B1393

DTC B1393 / B1398: Side Rear Impact Sensor Circuit Open

DTC B1393: Side Rear Impact Sensor Circuit Open (Driver Side)

DTC B1398: Side Rear Impact Sensor Circuit Open (Passenger Side)

Wiring Diagram

Refer to B1391 DTC B1391 / B1396: Side Rear Impact Sensor Communication DATA Invalid: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:Advanced Air Bag.

2. Rear side-impact sensor circuit check

Disconnect applicable rear side-impact sensor connector "L43" or "L44".
Disconnect SDM connector "L04".
Check for proper connection to SDM connector at terminals "L04-29" and "L04-30" (for DTC B1393) or terminals "L04-31" and "L04-32" (for DTC B1398).
Check for proper connection to applicable rear side-impact sensor connector at terminals in connector "L43" or "L44".
Measure resistance between "L04-29" and "L43-2" terminals, between "L04-30" and "L43-1" terminals (for DTC B1393).
Measure resistance between "L04-32" and "L44-2" terminals, between "L04-31" and "L44-1" terminals (for DTC B1398).
Special Tool

(A): 09932-76010





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

3. Rear side-impact sensor circuit check

With ignition turn ON, measure voltage between "L04-29" terminal and body ground, between "L04-30" terminal and body ground (for DTC B1393).
Measure voltage between "L04-31" terminal and body ground, between "L04-32" terminal and body ground (for DTC B1398).
Special Tool

(A): 09932-76010





Is each measured voltage 0 V?
YES
Replace rear side-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:Advanced Air Bag
, if any.
- Repeat Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Advanced Air Bag
to confirm that the trouble has been corrected.