Throttle Motor Relay Monitor - P1251, P1658

Throttle motor relay monitor - P1251, P1658

DC Motor relay OFF failure
During ignition on the relay driver signal is compared with the relay output signal. If the ECM is commanding the relay ON and detecting the relay as OFF for more than a calibratable period, a failure judgement is made.

DC Motor relay ON failure
During ignition on the relay driver signal is compared with the relay output signal. If the ECM is commanding the relay OFF and detecting the relay as ON for more than a calibratable period, a failure judgement is made.