What this code means
B0010-13 means the SRS unit detected an open or increased resistance in the front passenger's airbag first inflator.
An open circuit is a break in an electrical path. Increased resistance means the path has more resistance than the procedure allows. For B0010, the path under investigation belongs to the front passenger's airbag first 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 first inflator, its connecting paths and the SRS unit are different possible fault areas. Naming the front passenger's airbag first 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
- SRS unit detection line voltage is higher than specified.
Possible fault areas
- The front passenger's airbag can be a fault area.
- Other related components can be involved.
- The RA1+ or RA1- circuit can be open.
- The SRS unit can remain as the possible cause after normal inspections.
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 RA1+ and RA1- 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
B0010-13 means the system detected an open or increased resistance in the Front Passenger's Airbag First Inflator. The SRS unit stores this DTC if the voltage on its internal detection line is higher than a specified value. This diagnostic path evaluates the component through its related components.
Safety and history checks
Follow the SRS safety precautions and the specified 12 volt battery terminal disconnection and reconnection procedure before testing. Before troubleshooting, find out if the vehicle was in a collision. If it was, make sure all required components were replaced with new components. Check that those new components have the correct part number and were properly installed.
Confirmation procedure
To confirm the code, turn the vehicle to the ON mode. Wait for 10 seconds to give the system time to run the confirmation check.
Front passenger's airbag inspection preparation
Before disconnecting the SRS related connector for the front passenger's airbag, follow the 12 volt battery terminal disconnection procedure. Wait for at least 3 minutes. After that wait, disconnect the front passenger's airbag inflator connector (4P).
Simulator connection and result
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. Repeat the confirmation procedure. A normal result means DTC B0010-13 is not 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 B0010-13 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 first 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 first 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.
RA1+, RA1- open wire inspection preparation
Check wires RA1+ and RA1- for an open. Before disconnecting the SRS related connector, follow the 12 volt battery terminal disconnection procedure. Wait for at least 3 minutes. Disconnect SRS unit connector A (43P). Also disconnect the front passenger's airbag inflator connector (4P).
RA1+ open wire inspection
With IG Mode OFF, check the RA1+ wire path.
- First probe: disconnected SRS unit connector A (43P) female terminal 7.
- Other probe: disconnected front passenger's airbag inflator connector (4P) female terminal 1.
- Normal reading: less than 1 ohm.
If this open wire inspection is abnormal, there is a problem in the circuit.
The RA1+ path is identified by SRS unit connector A terminal 7 and airbag connector terminal 1. The RA1- path is identified by SRS unit connector A terminal 6 and airbag connector terminal 2. Both inspections use disconnected connectors and IG Mode OFF, with less than 1 ohm as the normal criterion.
These are wire-path resistance measurements. The 2 ohm connectors specified earlier belong to the SRS inflator simulator connection. That simulator specification and the less-than-1-ohm wire criterion describe different parts of the procedure. Keeping them separate makes the simulator result and the wiring results easier to interpret.
RA1- open wire inspection
With IG Mode OFF, check the RA1- wire path.
- First probe: disconnected SRS unit connector A (43P) female terminal 6.
- Other probe: disconnected front passenger's airbag inflator connector (4P) female terminal 2.
- Normal reading: less than 1 ohm.
If this open wire inspection is abnormal, there is a problem in the circuit.
SRS unit inspection logic
If the other inspection items showed normal results, the SRS unit is the remaining cause. Do not reach that conclusion before the earlier inspections show normal results.
Closing takeaway
Confirm the code first. Use the simulator to isolate the front passenger's airbag. Then check the RA1+ and RA1- circuit resistance before judging the SRS unit.
Final check
Confirm the DTC, test the front passenger's airbag path with the simulator, check RA1+ and RA1- resistance, then judge the SRS unit only after normal inspection results.
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.
