DTC 22, Rear Defogger Relay Coil Shorted To Battery Or CCM Internal Open: Notes

CCM completes rear defogger control circuit when a defogger "on" request is received from rear defogger switch or heater/air conditioning programmer. CCM grounds rear defogger control circuit to energize relay coil.

DTC 22 will set when CCM attempts to energize rear defogger relay coil for 600 milliseconds and CCM senses high voltage in rear defogger control circuit when voltage should be low.

When DTC 22 is set, SYS will flash. DTC 22 will clear when CCM no longer requests an active rear defogger relay, or CCM senses low voltage in rear defogger control circuit when relay is energized by CCM.