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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1991PROTEGE L4-1839CC 1.8L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTRANSMISSION POSITION SENSOR/SWITCHTESTING AND INSPECTION
1991 Mazda Protege L4-1839cc 1.8L SOHC
Transmission Position Sensor/Switch: Testing and Inspection
1991 Mazda Protege L4-1839cc 1.8L SOHCSECTION Testing and Inspection
NEUTRAL SWITCH
1. Disconnect the 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
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 below 1.0V. With transmission in forward gear or clutch pedal released, voltage should be approximately 12V.
View: Neutral Switch:
1. Disconnect the 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 Inspection:
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 below 1.0V. With transmission in forward gear or clutch pedal released, voltage should be approximately 12V.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.