What this code means
B0011 can indicate an open circuit or increased resistance in the front passenger's airbag second inflator.
An open circuit is a break in an electrical path. Increased resistance means the path has more resistance than the procedure allows. For B0011, the path under investigation belongs to the front passenger's airbag second inflator. The diagnosis therefore needs to separate a problem associated with that component from a problem elsewhere in its circuit.
The front passenger's airbag second inflator, its connecting paths and the SRS unit are different possible fault areas. Naming the front passenger's airbag second inflator in the code does not make those possibilities interchangeable. The steps below narrow the fault area by changing a defined test condition and then checking the individual paths.
What the vehicle may do
- The SRS unit can store this code for high detection-line voltage.
Possible fault areas
- The front passenger's airbag may have a problem.
- The front passenger's airbag circuit may have an open wire.
- The SRS unit may have a problem.
The procedure moves through confirmation, an indirect component check and electrical-path checks. In the indirect check, the specified SRS simulator and simulator lead is used exactly as described. The result determines whether the component or other related parts remain involved. The later measurements examine RA2+ and RA2- through the wiring between the passenger airbag connector and SRS unit.
Read the result criteria alongside the action that produces them. During the component check, a normal circuit-test result can point to a problem with the named component. During a wire check, an abnormal reading instead points to the checked path. These conclusions belong to different stages of the diagnosis.
Diagnostic path
Understand the stored condition
B0011 means Open or Increased Resistance in the Front Passenger's Airbag Second Inflator. The SRS unit monitors the voltage on a detection line inside the unit. If the voltage rises above a specified value, the SRS unit detects an abnormality and stores the code.
Diagnostic clues and possible fault areas
The SRS unit can store this code for high detection-line voltage.
Checks before testing
Follow the SRS safety precautions and procedures. Use the specified 12 volt battery terminal disconnection and reconnection procedure. Find out whether the vehicle was in a collision. If it was, make sure all required components were replaced with new components. Check that those components have the correct part numbers and were installed properly.
Initial confirmation
Turn the vehicle to the ON mode to confirm the condition. Wait for 10 seconds.
Prepare the airbag circuit inspection
Before disconnecting an SRS related connector, follow the 12 volt battery terminal disconnection procedure. Wait for at least 3 minutes. Disconnect the front passenger's airbag inflator connector (4P).
Connect the SRS inflator simulator
Connect the terminals of SRS simulator lead J to the SRS inflator simulator (2 ohm connectors). Connect SRS simulator lead J to the front passenger's airbag inflator connector (4P) on the dashboard wire harness.
Check the result with the simulator
With the simulator connected, turn the vehicle to the ON mode to confirm the condition. Wait for 10 seconds. For a normal result, DTC B0011-13 should not be indicated. If the result is normal, there is a problem with the front passenger's airbag. If the result is abnormal, there is a problem with other related components.
For the component test, a normal result means the stated DTC B0011-13 is not indicated after the specified test connection and confirmation. The procedure associates that normal test result with a problem in the front passenger's airbag second inflator. An abnormal result follows the branch for other related components.
Here, the word normal refers to the response of the circuit test. It does not describe a direct resistance measurement of the front passenger's airbag second inflator. The wire checks that follow use their own resistance criteria and therefore answer a different question. This distinction is the key to reading the component and circuit branches correctly.
Prepare the RA2+ and RA2- checks
Check wires RA2+ and RA2- for an open wire next. Before disconnecting an SRS related connector, follow the 12 volt battery terminal disconnection procedure. Wait for at least 3 minutes. Disconnect SRS unit connector A (43P). Disconnect the front passenger's airbag inflator connector (4P).
RA2+ open wire inspection
Check the resistance of RA2+. Keep IG Mode OFF and both connectors disconnected.
- First probe: SRS unit connector A (43P) female terminal 8.
- Other probe: the front passenger's airbag inflator connector (4P) female terminal 3.
- Normal reading: less than 1 ohm.
If the result is abnormal, there is a problem in the circuit.
The RA2+ path runs between SRS unit connector A terminal 8 and airbag connector terminal 3. RA2- is the separate path between SRS terminal 9 and airbag terminal 4. Each is checked with IG Mode OFF and both connectors disconnected, using the stated less-than-1-ohm criterion.
The 2 ohm specification belongs to the inflator-simulator connection used earlier. It is distinct from the wire-path criterion. The simulator stage produces a code-indication result, while these measurements produce resistance results for the individual RA2 paths. Those different result types explain why the procedure has both stages.
RA2- open wire inspection
Check the resistance of RA2-. Keep IG Mode OFF and both connectors disconnected.
- First probe: SRS unit connector A (43P) female terminal 9.
- Other probe: the front passenger's airbag inflator connector (4P) female terminal 4.
- Normal reading: less than 1 ohm.
If the result is abnormal, there is a problem in the circuit.
SRS unit conclusion
If the other inspection items show a normal condition, the remaining SRS unit is the cause. Under that condition, the inspection result points to a problem with the SRS unit.
Final check
The checks can distinguish airbag and circuit problems, with the SRS unit conclusion depending on normal results from the other inspections.
Taken together, the results form a chain. The indirect component check establishes which branch to follow; the individual electrical checks identify an abnormal path; and the final SRS-unit conclusion depends on the earlier inspection items being normal. Keep the actual result beside the component or wire that was being checked. That makes the final decision traceable to the procedure, rather than to the wording of the stored code alone.
