Air Bag System: 8B-69
DTC B1074 / B1078: Driver / Passenger Forward-Sensor Circuit Short to Power Circuit or Open
S5JB0A8204037
Wiring Diagram
Refer to “DTC B1073 / B1077: Driver / Passenger Forward-Sensor Circuit Short to Ground: ”.
CAUTION
!
Be sure to observe instructions under CAUTION in “Air Bag Diagnostic System Check Flow”.
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 power supply circuit.
Step 3: Check if malfunction is in forward-sensor.
DTC Troubleshooting
Step Action Yes No
1 1) Turn ignition switch to OFF position.
2) Disconnect forward-sensor connector “E13” or “E24”.
3) Disconnect SDM connector “G47” or “L33”.
4) Check proper connection to SDM connector at terminals
“G47-9” and “G47-17” or “L33-9” and “L33-10” (for DTC
B1074), or terminals “G47-11” and “G47-19” or “L33-11”
and “L33-12” (for DTC B1078).
5) Check proper connection to forward-sensor connector at
terminals “E13-1” and “E13-2” or “E24-1” and “E24-2”.
6) Using service wire (1), connect “E13-1” and “E13-2”
terminal (for DTC B1074) or “E24-1” and “E24-2”
terminal (for DTC B1078) of forward-sensor connector.
7) Measure resistance between “G47-9” and “G47-17” (for
DTC B1074) or “G47-11” and “G47-19” (for DTC B1078)
[A], or between “L33-9” and “L33-10” (for DTC B1074) or
“L33-11” and “L33-12” (for DTC B1078) [B].
Special tool
(A): 09932–76010
Is each measured resistance 1
Ω
or less?
Go to Step 2. For DTC B1074: High
resistance or open wire
in “ORN” circuit or
“PNK/BLK” circuit.
For DTC B1078: High
resistance or open wire
in “PNK” circuit or “PNK/
BLU” circuit.
“E13-1”, “E24-1” “E13-2”, “E24-2”
1
[A]
[B]
“L33-12”
“L33-9”
“L33-10”
“L33-11”
“G47-9”
“G47-17”
“G47-19”
“G47-11”
(A)
I5JB0A820051-01
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