHT
“Q03”
“G03”
[A]: Shorting bar 6. Connection detection pin 14. Passenger air bag (inflator) module
[B]: Air bag harness 7. To ECM, TCM (if equipped) and ABS control
module (if equipped) 15. Driver seat belt pretensioner (if equipped)
[C]: Connector 8. To data link connector (DLC) 16. Passenger seat belt pretensioner (if equipped)
1. From main fuse 9.“AIR BAG” monitor coupler 17. LH Forward sensor
2. Ignition switch 10. Ground for air bag system 18. RH Forward sensor
3.“IG METER” fuse 11. SDM 19. To seat belt switch
4.“AIR BAG” warning lamp in combination meter 12. Contact coil assembly
5.“AIR BAG” fuse 13. Driver air bag (inflator) module
1. CONNECTOR “Q01” (SDM CONNECTOR)
TERMINAL CIRCUIT TERMINAL CIRCUIT
Q01-1–Q01-11
Driver pretensioner
(if equipped)Low
Q01-2“AIR BAG” warning lamp Q01-12 High
Q01-3–Q01-13
RH Forward sensorHigh
Q01-4 Ignition switch (power source) Q01-14 Low
Q01-5
Passenger pretensioner
(if equipped)High Q01-15 Diagnosis switch
Q01-6 Low Q01-16–
Q01-7 Passenger air bag (inflator)
moduleHigh Q01-17 Ground
Q01-8 Low Q01-18
LH Forward sensorLow
Q01-9 Driver air bag (inflator)
moduleLow Q01-19 High
Q01-10 High Q01-20 Data link connector (DLC)

10B-16 AIR BAG SYSTEM
Table A - “AIR BAG” Warning Lamp Comes ON Steady
Table B - “AIR BAG” Warning Lamp Does Not Come ON
Table C - “AIR BAG” Warning Lamp Flashes
Table D - “AIR BAG” Warning Lamp Cannot Indicate Flashing Pattern of DTC
WIRING DIAGRAM
1. From main fuse 5.“AIR BAG” fuse 9. To ECM, TCM (if equipped) and ABS control
module (if equipped)
2. Ignition switch 6. Connection detection pin 10.“AIR BAG” monitor coupler
3.“IG METER” fuse 7. SDM 11. Ground for air bag system
4.“AIR BAG” warning lamp in combination meter 8. To DLC [A]: Air bag harness
1
2
34 BLK/BLUBLU/BLK BLU/RED
BLK/WHT BLK/WHTBLUBLU
6
PPL/REDPPL/RED
8
9
10
11
PPL
BLK
“Q04”
“Q01”
Q01-2
Q01-20
Q01-15
Q01-17L1
L2
SDL
DNS
GNDLA
Q01-4
IG
7
[A]
12V
5V
“G27”“Q02”
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-21
Table E - SDM Cannot Communicate through The Serial Data Circuit
WIRING DIAGRAM
TABLE TEST DESCRIPTION
STEP 1 : An improper connection to the data link connector (DLC) will prevent communications from being
established.
STEP 2 : This test checks whether it is possible to communicate with other control module.
STEP 3 : This test checks for an open in “PPL/RED” circuit (in air bag harness).
[A]: Air bag harness 5.“AIR BAG” fuse 10.“AIR BAG” monitor coupler
1. From main fuse 6. Connection detection pin 11. Ground for air bag system
2. Ignition switch 7. SDM 12. Ground on body
3.“IG METER” fuse 8. DLC 13. Ground on Engine block
4.“AIR BAG” warning lamp in combination lamp 9. To ECM, TCM (if equipped) and ABS con-
trol module (if equipped)14. Immobilizer control module (if equipped)
14
1PPL/WHT
BLK
BLK/YEL WHT
10
11
PPL
BLK
“Q04”Q01-15
Q01-17DNS
GND7
[A]5V
812
13
1
2
34 BLK/BLUBLU/BLK BLU/RED
BLK/WHT BLK/WHTBLUBLU
6
PPL/REDPPL/RED
9
Q01-2
Q01-20L1
L2
SDLLA
Q01-4
IG
12V
“G27”
“Q02”
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-23
DTC B1015 - Passenger Air Bag Initiator Circuit Resistance High
DTC B1016 - Passenger Air Bag Initiator Circuit Resistance Low
DTC B1018 - Passenger Air Bag Initiator Circuit Short to Ground
DTC B1019 - Passenger Air Bag Initiator Circuit Short to Power Circuit
WIRING DIAGRAM
DTC WILL SET WHEN
DTC B1015 :
The combined resistance of the passenger air bag (inflator) module, harness wiring and connector terminal con-
tact is above a specified value for specified time.
DTC B1016 :
The combined resistance of the passenger air bag (inflator) module, harness wiring and connector terminal con-
tact is below a specified value for specified time.
DTC B1018 :
The voltage measured at passenger air bag initiator circuit is below a specified value for specified time.
DTC B1019 :
The voltage measured at passenger air bag initiator circuit is above a specified value for specified time.
TABLE TEST DESCRIPTION
DTC B1015, B1016, B1018 and B1019 :
STEP 1 : Check whether malfunction is in passenger air bag (inflator) module.
STEP 2 : Check passenger air bag (inflator) module initiator circuit in air bag harness.
STEP 3 : Check passenger air bag (inflator) module initiator circuit in air bag harness. (for DTC B1019 only)
[A]: Shorting bar 1. From main fuse 3.“AIR BAG” fuse 5. Passenger air bag (inflator) module
[B]: Air bag harness 2. Ignition switch 4. SDM 6. Ground for air bag system
1
2BLU/BLK
BLU/RED
3
6
BLK
“Q01” Q01-4
Q01-17IG
GND4
YEL/RED
YEL Q01-7
Q01-8 P- P+“Q07”
“Q01”
5
[A]
[B]
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 adaptor 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.

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-33
DTC B1031 – Power Source Voltage High
DTC B1032 – Power Source Voltage Low
WIRING DIAGRAM
DTC WILL SET WHEN
DTC B1031 :
The power source voltage to SDM is above specified value for specified time.
DTC B1032 :
The power source voltage is below an approx. 8 V for specified time.
TABLE TEST DESCRIPTION
DTC B1031 :
STEP 1 : Check if voltage applied to SDM is within normal range.
STEP 2 : Check if DTC B1031 still exists.
DTC B1032 :
STEP 1 : Check if voltage applied to SDM is within normal range.
STEP 2 : Check if DTC B1032 still exists.
[A] : Air bag harness 2. Ignition switch 4. SDM
1. From main fuse 3.“AIR BAG” fuse 5. Ground for air bag system
1
2BLU/RED BLU/BLK
3
5
BLK
“Q01” Q01-4
Q01-17IG
GND4
[A]
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.

10B-36 AIR BAG SYSTEM
DTC B1035 – RH Forward Sensor Circuit Open or Short to Ground
DTC B1036 – RH Forward Sensor Circuit Short Between Two Wires or Short to
Power Circuit
DTC B1037 – LH Forward Sensor Circuit Open or Short to Ground
DTC B1038 – LH Forward Sensor Circuit Short Between Two Wires or Short to
Power Circuit
WIRING DIAGRAM
DTC WILL SET WHEN
DTC B1035 and B0137 :
The voltage measured at forward sensor circuit (terminal Q01-18, Q01-14) is below a specified value for speci-
fied time.
DTC B1036 and B0138 :
The voltage measured at forward sensor circuit (terminal Q01-18, Q01-14) is above a specified value for speci-
fied time.
TABLE TEST DESCRIPTION
DTC B1035 and B1037 :
STEP 1 : Check whether malfunction is in forward sensor.
STEP 2 : Check if forward sensor circuit is open.
STEP 3 : Check if forward sensor circuit is shorted to ground.
[A] : Air bag harness 2. RH Forward sensor
1. LH Forward sensor 3. SDM
5V
ORN/GRN
ORN/BLU
YEL/GRN
YEL/BLUORN/GRN
ORN/BLU
YEL/GRN
YEL/BLUORN/GRN
ORN/BLU
YEL/GRN
YEL/BLU “G27”
2 1
“Q02”“Q01”
Q01-19
SL+
Q01-18
SL-
Q01-13
SR+
Q01-14
SR-
[A]
3
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.

10B-40 AIR BAG SYSTEM
DTC B1041 – Driver Pretensioner Initiator Circuit Resistance High
DTC B1042 – Driver Pretensioner Initiator Circuit Resistance Low
DTC B1043 – Driver Pretensioner Initiator Circuit Short to Ground
DTC B1044 – Driver Pretensioner Initiator Circuit Short to Power Circuit
DTC B1045 – Passenger Pretensioner Initiator Circuit Resistance High
DTC B1046 – Passenger Pretensioner Initiator Circuit Resistance Low
DTC B1047 – Passenger Pretensioner Initiator Circuit Short to Ground
DTC B1048 – Passenger Pretensioner Initiator Circuit Short to Power Circuit
WIRING DIAGRAM
[A] : Shorting bar 2. Ignition switch 5. Driver seat belt pretensioner
[B] : Air bag harness 3.“AIR BAG” fuse 6. Passenger seat belt pretensioner
1. From main fuse 4. SDM 7. Ground for air bag system
PNK
WHT
BRN
LT GRN
“Q11” “Q12”
Q01-12
Q01-11
Q01-5
Q01-6 PP- PP+ DP- DP+
“Q01”
5
6 [A]
[B]1
2BLU/BLK
BLU/RED
3
7
BLK
“Q01” Q01-4
Q01-17IG
GND4
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.