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.
2012 Honda Accord L4-2.4LFACTORY OEM SERVICE PROCEDURE
Transmission Position Sensor/Switch: Testing and Inspection
Transmission Range Switch Test
1. Raise the vehicle on a lift, or apply the parking brake, block the rear wheels, and raise the front of the vehicle. Make sure it is securely supported.
2. Remove the left front wheel.
3. Disconnect the transmission range switch subharness connector (A), then remove the connector from the connector bracket (B).
4. Remove the harness clamps (C) from the clamp bracket (D).
5. Check for continuity between the terminals at the subharness connector. There should be continuity between the terminals in the following table for each shift lever position.
Transmission Range Switch Subharness Connector
6. Transmission range switch test is completed if the test results are OK, go to step 13.
If there is no continuity between any terminals, go to step 7.
7. Remove the transmission range switch cover.
8. Disconnect the transmission range switch connector.
9. Check for continuity between the terminals at the transmission range switch connector. There should be continuity between the terminals in the following table for each shift lever position.
Transmission Range Switch Connector
10. If the transmission range switch continuity check is OK, replace the faulty transmission range switch subharness, then go to step 13.
If there is no continuity between any terminals, go to step 11.
11. Remove the transmission range switch, and check the end of the selector control shaft (A).
12. If the measurements of the selector control shaft end are within the standard, replace the transmission range switch Service and Repair. If the measurements are out of the standard, repair the selector control shaft end, and recheck the transmission range switch continuity.
13. Check the connectors for corrosion, dirt, or oil, and clean or repair if necessary, then connect the connector securely.
14. Install the harness clamps to the clamp bracket.
15. Install the transmission range switch cover.
16. Install the left front wheel.
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.