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Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control Module (CCM) Diagnostic Trouble Codes - 1 Of 2 >> CCM-0020: Air Quality Sensor. Signal Too Low (1999-2004) >> Signal too low >> Checking the connectors and cables

Checking the connectors and cables

Check connector B on the climate control module (CCM) and the air quality sensor connector. Check for contact resistance and oxidation. Check for loose connections.

Check the cable between climate control module (CCM) terminal #B3 (#3) and air quality sensor terminal #3. Check for an intermittent short-circuit to ground.

Check the cable between climate control module (CCM) terminal #B16 (#16) and air quality sensor terminal #1. Check for an intermittent short-circuit to ground.

Check the cable between climate control module (CCM) terminal #B5 (#5) and air quality sensor terminal #5. Check for an intermittent short-circuit to ground.

Other information: 

Fig 1: Breakout Box
GLL100304Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohm Meter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.