Checking components and wiring

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Check that the resistance between relay terminals #1 and #2 is approximately 75-105 Ω at +20 °C.

Check the signal cable between engine control module (ECM) terminal #38 (half speed), terminal #8 (full speed) and terminal #69 (air conditioning (A/C) cooling fan) and relay terminal #2. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults . Remedy as necessary.

Other information

To connect the breakout box, see Connecting the breakout box. EMS 2000 .

Fig 1: Identifying Air Conditioning (A/C) Relay Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying EMS2000

Courtesy of VOLVO CARS OF NORTH AMERICA.

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