P1682 CHEVROLET – Ignition 1 Switch Circuit 2

P1682 CHEVROLET Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),Possible no crank or start

P1682 CHEVROLET Possible Causes

Faulty ignition switch,Ignition Switch harness is open or shorted,Ignition Switch circuit poor electrical connection,Faulty Engine Control Module (ECM)

P1682 CHEVROLET Description

There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). The first ignition circuit is provided by the powertrain relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation. The second ignition 1 voltage circuit is supplied by the run/crank relay through a fuse, and is used to power the remaining internal ECM circuits. If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set.