Question about 2009 Chevrolet Chevrolet Impala LT

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2009 Chevy Impala LT code b001b What to do with this?

Code b001b What are we supposed to do with this?

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Code B001b is for Sensing Diagnostic Module (SDM) for Air bag.

Potential Causes:-

  • Drivers Seat Belt Anchor Pretensioner
  • Passengers Seat Belt Anchor Pretensioner
  • Sensing Diagnostic Module (SDM)
  • Sensing Diagnostic Module (SDM) Wiring
1. Confirm the passenger seat belt anchor pre tensioner connector position assurance is clicked into place.

2. If not, click it in and retest.

3. If the codes reset, disable the Supplemental Inflatable Restraint (SIR) system.

4. Substitute a 2.0 to 2.2 ohm resistor for the passenger seat belt anchor pretensioner. Refer to Tech Tips for a load tool.

5. Retest for the code to reset.

6. If the code resets, check for harness problems between the seat belt anchor pretensioner and the Sensing Diagnostic Module (SDM).
Tech Tips: At the beginning of the 2009 model year, the Impala began being equipped with two pre tensioners for the driver and two pre tensioners for the front passenger. The first pretensioner is still attached to the seatbelt retractor. The second pretensioner is attached to the anchor point for the seat belt.
A load tool can be fashioned from an 1157 light bulb and socket. Turn the bulb into the socket. Using an ohmmeter, determine which 2 wires have 2 - 3 ohms of resistance. Use those 2 wires as the load tool.

Posted on Mar 30, 2015

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