Driver Forward Impact Sensor Circuit Shorted to Ground

DTC B1073: Driver Forward Impact Sensor Circuit Shorted to Ground

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Troubleshooting



1.
Was "Air Bag Diagnostic System Check Flow" performed?
YES
Go to Step 2.
NO
Go to Air Bag Diagnostic System Check Flow:Except Advanced Air Bag.

2. Forward impact-sensor circuit check

Disconnect forward impact-sensor connector "E40".
Disconnect SDM connector "L04".
Check for proper connection to SDM connector at terminals "L04-50" and "L04-51".
Measure resistance between "L04-50" terminal and body ground.
Special Tool

(A): 09932-76010





Is each measured resistance infinity?
YES
Go to Step 3.
NO
Repair short to ground in defective circuit.

3. Forward impact-sensor circuit check

Measure resistance between "L04-50" and "L04-51" terminals.
Special Tool

(A): 09932-76010





Is each measured resistance infinity?
YES
Replace defective forward impact-sensor, and recheck.
If this DTC is still detected, replace SDM.
NO
Repair short to ground in defective circuit.

NOTE:

Upon completion of inspection and repair work, perform the following items.

- Reconnect all air bag system components and ensure all components are properly mounted.
- Clear DTCs referring to DTC Clearance DTC Clearance:Except Advanced Air Bag
, if any.
- Repeat Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Except Advanced Air Bag
to confirm that the trouble has been corrected.