Battery and PCM Installation & Flashing
At 24:59 in
Budget Turbo Yukon XL Build: ECU is FRIED! Junkyard Parts Hunting + Tips To Identify Parts
What happens here
The new XS Power battery is installed in the vehicle. The damaged PCM is set aside, and the second, undamaged PCM is installed in its place. The creator then connects a laptop to the vehicle's OBD-II port to flash the new PCM with the correct tune. Initial attempts to connect and flash the PCM fail. Troubleshooting reveals that the MAP (Manifold Absolute Pressure) sensor is unplugged, which is essential for the engine to run and for the PCM to communicate correctly. After plugging in the MAP sensor, the PCM successfully flashes, and the engine starts.
Goal: Successfully install the new battery and PCM, flash the correct tune, and start the engine.
Tools and materials
- HP Tuners Interface HP Tuners — Connecting the laptop to the vehicle's OBD-II port for flashing
- Laptop MacBook — Running HP Tuners software for PCM flashing
- MAP Sensor General Motors — Monitoring manifold absolute pressure for engine operation
- P59 PCM — Engine control unit
- Wrench Set — Removing/installing PCM connectors
- XS Power D3400 12V Battery XS Power — Providing electrical power to the vehicle
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