Suzuki Ignis Service Manual page 3928

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
3
BLK/YEL
1
2
[A]
7
[A]: Shorting bar
1. From main fuse
2. Ignition switch
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 correct termi-
nal adapter from special tool (Connector test adapter kit).
• When a check for proper connection is required, refer to "Intermittents and Poor Connections" in this sec-
tion.
• 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.
DTC WILL BE 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 or 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.
STEP 3: Check whether malfunction is in contact coil or driver air bag (inflator) module.
"L21"
"G75"
"L63"
RED
RED
L21-32 IG
BLK
L21-31 GND
3. "AIR BAG" fuse
4. SDM
5. Contact coil assembly
4
"L21"
+12V
"L27"
GRN/RED
P+
L21-27
GRN
P- L21-26
6. Driver air bag (inflator) module
7. Ground for air bag system
AIR BAG SYSTEM 10B-27
"L71" "G51"
5
GRN/RED
GRN
6