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 DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSUSING THE SST (NGS TESTER)
1999 Mazda Protege LX L4-1.6L DOHC
Using the SST (NGS Tester)
1999 Mazda Protege LX L4-1.6L DOHCSECTION Using the SST (NGS Tester)
PCM INSPECTION USING THE SST (NGS TESTER)
NOTE: PIDs for the following parts are not available on this model. Go to the appropriate part inspection.
1. ECT sensor (Water temperature sender unit) (Refer to ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION.)
Testing and Inspection
2. CMP sensor (Refer to CAMSHAFT POSITION (CMP) SENSOR INSPECTION.)
Testing and Inspection
3. Main relay (Refer to MAIN RELAY INSPECTION.)
Testing and Inspection
1. Connect the NGS tester to the DLC-2. Refer to On-Board Diagnostic Test.)
2. Turn the ignition switch on.
3. Select the "PID/DATA MONITOR AND RECORD" function on the NGS display and press TRIGGER. Refer to On-Board Diagnostic Test, PID/DATA monitor and record procedure.)
4. Select the appropriate PID on the NGS display and press START.
5. Measure the PID value.
- If PID value is not within the specification, follow the instruction in Action column.
NOTE:
- Perform the SIMULATION TEST for the output device after PID/DATA measurement is completed.

- The simulation items that are used in the system inspection are as given in the table.






PID/DATA MONITOR TABLE (REFERENCE)
*1 : ATX only
*2 : MTX only
*3 : Except federal emission regulation applicable MTX models
*4 : California emission regulation applicable model
NOTE: PIDs for the following parts are not available on this model. Go to the appropriate part inspection.
1. ECT sensor (Water temperature sender unit) (Refer to ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION.)
Testing and Inspection
2. CMP sensor (Refer to CAMSHAFT POSITION (CMP) SENSOR INSPECTION.)
Testing and Inspection
3. Main relay (Refer to MAIN RELAY INSPECTION.)
Testing and Inspection
1. Connect the NGS tester to the DLC-2. Refer to On-Board Diagnostic Test.)
2. Turn the ignition switch on.
3. Select the "PID/DATA MONITOR AND RECORD" function on the NGS display and press TRIGGER. Refer to On-Board Diagnostic Test, PID/DATA monitor and record procedure.)
4. Select the appropriate PID on the NGS display and press START.
5. Measure the PID value.
- If PID value is not within the specification, follow the instruction in Action column.
NOTE:
- Perform the SIMULATION TEST for the output device after PID/DATA measurement is completed.
- The simulation items that are used in the system inspection are as given in the table.
PART 1 OF 6:
PART 2 OF 6:
PART 3 OF 6:
PART 4 OF 6:
PART 5 OF 6:
PART 6 OF 6:
PID/DATA MONITOR TABLE (REFERENCE)
*1 : ATX only
*2 : MTX only
*3 : Except federal emission regulation applicable MTX models
*4 : California emission regulation applicable model
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.