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.
Diagnosis And Testing: Diagnostics: Notes
| UV Leak Detector 164-R0756 or equivalent |
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| Pressure Gauge, Transmission Fluid 307-004 (T57L-77820-A) |
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| Alignment Gauge, TR Sensor 307-351 (T97L-70010-A) |
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| Transmission Test Plate and Gasket 307-433-01, 307-433-02, 307-433-03 |
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| 73 III Automotive Meter 105-R0057 or equivalent |
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| Trans Tester TR/MLP Overlay and Manual 007-00131 or equivalent |
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| Worldwide Diagnostic System (WDS) Vehicle Communication module (VCM) with appropriate adapters, or equivalent diagnostic tool |
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| MLP-TR Cable 418-F107 (007-00111) or equivalent |
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| Transmission Tester 307-F016 (007-00130) or equivalent |
Diagnosing electronically controlled automatic transmissions is simplified using the following procedures. It is important to remember that there is a definite procedure to follow. Do not take shortcuts or assume that critical checks or adjustments have already been made. Follow the procedures as written to avoid missing critical components or steps. By following the diagnostic sequence, the technician will be able to diagnose and repair the concern the first time.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
