Self-Diagnostic Procedure (TAC Module)

Access TAC module located near blower motor. While viewing LED light on side of TAC module, turn ignition on or start engine to begin TAC self-diagnosis. See Figure. If any TAC codes exist, they will be displayed by flashing 2 digit codes via LED of TAC module. See READING TAC CODES. Determine trouble areas using MALFUNCTION CODE/SYMPTOM CHART table. After repairs, erase trouble code(s) stored in TAC module memory. See CLEARING TAC MODULE MEMORY. Read codes again and ensure codes are erased (only code 55 is displayed).