Advanced Air Bag

DTC B1043: Passenger Air Bag (1st Stage) Circuit Shorted to Ground

Wiring Diagram

Refer to B1041 DTC B1041: Passenger Air Bag (1st Stage) 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. Passenger air bag 1st stage circuit check

Remove passenger air bag (inflator) module from steering column referring to Removal and Installation Passenger Air Bag (Inflator) Module Removal and Installation:Advanced Air Bag.
Disconnect SDM connector "L04".
Check for proper connection to SDM connector at terminal "L04-5" and "L04-6".
Check for proper connection to passenger air bag (inflator) module at terminals in "G259" (orange connector).
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 "L04-5" terminal and body ground, and between "L04-6" terminal and body ground.






Is each measured resistance infinity?
YES
Substitute a known-good SDM and recheck.
NO
Go to Step 3.

3. Floor harness circuit check

Disconnect "L403" connector located near the passenger side front pillar lower trim.
Check for proper connection to floor harness connector at terminal "L403-3" and "L403-4".
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 "L403-3" terminal and body ground, and between "L403-4" terminal and body ground.






Is each measured resistance infinity?
YES
Repair "PPL/YEL" circuit or "LT GRN/RED" circuit for short to ground at instrument panel harness.
NO
Repair "PPL/YEL" circuit or "LT GRN/RED" circuit for short to ground at floor harness.

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.