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Test blower, blower resistor, and/or switch.
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Check connections and wiring, possibly needs replaced and reset.
The BCM does not activate the A/C compressor is your first mistake. The PCM engages the relay to turn the compressor on. It really needs to have the circuits tested to be sure what it needs.
What is the short/long term fuel trim readings on the live data? Could be an issue with the air filter, fuel filter, fuel pump, exhaust leak, or vacuum leak. The computer could be recognizing the fuel enrichment is not being done properly when it has asked for it. Needs to be diagnosed further.
LMC Truck parts
Mains - 26.46Nm + 45deg. Rods - 19.6Nm + 90deg.
Toyota genuine ATF type WS.
Ensure coolant level is full, check for heat at both hoses at the heater core, make sure heater valve is operating properly, if it has one.