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.
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HOMESERVICE MANUALSMAZDA1999PROTEGE LX L4-1.6L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTRANSMISSION POSITION SENSOR/SWITCHTESTING AND INSPECTIONNEUTRAL SWITCH INSPECTION
1999 Mazda Protege LX L4-1.6L DOHC
Neutral Switch Inspection
1999 Mazda Protege LX L4-1.6L DOHCSECTION Neutral Switch Inspection
NOTE: Perform the following test only when directed.
1. Disconnect the negative battery cable.
2. Remove the neutral switch.
3. Inspect for continuity between the neutral switch terminals A and B using an ohmmeter.
Specification
- If not as specified, replace the neutral switch.
- If the neutral switch is okay, but PID value or PCM terminal 64 voltage are out of specification, inspect as follows.
1. Remove the PCM.
2. Connect the SST (104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.
Tightening torque
7.9 - 10.7 Nm (80 - 110 kg.cm, 69.5 - 95.4 in.lb)
4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.
- If there is an open or short circuit, repair or replace wiring harnesses.
- If there is no open or short circuit, replace the neutral switch.
Open circuit
- Power circuit (Neutral switch connector terminal A and PCM connector terminal 64 through common connector)
- Ground circuit (Neutral switch connector terminal B and Ground through common connector)
Short circuit
- Power circuit (Neutral switch connector terminal A and PCM terminal 64 through common connector to Ground)
4. Install the neutral switch.
1. Disconnect the negative battery cable.
2. Remove the neutral switch.
3. Inspect for continuity between the neutral switch terminals A and B using an ohmmeter.
Specification
- If not as specified, replace the neutral switch.
- If the neutral switch is okay, but PID value or PCM terminal 64 voltage are out of specification, inspect as follows.
1. Remove the PCM.
2. Connect the SST (104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.
Tightening torque
7.9 - 10.7 Nm (80 - 110 kg.cm, 69.5 - 95.4 in.lb)
4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.
- If there is an open or short circuit, repair or replace wiring harnesses.
- If there is no open or short circuit, replace the neutral switch.
Open circuit
- Power circuit (Neutral switch connector terminal A and PCM connector terminal 64 through common connector)
- Ground circuit (Neutral switch connector terminal B and Ground through common connector)
Short circuit
- Power circuit (Neutral switch connector terminal A and PCM terminal 64 through common connector to Ground)
4. Install the neutral switch.
RENDER: 1.0x
NO RELATED
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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.