Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) ECM-7D is stored if the control signal cable to the air conditioning (A/C) relay has a short-circuit to ground, short-circuit to supply voltage or an open-circuit.

Substitute Value 

None.

Possible Source 

Signal too high: 

• Short-circuit to supply voltage in the signal cable.
• Faulty air conditioning (A/C) relay.

Signal too low: 

• Short-circuit to ground in the signal cable.
• Open-circuit in the signal cable.
• Faulty air conditioning (A/C) relay.

Fault symptom[s] 

• The air conditioning (A/C) compressor does not function.
• Air conditioning (A/C) compressor operates constantly.