Operation CHARM: Car repair manuals for everyone.

Turn Signal On Warning

The BCM sounds the turn signal reminder once per each flash of the turn signal lights when the following conditions are met:
^ The ignition switch is on.
^ The turn signal switch is in either the left turn position or the right turn position (the BCM senses in the past 2 seconds, a turn signal on signal via the IPC class 2 serial data link).
^ The vehicle has traveled a distance of 1.2 km (0.75 mi) as determined by the BCM, sensing vehicle speed signals via the PCM class 2 serial data link.

The BCM keeps active the turn signal reminder until one of the following conditions is met:
^ The ignition switch is off.
^ The turn signal switch returns to the off position (sensing, as determined by the BCM, in the past 2 seconds, no turn signals via the class 2 serial data link).