The Park/Neutral Position (PNP) switch, mounted on the transmission, allows
the vehicle to start only in P or N. The switch
has a dual purpose, in that it is also the back-up lamp switch.
| Fig. 1: View of the Park/Neutral Position (PNP) switch
used on the A4LD transmission
|
- Disconnect the negative battery cable.
- Raise and support the vehicle safely.
- Disconnect the harness connector from the neutral start switch.
- Clean the area around the switch. Remove the switch and O-ring, using a
thin wall socket (tool T74P-77247-A or equivalent).
- Installation is the reverse of removal. Check the operation of the switch,
with the parking brake engaged. The engine should only start in N or P.
The back-up lamps should come ON only in R.
| Fig. 2: View of the Park/Neutral Position (PNP) switch
|
- Disconnect the negative battery cable.
- Raise and safely support the vehicle.
- Disconnect the control linkage from the transmission manual shaft.
- Disconnect the park/neutral switch harness connector, remove the switch
mounting bolts, and remove the park/neutral switch.
To install:
- Install the park/neutral switch over the manual shaft.
- Install the switch mounting bolts but do not tighten.
- Make sure the transmission manual shaft lever is positioned at the L position
(fully forward). Turn the manual shaft lever fully rearward, then return it
2 notches ( N position).
- Insert a 0.157 inch (4.0mm) pin through the holes of the switch and the
manual shaft lever.
- Tighten the switch mounting bolts to 22–35 inch lbs. (2.5–3.9
Nm). Remove the pin.
- Connect the electrical connector.
- Reinstall the shift control linkage.
- Safely lower the vehicle, connect the negative battery cable, and check
for proper operation.
- Disconnect the negative battery cable.
- Raise and safely support the vehicle.
- Disconnect the control linkage from the transmission manual shaft.
- Disconnect the wiring harness connector and remove the park/neutral switch
mounting bolts. Remove the switch from the manual shaft lever.
To install:
- Position the park/neutral switch over the manual shaft lever and install
the mounting bolts. Do not fully tighten the mounting bolts.
- Move the manual shaft lever to the N position.
- Remove the screw on the switch body and move the switch so the screw hole
is aligned with the small hole inside the switch. Check their alignment by
inserting a 0.079 in. (2.0mm) diameter pin through the holes.
- Tighten the switch mounting bolts to 43–61 inch lbs. (4.9–6.9
Nm).
- Install the screw in the park/neutral switch body and reconnect the wiring
harness connector.
- Reinstall the control linkage.
- Safely lower the vehicle, connect the negative battery cable, and check
for proper operation.
