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Home >> Volvo >> 2008 >> S40 T-5, FWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Central Electronic Module (CEM) Diagnostic Trouble Codes - 5 Of 10 (544 Body) >> CEM-8D01: Stop Lamp Switch. Comparison Fault (2004-2011) >> Comparison Fault (2004, 2005, 2006, 2007) >> Checking >> Checking Component And Wiring

Checking Component And Wiring

Ignition off.

Check the central electronic module (CEM) connector terminal #E28 (#E15), and the stop lamp switch connectors. Check for contact resistance. Check for oxidation. Check for damage carefully.

Check the signal cable between central electronic module (CEM) terminal and the stop lamp switch. Check for an open-circuit. Check for a short-circuit to supply voltage.

Take readings between:

Check the return cable between central electronic module (CEM) terminal and the stop lamp switch. Check for an open-circuit. Check for a short-circuit to supply voltage.

Take readings between:

Remedy as necessary.

Other information 

Fig 1: Identifying 2-Bit Connector
GLL139907Courtesy of VOLVO CARS OF NORTH AMERICA.