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 MANUALSCHEVROLET2001METRO L4-079 1.3L VIN 2 MFIREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSPARK ADVANCE ADJUST TEST SWITCH
2001 Chevrolet Metro L4-079 1.3L VIN 2 MFI
Spark Advance Adjust Test Switch
2001 Chevrolet Metro L4-079 1.3L VIN 2 MFISECTION Spark Advance Adjust Test Switch
When the duty check data link connector Test Switch Terminal (terminal 5) is grounded, the Spark Advance Adjust Test Switch parameter will display On. Grounding the duty check data link connector Test Switch Terminal causes the ignition timing to be fixed at the base setting.
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.