Driver Forward Impact Sensor Circuit Open

DTC B1074: Driver Forward Impact Sensor Circuit Open

Wiring Diagram

Refer to Driver Forward Impact Sensor Circuit Shorted to Ground DTC B1073: Driver Forward Impact Sensor Circuit Shorted to Ground:Except Advanced Air Bag.

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 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".
Check for proper connection to forward impact-sensor connector at terminals "E40-1" and "E40-2".
Measure resistance between "L04-50" and "E40-1" terminals, between "L04-51" and "E40-2" terminals.
Special Tool

(A): 09932-76010





Is each measured resistance 1 ohms or less?
YES -
Go to Step 3.
NO -
Repair high resistance or open in defective circuit.

3. Forward impact-sensor circuit check

With ignition turned ON, measure voltage between "L04-50" terminal and body ground, between "L04-51" terminal and body ground.
Special Tool

(A): 09932-76010





Is each measured voltage 0 V?
YES -
Replace forward impact-sensor, and recheck.
If DTC still detected, replace SDM.
NO -
Repair short to power supply circuit or other circuit 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.