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.
Pinpoint Test Pc: Data Link Diagnostics Test
- PC1 DATA LINK DIAGNOSTICS TEST
- Key in ON position.
- Carry out the data link diagnostics test.
- Is system passed obtained?
Yes : The network test passed. If a single module NO RESPONSE/NOT EQUIPPED, RETURN to the Symptom Chart for the module in question and DIAGNOSE voltage and ground circuits.
If the module in question voltage and ground circuits are OK, GO to SYMPTOM CHART . If NO RESPONSE/NOT EQUIPPED from the PCM is reported, refer to INTRODUCTION - GASOLINE .
No : If high speed controller area network (CAN) circuit faults; all electronic control units no response/not equipped, GO to PINPOINT TEST N .
If medium speed CAN circuit faults; all electronic control units no response/not equipped, GO to PINPOINT TEST O .
If no response from the diagnostic tool, GO to PINPOINT TEST P .
If the module in question is no response/not equipped, GO to SYMPTOM CHART .
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.