5000CD Quattro Wagon (Canada) L5-2226cc 2.22L SOHC Turbo (MC) (1986)
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Check for short circuit in wiring between control unit and air temperature sensor
If wiring OK
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Replace control unit
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Repeat test
Removing/installing
Work sequence
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Push back cover on intake air temperature sensor (arrow)
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Cut off wires at sensor
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Remove sensor
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Remove protective cover and install new sensor
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Fit rubber insulator and protective cover over wiring
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Fit terminal lugs on bared wires and solder to sensor contacts
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Push rubber insulator over soldered joints
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Push protective cover onto sensor