DTC K
DTC indicator K: A Problem in the Front Air Mix Control Linkage, Door, or Motor1. Test the front air mix control motor.
Is the front air mix control motor OK?
YES - Go to step 2.
NO - Replace the front air mix control motor, or repair the linkage and doors.
2. Disconnect the front air mix control motor 7P connector.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the following terminals of climate control unit connector B (30P) and the front air mix control motor 7P connector.
Is there continuity?
YES - Go to step 5.
NO - Repair open in the wire(s) between the climate control unit and the front air mix control motor.
5. Check for continuity between body ground and climate control unit connector B (30P) terminals No.10 and No.11 individually.
Is there continuity?
YES - Repair short to body ground in the wire(s) between the climate control unit and the front air mix control motor.
NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.