Selector Mechanism, Through 11.2005
Transmission Park Selector Switch
Transmission Park Selector Switch (F305) consists of two microswitches. The two microswitches create the signal that the electronic ignition key removal lock needs to release the key only in selector lever position P.
The first switch is closed when the Shift Lock Solenoid (N110) is not active in selector lever position "P" (with brake pedal not depressed) and also selector lever manual release below ashtray is not actuated.
The second switch is closed when the button on selector lever handle is not actuated in selector lever position "P".
Following points must be observed before replacing Transmission Park Selector Switch (F305):
1. Both switches are switched electrically in sequence, that is, both switches must be closed for ignition key to be removed. Switches can be checked using Vehicle Diagnosis, Testing and Information System (VAS 5051B) under Guided Fault Finding. After performing tests on vehicle system, you must select test program "F305 - Gear selector position P switch" via function/component selection (drive/multitronic 01J front wheel drive/01-On Board Diagnostic (OBD) capable systems/02 - Transmission Electronics/Electrical components).
2. And electrical test on the switch is also possible. If a continuity test is performed with a multimeter, note that in this case, there is a resistance value of approximately 470 Ohm when both switches are closed.
Removing
- Remove selector mechanism => [ Selector Mechanism Function Unit ] Selector Mechanism Function Unit
- Remove screws - arrows - and remove Selector Lever Sensor System Control Module (J587) with Tiptronic Switch (F189).
- Release connector - D - and remove from Shift Lock Solenoid (N110).
- Release connector - E - and remove upward.
- Press tab - C - in direction - arrow 1 -.
- Remove microswitch - B - in direction - arrow 2 -.
- Disengage electrical line at selector mechanism - arrow A -.
- Remove retaining clips - A - on both sides of selector mechanism.
- Press parking lock button - C - down and hold.
- Remove selector rod - B - upward and shift selector lever in direction of - arrow - until it engages in selector lever position "S".
- Using a screwdriver, push retaining pin - A - forward through rear retaining clip opening in direction of - arrow -.
• Retaining screws - A - must not be removed. They must only be pressed forward far enough so microswitch - B - can be removed.
- Remove microswitch - B - forward.
- Disengage electrical wiring from tab - arrow C - and remove microswitch from shift mechanism.
Installing
Install in reverse order, paying attention to the following:
- Guide microswitch on longer electrical line into opening under parking lock button in selector mechanism.
- Insert microswitch - B - in shift gate.
• Microswitch must lie flush on all sides.
- Engage electrical line in tab - arrow C -.
- Press retaining screws - A - with a screwdriver opposite direction of arrow to stop.
• Retaining screws - A - secure microswitch - B - in shift gate.
• Ignition key removal lock does not function correctly if microswitch is not inserted correctly or properly secured.
- Secure electrical line - arrow A - at selector mechanism according to illustration.
- Install microswitch - B -.
• Ignition key removal lock does not function correctly if microswitch is not inserted correctly or properly secured.
- Position connector - D - on Shift Lock Solenoid (N110).
- Engage connector - E - from above.
- Install retaining clips - A - on both sides of selector mechanism.
- Install Selector Lever Sensor System Control Module (J587) with Tiptronic Switch (F189) => [ Selector Lever Sensor System Control Module with Tiptronic Switch ] Service and Repair.
- Install selector mechanism => [ Selector Mechanism Function Unit ] Selector Mechanism Function Unit.