Transmission Position Sensor/Switch: Testing and Inspection
NEUTRAL SWITCHNeutral Switch:
1. Disconnect neutral switch connector.
2. Check switch continuity with an ohmmeter. With transmission in neutral, there should be continuity between switch terminals. With transmission in gear, there should be no continuity between switch terminals.
3. Reconnect neutral switch connector after testing or replacement.
CLUTCH SWITCH
Clutch Switch:
1. Disconnect clutch switch connector.
2. Check switch continuity with an ohmmeter. With clutch pedal depressed, there should be continuity between switch terminals. With clutch pedal released, there should be no continuity between switch terminals.
3. Reconnect clutch switch connector after testing or replacement.
Neutral and clutch switch input signal can be checked at ECU terminal 1V with ignition "ON." With transmission in neutral or clutch pedal depressed, terminal voltage should be approximately 0V. With transmission in forward gear or clutch pedal released, voltage should be approximately 12V.
If voltage is always approximately 0V, check for:
1. Defective neutral or clutch switch.
2. Short circuit in wiring from ECU terminal 1V to neutral or clutch switch.
3. Open circuit in wiring from ECU terminal 1V to neutral or clutch switch.
4. Poor contact at ECU connector.
5. Faulty ECU.