Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
Diagnostic trouble code (DTC) ECM-6B is stored if the air conditioning (A/C) pressure sensor signal is too high or too low.

Substitute value
- Air conditioning (A/C) shut off.

Possible source

Signal too high:
- Short-circuit to supply voltage in the signal cable
- Open-circuit in the ground lead
- Contact resistance and oxidation
- Defective air conditioning (A/C) pressure sensor.

Signal too low:
- Short-circuit to ground in signal cable
- Open-circuit in the signal cable
- Low pressure in the air conditioning (A/C) system
- Contact resistance and oxidation
- Defective air conditioning (A/C) pressure sensor.

Hint: A diagnostic trouble code (DTC) may be stored at low temperatures despite the absence of any faults.

Fault symptom[s]
- The air conditioning (A/C) system does not operate.