Question about 2005 Audi A3
When ignition turned off I can change the gears but when ignition on or car idling, I cannot move the gear shifter to put it into drive
If a standard check clutch
Posted on Oct 18, 2008
Hi, I had this problem a few years back. It's a faulty brake pedal switch.
The car will not allow you to move the gears until you have your foot on the brake. If the switch is faulty, the car thinks you don't have the brake applied. Ie. if you were to put it into gear without your foot on the brake the automatic would start moving straight away. Not a good idea if you are parked up next to things.
You can test if this is the problem by looking at the red light next to the gearstick. When you apply the brake when in park the light should go out. If it remains lit, the brake switch is faulty. You can only change out of park when the light goes out.
Apparently there is a way of overriding this function by removing the gearstick cover and disconnecting this red light indicator. This can get you moving but remember that your rear brake lights are also powered by the faulty brake pedal switch so people behind you will have no warning of braking... and of course that's illegal too.
The brake pedal switch is cheap to replace but the mechanics time is probably not so cheap. :o)
Hope that helps.
Posted on Oct 25, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
The IPC detects a loss of serial data communications with the ECM. The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
The automatic transmission shift lock control solenoid
The automatic transmission shift lock control switch
With the ignition in the ON position, voltage is supplied to automatic transmission shift lock control switch. Voltage flows through the normally closed contacts of the automatic transmission shift lock control switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is pressed the contacts in the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.
The transmission range (TR) switch is part of the park/neutral position (PNP) and backup lamp switch assembly, which is externally mounted on the transmission manual shaft. The TR switch contains four internal switches that indicate the transmission gear range selector lever position. The PCM supplies ignition voltage to each switch circuit. As the gear range selector lever is moved, the state of each switch may change, causing the circuit to open or close. An open circuit or switch indicates a high voltage signal. A closed circuit or switch indicates a low voltage signal. The PCM detects the selected gear range by deciphering the combination of the voltage signals. The PCM compares the actual voltage combination of the switch signals to a TR switch combination chart stored in memory.
You need a Tech2 scan tool to diagnose this problem ! possible range sensor !
Sep 03, 2015 | Cars & Trucks
car not changing gears it can be shifter assembly issue, or it can also be
transmission issue. Get the shifter assembly inspected with ignition OFF.
more troubleshooting, I suggest you to get the Following help link checked, its
complete step by step procedure to inspect gear shift issues: -----
GEAR SHIFT ISSUES
These will help.
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