With Passenger Side Airbag

MALFUNCTION
Diagnostic trouble code 43A22: Electric detonator 4, open circuit

DIAGNOSTIC PROCEDURE
1. Unscrew the steering wheel airbag module and unplug the connector at the rear of the airbag. Plug reference resistor 84 71 153 into the connector.
2. Remove the lower cover and unplug passenger side airbag connector H2-80. Plug reference resistor 84 71 153 via cable 86 11 378 into the connector.
3. Switch ON the ignition and clear the trouble code. Switch the ignition OFF and then ON again. Wait at least 40 seconds with the ignition ON. Check whether the trouble code recurs.
If the trouble code recurs - proceed to point 3. If the trouble code does not recur, the fault could be in the passenger side airbag. Switch OFF the ignition and carry out a double check by plugging in the airbag. Switch ON the ignition and wait at least 40 seconds with the ignition ON.
4. Check whether the trouble code recurs.
If the trouble code does recur, switch OFF the ignition and change the passenger side airbag. Switch ON the ignition and clear the trouble code. Switch the ignition OFF and then ON again. Wait at least 40 seconds with the ignition ON. Check whether the trouble code recurs.
5. Switch OFF the ignition and unplug the connector at the control module. Check pins 15 and 16 for continuity and/or slide-out.
6. Plug in the connector, switch ON the ignition and clear the trouble code. Switch the ignition OFF and then ON again. Wait at least 40 seconds with the ignition ON. Check whether the trouble code recurs.
If the trouble code does not recur, the fault was in the connector.
If the trouble code does recur, check the wiring by plugging breakout box 86 11 006 into the connector at the control module and measure the resistance across pins 15 and 16.
If the resistance is high, investigate the cause and change the wiring as necessary.
If the resistance is 2-3 ohms, plug the connector into the control module, switch ON the ignition and clear the trouble code. Switch the ignition OFF and then ON again. Wait at least 40 seconds with the ignition ON. Check whether the trouble code recurs.
If the trouble code for open circuit recurs, Testing and Inspection