Diagnostic Trouble Code (DTC) Information ECM-6000

Condition

Fig 1: Identifying A/C Relay

Courtesy of VOLVO CARS OF NORTH AMERICA.

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 high, too low or missing.

The diagnostic trouble code (DTC) is diagnosed at ignition on and when starting the engine.

Substitute Value

None.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Damaged A/C relay.

Signal too low

Short-circuit to ground in the signal cable.

Signal missing

Open-circuit in the signal cable
Open-circuit in air conditioning (A/C) relay supply
Damaged A/C relay
Contact resistance in the terminals.

Fault symptom[s]

The air conditioning (A/C) system does not operate.