8B-78 Air Bag System:
DTC B1074: Forward-Sensor Circuit Short to Power Circuit or Open
S7RS0B8204037
Wiring Diagram
CAUTION
!
• Be sure to perform “Air Bag Diagnostic System Check” before starting diagnosis according to flow.
• When measurement of resistance or voltage is required in this flow, use a tester along with a correct
terminal adapter from special tool (Connector test adapter kit).
• When a check for proper connection is required, refer to “Inspection of Intermittent and Poor
Connections”.
• 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 Set when
Forward-sensor abnormal signal is detected by SDM.
Flow Test Description
Step 1: Check for open circuit in forward-sensor circuit.
Step 2: Check for short circuit between forward-sensor circuit and ground.
Step 3: Check for short circuit between forward-sensor circuit and power supply circuit.
Step 4: Check if malfunction is in forward-sensor.
1
2
3
GRN
RED
7
BLK
L29-27
L29-28
IG
E1
4
“L29”
“L04”
“G32”
“L29”
5
ORN
PNK/BLK
ORN
PNK/BLK
L29-50
FD+
L29-51
FD-
6
“E13”
“L03”
“E44”
I7RS0A820024-01
1. From main fuse 4. Junction block assembly 7. Ground for air bag system
2. Ignition switch 5. SDM
3. “A/BAG” fuse 6. Forward-sensor
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