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Home >> Porsche >> 1987 >> 928 S4 V8-4957cc 5.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Temperature Sensor Check
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Temperature Sensor Check


There are two temperature sensors which work independently of one another in the temperature sensor housing.
1. With ignition Off, disconnect multiple pin plug from ECU.
2. With temperature sensor wire connector attached, connect suitable ohmmeter test leads across ECU connector terminals 2 and 5. Resistance should be as follows:
a. With engine temperature at 32° F, resistance should be 4400 - 6800 ohms.
b. With engine temperature at 75° F, resistance should be 1400 - 3600 ohms.
c. With engine temperature at 104° F, resistance should be 900 - 1300 ohms.
d. With engine temperature at 140° F, resistance should be 480 - 720 ohms.
e. With engine temperature at 176° F, resistance should be 250 - 390 ohms.