Audi 80 Quiz
KE-III-Jetronic Injection System

Idle Speed Stabilization Test

In this manual: KE-III-Jetronic Injection System
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

TEST PROCEDURE

Switch on the ignition and touch the control valve by hand: a working vibration should be felt. If not, either the control valve or the KE-III-Jetronic control unit is faulty.

Check the control valve: disconnect the connectors. Measure the resistance between the control valve connector terminals: it should be negligible. An "infinite" reading indicates an open winding – the control valve is defective.

If the control valve is good, the cause of the fault may be an open circuit in the wiring or a faulty control unit. Check and, if necessary, replace.

Connect an LED voltmeter to both poles of the free wire end.

Switch on the ignition.

The voltmeter should light up; in this case, the power supply from the KE-III-Jetronic control unit is in order.

Test yourself

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