Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Saturn Astra L4-1.8LFACTORY OEM SERVICE PROCEDURE
Transmission Position Sensor/Switch: Adjustments
Transmission Range Switch Adjustment
Special Tools
KM-962-A /KM-962-10 Tester
Removal Procedure
1. Remove the battery.
* Disconnect the negative cable (2) from the battery.
Remove the nut.
* Disconnect the positive cable (3) from the battery.
Remove the nut.
* Remove the bracket (1).
Remove the bolt (4).
* Remove the battery.
2. Remove the battery tray.
* Release the cable tie.
* Remove the 3 bolts (1).
3. Remove the selector lever cable (3).
* Remove the selector cable from selector lever (4).
* Release the selector lever cable from the counterhold on the transmission.
* Open the retaining clamp (1) with a screwdriver.
4. Disconnect wiring harness plug of the selector lever position switch (2).
Open the locking shackle.
5. Install KM-962-A (5).
* Connect to the wiring harness plug of the selector lever position switch.
* Connect to the battery with KM-962-A (1).
Important: The light diodes corresponding to the markings on the insert module must light up for the selector lever position "N".
6. Inspect the setting of the selector lever position switch.
* Move the selector lever to the neutral position
* Turn the selector lever (3) clockwise as far as the stop.
* Twist back 2 notch positions ("P", "R", "N").
Important: Until all the light diodes corresponding to selector lever position "N" light up.
7. Adjust the selector lever position switch, if necessary.
* Release the 2 nuts (2 and 4).
* Twist the selector lever position switch.
Installation Procedure
Notice: Refer to Fastener Notice (Fastener Notice) .
1. Fasten the selector lever position switch.
Tighten the 2 bolts (1, 3) to 25 N.m (18 lb ft).
2. Inspect the setting of the selector lever position switch.
Important: The light diodes corresponding to the markings on the insert module must flash for each individual gear. Use plug-in check-display (4) for "AF TYPE" (arrow).
Shift through all the gears one after the other on the selector lever (2).
3. Connect and lock the selector lever position switch wiring harness plug (2).
* Disconnect KM-962-A from the battery.
* Disconnect KM-962-A from the selector lever position switch wiring harness plug.
Important: Ensure it is correctly engaged.
4. Install the selector cable (3).
* Install the selector cable to the selector lever (4).
* Connect the selector cable into the counterhold on the transmission.
* Install the retaining clamp (1).
5. Install the battery tray.
Fasten the cable tie.
Tighten the 3 bolts to 10 N.m (89 lb in).
6. Install the battery.
* Install the bracket (1).
Tighten the bolt (4) to 15 N.m (11 lb ft).
* Connect the positive cable (3) to the battery.
* Connect the negative cable (2) to the battery.
7. For programming procedures, refer to Control Module References (Programming and Relearning) .
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.