Toyota 89581-34020 Air Injection Control Driver

The Toyota 89581-34020 Air Injection Control Driver is an electronic control module designed to operate the secondary air injection (smog pump) system on specific Toyota and Lexus V6 and V8 gasoline engines. It manages the activation and monitoring of the air injection pump to reduce cold-start emissions. This unit supersedes part numbers 89581-34040, 89581-34041, and 89581-71010. It is calibrated for driver-side installation. The module features a sealed aluminum housing with an integrated electrical connector. It communicates with the vehicle ECM via dedicated driver circuits. Replacement may require ECM reprogramming or initialization using OEM diagnostic equipment to clear pending codes and adapt the new driver module to the pump characteristics.