DTC Troubleshooting

B1074: SYMPTOM TROUBLESHOOTING REFERENCE CHART

Step	Action	YES	NO
1	Was "Air Bag Diagnostic System Check Flow" performed?	Go to Step 2.	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". 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 Ω or less?	Go to Step 3.	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?	Replace forward impact-sensor, and recheck. If DTC still detected, replace SDM.	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: EXCEPT ADVANCED AIR BAG , if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK: EXCEPT ADVANCED AIR BAG to confirm that the trouble has been corrected.