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 Acura TSX L4-2.4LFACTORY OEM SERVICE PROCEDURE
Transmission Position Sensor/Switch: Testing and Inspection
Transmission Range Switch Test
1. Remove the transmission range switch harness connector (A) from the connector bracket (B), then disconnect the connector.
2. Check for continuity between terminals at the harness connector. There should be continuity between the terminals in each switch position as shown in the table.
Transmission Range Switch Harness Connector
3. If there is no continuity between any terminals, remove the transmission range switch cover.
4. Disconnect transmission range switch connector.
5. Check for continuity between terminals at the switch connector. There should be continuity between the terminals in each switch position as shown in the table.
6. If the transmission range switch continuity check is OK, replace the faulty transmission range switch harness.
7. If there is no continuity between any terminals, remove the transmission range switch, and check the end of the selector control shaft (A).
8. If the measurement of the selector control shaft end is within the standard, replace the transmission range switch. If the measurement is out of the standard, repair the selector control shaft end, and recheck the transmission range switch continuity.
1. Remove the transmission range switch harness connector (A) from the connector bracket (B), then disconnect the connector.
2. Check for continuity between terminals at the harness connector. There should be continuity between the terminals in each switch position as shown in the table.
Transmission Range Switch Harness Connector
3. If there is no continuity between any terminals, remove the transmission range switch cover.
4. Disconnect transmission range switch connector.
5. Check for continuity between terminals at the switch connector. There should be continuity between the terminals in each switch position as shown in the table.
6. If the transmission range switch continuity check is OK, replace the faulty transmission range switch harness.
7. If there is no continuity between any terminals, remove the transmission range switch, and check the end of the selector control shaft (A).
8. If the measurement of the selector control shaft end is within the standard, replace the transmission range switch. If the measurement is out of the standard, repair the selector control shaft end, and recheck the transmission range switch continuity.
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.