Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




Diagnostic trouble code (DTC) CCM-001A is stored if the control module registers that the signal from the fan knob is in excess of 99% or less than 1% of supply voltage (approximately 5 V).

Substitute value
- The control module adopts a value corresponding to half of the maximum fan knob output.

Possible source
- Defective potentiometer
- Short-circuit to supply voltage or ground in the potentiometer.

Fault symptom[s]
- The blower fan only runs at one speed.