What are the reasons for the Audi A6L having power but no response when starting?
2 Answers
Audi A6L fails to start due to: the ignition switch not being properly positioned or damaged, or a disconnected wire from the ignition switch to the starter relay. You can replace the ignition switch at an Audi 4S shop. The ignition system should operate in the engine's working sequence and must ignite at the most optimal moment. Symptoms of ignition system failure include: 1. Difficulty starting: Mainly manifests as trouble starting, normal idle, normal acceleration in neutral, occasional jerking when starting, and easy stalling when starting on a slope. 2. Engine misfire: Mainly manifests as no issues during idle and low speeds, but starts shaking after continuous high-speed driving for a period. 3. Engine shaking when parked: Mainly manifests as engine shaking when stopping at traffic lights. Increasing engine speed tends to stabilize operation. 4. Weak engine acceleration: Mainly manifests as difficulty starting when cold, followed by idle shaking, weak acceleration, and noticeably increased fuel consumption. 5. Engine fails to start: Mainly manifests as the starter turning but the engine not starting. 6. Jerking while driving: Automatic transmission shifts normally without any shifting impact, but the shift point is earlier than normal, with small amplitude, continuous jerking. Jerking starts at 40km/h and is most noticeable at 60km/h.
Having repaired German cars for over a decade, I've encountered numerous cases where Audi A6L models wouldn't start despite having power. My troubleshooting approach typically follows a simple-to-complex sequence: First, check if there's poor key recognition or if the anti-theft warning light appears on the dashboard. Next, verify the gear position is in P or N - a faulty gear position switch can prevent starting. Then, test whether the starter's 30-power supply line has 12V voltage. If voltage is normal but the starter doesn't respond, focus on inspecting the 50-start signal line. Last time I fixed this issue, it was due to oxidized micro-switches in the gearshift mechanism - cleaning the contacts solved it. Finally, always remember to check the starter relay and fuse in the fuse box; if these burn out, the circuit gets interrupted.
