Driver / Passenger Side Forward Sensor Circuit Short to Ground

DTC B1073 / B1077: Driver / Passenger Side Forward Sensor Circuit Short to Ground

Wiring Diagram










DTC Will be Set when

The voltage measured at driver / passenger forward-sensor circuit is below a specified value for specified time.

Flow Test Description

Step 2: Check for short circuit between forward-sensor circuit and ground.

Step 3: Check for short circuit between forward-sensor circuit and ground circuit.

DTC Troubleshooting

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

2. Turn ignition switch to OFF position.
Disconnect forward-sensor connector "E13" or "E24".
Disconnect SDM connector "L32".
Measure resistance between "L32-7" terminal and body ground (for DTC B1073) or "L32-10" terminal and body ground (for DTC B1077).
Special Tool

(A): 09932-76010





Is each measured resistance infinity?
YES -
Go to Step 3.
NO -
For DTC B1073: "ORN" circuit shorted to ground.
For DTC B1077: "PNK" circuit shorted to ground.

3. Measure resistance between terminals "L32-7" and "L32-8" (for DTC B1073) or "L32-9" and "L32-10" (for DTC B1077).
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 -
For DTC B1073: "ORN" circuit shorted to "PNK/BLK" circuit.
For DTC B1077: "PNK" circuit shorted to "PNK/BLU" 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, if any. DTC Clearance
- Repeat Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Advanced Air Bag
to confirm that the trouble has been corrected.