Audi Repair Questions? Ask a Mechanic for Answers ASAP
When you say interlock switch do you mean the clutch pedal position switch or the neutral safety switch?
1. Check for ground at terminal 6/b of the J433 Starter Interlock Relay located in the Main Relay Panel Position #13 (under left side of the dash) with the clutch depressed and the key in the crank position.2. The V94 Central Locking Module (in the right rear of the trunk) provides a ground to activate the J433 Relay when the Clutch Switch F194 is activated by depressing the clutch.3. If no ground is available on pin 6/b of the J433 relay, apply a ground and verify the relay activates and the starter cranks the engine (NOTE! Ensure the vehicle is out of gear before performing this test).4. If relay operation is normal and the vehicle cranks, check for proper operation of the F194 Clutch Switch. The switch should open and close a path to ground as the clutch is depressed. If the switch fails to operate properly it is faulty and must be replaced.
Clutch pedal switch diagram from Audi.
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