Advanced Air Bag

DTC B1052 / B1056: Seat Belt Pretensioner Circuit Low Resistance

DTC B1052: Driver Seat Belt Pretensioner Circuit Low Resistance

DTC B1056: Passenger Seat Belt Pretensioner Circuit Low Resistance

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" or "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 B1052 or B1056 still indicated?
YES
Go to Step 3.
NO
Replace defective seat belt pretensioner referring to Removal and Installation Front Seat Belt Removal and Installation.

3. Seat belt pretensioner circuit resistance 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 B1052) or terminals "L04-9" and "L04-10" (for DTC B1056).
If OK, release shorting bar in SDM connector inserting release tool (1) included in special tool (A).
Special Tool

(A): 09932-76010

Measure resistance between "L04-7" and "L04-8" (for DTC B1052) or between "L04-9" and "L04-10" (for DTC B1056).






Is each measured resistance infinity?
YES
Substitute a known-good SDM and recheck.
NO
Repair shorted wire 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.