Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Control Module (ECM) / Powertrain Control Module (PCM)
- BPP Circuit Signal
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The scan tool displays Applied or Released. The scan tool displays the status of the brake switch.
- IMS
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The scan tool displays Drive 3, Drive 4\Drive 3, Park\Reverse, Reverse, Drive 3\Drive 2, Drive 2, Park, Invalid, Neutral\Drive 4, Drive 4, Neutral, Reverse\Neutral, Drive 1, Drive 2\Drive 1 or Open for the LZ9. The scan tool displays the position of the transmission range switch.
- Stoplamp Pedal Switch
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The scan tool displays Applied or Released. The scan tool displays the status of the brake switch.
- TCC Brake Switch
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The scan tool displays Open or Closed. The scan tool displays the status of the TCC Brake switch.
- TR Sw.
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The scan tool displays Park, Reverse, Neutral, Invalid, Drive 4 or Drive 3 for the L61 or Drive 1, Drive 2, Drive 3, Drive 4, Neutral, Reverse, Park or Invalid for the LX9. The scan tool displays the position of the transmission range switch.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.