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Home >> Volvo >> 2004 >> S80 Base, 2.9 92 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 8 Of 11 >> ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Permanent Fault (B5254T2; 2004) >> Signal missing. Permanent fault >> Checking components and wiring >> Notes
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Checking components and wiring: Notes

Check the resistance of the air conditioning (A/C) relay. At +20°C the resistance must be approximately 96 Ω between terminals #2 and #4. For the resistance values:

Check the signal cable between control module terminal #B44 and air conditioning (A/C) relay terminal #4. Check the power supply between system relay terminal #3 and A/C relay terminal #2. Check for an open-circuit. Check for a short-circuit to ground.

Remedy as necessary.

Other information 

Fig 1: Identifying Connector Terminals
GLL104135Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohm Meter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying A/C Relay
GLL105199Courtesy of VOLVO CARS OF NORTH AMERICA.