Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-5000

Condition




The diagnostic trouble code (DTC) (Signal too high, Signal too low, Signal missing) is stored if the engine control module (ECM) detects that the signal from the air conditioning (A/C) pressure sensor is higher or lower than the normal operating range of the air conditioning (A/C) pressure sensor or that the signal is missing.
The diagnostic trouble code (DTC) (Faulty signal) is stored if the engine control module (ECM) detects that the pressure in the air conditioning (A/C) system has not increased for a certain time following activation of the air conditioning (A/C) compressor.
The diagnostic trouble code (DTC) is diagnosed while the engine is running and while air conditioning (A/C) control is active.

Substitute value
None.

Possible source

Signal too high
- 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.

Signal too low
- Contact resistance in the connector
- Short-circuit to ground in the signal cable
- Damaged A/C pressure sensor.

Signal missing
- Open-circuit in the signal cable
- Damaged A/C pressure sensor.

Faulty signal
- Damaged A/C pressure sensor
- Low pressure in the air conditioning (A/C) system.

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