Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2003PASSAT SEDAN (3B3) V6-2.8L (ATQ)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULESERVICE AND REPAIRHOUSING FOR ENGINE CONTROL MODULE IN PLENUM
2003 Volkswagen Passat Sedan (3B3) V6-2.8L (ATQ)
Housing For Engine Control Module In Plenum
2003 Volkswagen Passat Sedan (3B3) V6-2.8L (ATQ)SECTION Housing For Engine Control Module In Plenum
Housing For Control Modules In Plenum, Removing And Installing
CAUTION!
Before beginning repairs on the electrical system :
- Obtain the anti-theft radio security code.
- Switch the ignition off.
- Disconnect the battery Ground (GND) strap.
- After reconnecting battery, re-code and check operation of anti-theft radio.
Removing
- Remove cap in windshield cowl panel under the left wiper arm (move wiper arm if necessary).
- Remove screw for housing cover underneath cowl panel as illustrated.
- Remove remaining screws -arrows- and take off housing cover.
- Remove Engine Control Module (ECM). (If necessary, remove eight position auxiliary relay panel and fuse panel).
- Disconnect all electrical connectors at connector station.
- Slide rubber grommet and wiring harness for engine controls up and out of slot in housing.
- Remove nuts -A-, 4 Nm (35 in lb).
- Push housing to rear (into plenum) to disengage from retainer bracket -B- and remove housing.
Installing
Installation is in reverse order of removal.
Installation Notes:
- Always replace gasket -C-. Do not allow gasket to block or interfere with opening in plenum for harnesses.
- When installing cover for housing, engage into tab and press firmly into place by hand first. Cover screws MUST be torqued to 4 Nm (35 in lb)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.