Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CCM-00A1

Condition




The diagnostic trouble code (DTC) is stored if the climate control module (CCM) registers that the diagnostic signal from the blower fan power unit is in excess of 10 V and the control current to the blower fan power unit is above 8.56 mA.

Substitute value
- The blower fan cannot start while the fault persists
- The air conditioning (A/C) compressor is not allowed to start.

Possible source
- Blocked blower fan motor
- Open-circuit in the signal cable
- Open-circuit in the ground lead for the blower fan motor
- Short-circuit to supply voltage in the ground lead for the blower fan motor
- Short-circuit to ground in the control signal cable
- Open-circuit in the control signal cable
- Short-circuit to supply voltage in the diagnostic signal cable
- Defective blower fan motor or power unit
- Contact resistance.

Fault symptom[s]
- Blower fan not operating.
- Air flow problem.
- No cooling from the air conditioning (A/C) system.