B1231

DTC B1231 / B1235: Rear Side-Air Bag Circuit High Resistance

DTC B1231: Rear Side-Air Bag Circuit High Resistance (Driver Side)

DTC B1235: Rear Side-Air Bag Circuit High Resistance (Passenger Side)

Wiring Diagram










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:Advanced Air Bag.

2. Rear side-air bag circuit check

Remove applicable driver-side / passenger-side rear side-air bag (inflator) module. Referring to Removal and Installation Rear Side-Air Bag (Inflator) Module Removal and Installation:Advanced Air Bag.
Check for proper connection to applicable rear side-air bag (inflator) module at terminal in connector "L260" or "L261".
If OK, then connect special tools (A), (B) and (C) to applicable rear side-air bag (inflator) connector "L260" or "L261".
Special Tool

(A): 09932-76010

(B): 09932-75010

(C): 09932-78310

Hatchback model





Sedan model





Check SDM for DTC.

With ignition switch turned ON, is DTC B1231 or B1235 still indicated?
YES -
Go to Step 3.
NO -
Replace rear side-air bag (inflator) module referring to Removal and Installation Rear Side-Air Bag (Inflator) Module Removal and Installation:Advanced Air Bag.

3. Floor harness circuit check

With ignition switch turned OFF, disconnect special tools from applicable rear side-air bag (inflator) connector "L260" or "L261".
Disconnect SDM connector "L04".
Check for proper connection to SDM connector at terminal "L04-23" and "L04-24" (for DTC B1231) or terminal "L04-25" and "L04-26" (for DTC B1235).
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 "L04-24" and "L260-1" terminals, between "L04-23" and "L260-2" terminals (for DTC B1231).
Measure resistance between "L04-25" and "L261-1" terminals, between "L04-26" and "L261-2" terminals (for DTC B1235).
Hatchback model





Sedan model





Is each measured resistance 1ohms or less?
YES -
Substitute a known-good SDM and recheck.
NO -
DTC B1231: Repair high resistance or open wire in "PPL/WHT" or "PPL" circuit at floor harness.
DTC B1235: Repair high resistance or open wire in "BLU/RED" or "BLK/RED" circuit at floor harness.

NOTE:

Upon completion of inspection and repair work, perform the following items.

- Reconnect all air bag system components, 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.