Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-630D

Condition




The engine control module (ECM) checks the signal cable for controlling the air conditioning (A/C) relay.
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the air conditioning (A/C) relay is too low.
The diagnostic trouble code (DTC) can be diagnosed at ignition on and with the engine running.

Substitute value
None.

Possible source
- Contact resistance in the terminals
- Short-circuit to ground in the signal cable
- Damaged air conditioning (A/C) relay.

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