Except Advanced Air Bag

DTC B1042: Passenger Air Bag (1st Stage) Circuit Low Resistance

Wiring Diagram

Refer to B1041 DTC B1041: Passenger Air Bag (1st Stage) Circuit High Resistance:Except 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 Air Bag Diagnostic System Check Flow:Except Advanced Air Bag.

2. Passenger air bag 1st stage circuit check

Remove passenger air bag (inflator) module referring to Removal and Installation Passenger Air Bag (Inflator) Module Removal and Installation:Except Advanced Air Bag.
Check for proper connection to passenger air bag (inflator) module at terminals in "G259" connector.
If OK, then connect special tools (A), (B) and (C) to "G259" connector.
Special Tool

(A): 09932-76010

(B): 09932-75010

(C): 09932-78310





Check SDM for DTC.

With ignition switch ON, is DTC B1042 indicated?
YES -
Go to Step 3.
NO -
Replace passenger air bag (inflator) module referring to Removal and Installation Passenger Air Bag (Inflator) Module Removal and Installation:Except Advanced Air Bag.

3. Passenger air bag 1st stage circuit check

With ignition switch turned OFF, disconnect SDM connector "L04".
Check for proper connection to SDM connector at terminal "L04-5" and "L04-6".
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 "G259-1" and "G259-2" terminals.






Is measured resistance infinity?
YES -
Substitute a known-good SDM and recheck.
NO -
Go to Step 4.

4. Floor harness circuit check

Disconnect "L399" connector located near the passenger side front pillar lower trim.
Check for proper connection to floor harness connector at terminal in "L399" 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 "L399-1" and "L399-2" terminals.






Is measured resistance infinity?
YES -
Repair "BLU/RED" circuit for short to "YEL/RED" circuit at instrument panel harness.
NO -
Repair "BLU/RED" circuit for short to "YEL/RED" circuit 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:Except Advanced Air Bag
, if any.
- Repeat Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Except Advanced Air Bag
to confirm that the trouble has been corrected.