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Home >> Volvo >> 2013 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 5 Of 13 >> ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Permanent Fault (B5254T2; B6294T; 2003-2004) >> Signal Missing. Permanent Fault >> Checking Components And Wiring

Checking Components And Wiring

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, see COMPONENT SPECIFICATIONS .

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 CORPORATION
Fig 2: Identifying Ohm Meter
GLL101042Courtesy of VOLVO CARS CORPORATION
Fig 3: Identifying A/C Relay
GLL105199Courtesy of VOLVO CARS CORPORATION