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V40 Base
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Engine Control Module (ECM) Diagnostic Trouble Codes - 2 Of 3
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ECM-7D: Air Conditioning (A/C) Relay Signal. Signal Too Low. Permanent Fault (B4204T3 (Ca) (Us); 2001-2003)
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Signal too low. Permanent fault
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Defective air conditioning (A/C) relay
Defective air conditioning (A/C) relay
Try a new air conditioning (A/C) relay.
Fig 1: Identifying Air Conditioning (A/C) Relay
Courtesy of VOLVO CARS OF NORTH AMERICA.
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