Advanced Air Bag

DTC B1054 / B1058: Seat Belt Pretensioner Circuit Shorted to Power Supply

DTC B1054: Driver Seat Belt Pretensioner Circuit Shorted to Power Supply

DTC B1058: Passenger Seat Belt Pretensioner Circuit Shorted to Power Supply

Wiring Diagram

Refer to B1051 DTC B1051 / B1055: Seat Belt Pretensioner Circuit High Resistance: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. Seat belt pretensioner circuit check

With ignition switch turned OFF, remove center pillar lower trim of applicable side and disconnect applicable seat belt pretensioner connector "L283" and "L285".
Check for proper connection to applicable seat belt pretensioner at terminals in "L283" or "L285" connector.
If OK, then connect special tools (A), (B) and (C) to "L283" or "L285" connector disconnected in Step 1).
Special Tool

(A): 09932-76010

(B): 09932-75010

(C): 09932-78310





Check SDM for DTC.

With ignition switch turned ON, is DTC B1054 or B1058 still indicated?
YES
Go to Step 3.
NO
Substitute a known-good SDM and recheck.

3. Seat belt pretensioner circuit check

Disconnect special tools from applicable seat belt pretensioner connector.
Disconnect SDM connector "L04".
Check for proper connection to SDM at terminals "L04-7" and "L04-8" (for DTC B1053) or terminals "L04-9" and "L04-10" (for DTC B1057).
If OK, release shorting bar in SDM connector inserting release tool (1) included in special tool (A).
Special Tool

(A): 09932-76010

With ignition switch turned ON, measure voltage between "L04-7" and body ground, and between "L04-8" and body ground (for DTC B1053).
Measure voltage between "L04-9" and body ground, and between "L04-10" and body ground (for DTC B1057).






Is each measured voltage 0 V?
YES
Substitute a known-good SDM and recheck.
NO
Repair short to power supply 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.