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.
Test Choice Selection
Selection of "DATA?", "INPUTS?", or "OVERRIDE?" test types will result in the first available test being displayed. See Figure . If dashes ever appear, this test is not allowed with the engine running.
Four characters of the display will contain a test code to identify the selection. The first 2 characters are letters which identify the system and the test type (i.e. ED for ECM data), last 2 characters numerically identify the test (i.e. ED01 for throttle position). When selecting a specific, the following actions may be taken to control the display:
- Pressing "OFF" button on CCDIC will stop the test selection process and return display to the next available test type for the selected system.
- Pressing the "LO" fan button will display the next smaller test number for the selected test type. If this button is touched with the lowest test number displayed, the highest test number will then appear.
- Pressing the "HI" fan button will display the next larger test number for the selected test type. If this button is touched with the highest test number displayed, the lowest test number will then appear.
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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.
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