Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-520C

Condition




The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the air conditioning (A/C) pressure sensor is higher than the normal operating range.
The diagnostic trouble code (DTC) can be diagnosed while the engine is running and while air conditioning (A/C) control is active.

Substitute value
None.

Possible source
- Short-circuit to supply voltage in the signal cable
- Open-circuit in the power supply
- Open-circuit in the ground lead
- Damaged A/C pressure sensor.

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