90 Quattro 20V L5-2309cc 2.3L DOHC (7A) (1990)
Temperature Gauge: Testing and Inspection
With Auto-Check System
Engine coolant temperature gauge, checking
(for vehicles with Auto-Check system)
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remove connector from thermoswitch
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connect VW 1301 to contact T and ground
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set dial of VW 1301 to 660
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switch ignition ON
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needle must move to area A on gauge
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set dial of VW 1301 to 58
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needle must move to area B on gauge
If needle does not move to specified area,
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check wiring according to current flow diagram
If wiring is OK,
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replace temperature gauge