Audi 80 Quiz
MPI and MPFI Injection Systems

Engine Coolant Temperature Sensor for Ignition/Injection System

In this manual: MPI and MPFI Injection Systems
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

The temperature sensor may cause engine malfunctions within certain temperature ranges. Check:

PROCEDURE

Disconnect the engine coolant temperature sensor connector.

Using a precision ohmmeter, measure the resistance between both sensor terminals.

Compare the measured result with the specified values in the chart above, according to coolant temperature. If the value deviates significantly from the specification, replace the temperature sensor.

As a supplement, two additional reference resistance values: at 20°C coolant temperature the resistance should be approximately 2.5 kΩ, at 80°C approximately 330 Ω.

Test yourself

A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.