SEAT Workshop Service and Repair Manuals

Throttle valve control unit -J338-: verification

Special tools and workshop equipment required

t	Manual multimeter -VAG 1526C- or digital multimeter -VAG 1715-

t	Auxiliary cable kit -VAG 1594C-

t	Adapter cable -VAG 1598/31-

t  Adapter cable -VAG 1598/22- t  Current flow diagrams, electrical fault finding and fitting locations   Note t  The engine with the identification letters BXV and BBM uses the Simos 9.1 management system, which has 80 pin connectors, and to carry out the corresponding checks the engine tester -VAG 1598/22- must be used. t  If the throttle valve control part is replaced, the new control part must without fail be adapted to the engine control unit → Chapter. Test prerequisites l  Throttle neither damaged nor dirty. l  Coolant temperature, 80 °C minimum.

Checking sequence

–  Remove engine protection together with air filter -arrows-, separate the gas vent pipe from the engine.

–  Pull 6-pin connector off the throttle valve control unit -J338--arrow-.

–  Measure the throttle valve drive resistance between contacts 3 + 5. t  Specification: 1,0 ... 5.0 Ω. If specification is not obtained: –  Replace the Throttle valve control unit -J338- If result matches specification: –  Check voltage supply of throttle valve control unit and wiring to control unit → Chapter. If there are no faults in the voltage supply or wiring: –  Replace the engine control unit → Chapter.