The Toyota automatic transmission pull-down resistor is usually located near the automatic transmission solenoids and relays in the transmission control unit (TCU). The TCU is usually located under the hood of the vehicle, on the engine compartment bulkhead, or near the battery.
Here is the general procedure for finding a buck resistor:
1. Open the hood and locate the transmission control unit (TCU). It may be designated “TCU”, “PCM” or “ECM”.
2. Inspect the TCU and locate the bundle of wires connected to it.
3. Trace the wires coming from the TCU to the solenoids and automatic transmission relay.
4. The pull-down resistor is usually located near the solenoids and relays. It can be a small rectangular resistor with several terminals.
Notes:
*The exact location of the pull-down resistor may vary depending on the Toyota model.
*If you are unable to locate the step-down resistor yourself, contact a qualified mechanic for assistance.