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.
System Diagnosis
TCM monitors transaxle operation. TCM contains a self-diagnostic system which stores a DTC if a transaxle electronic control system failure or problem exists. If DTC is stored, TCM will turn on and blink "D4" light. See Figure . If a transaxle electronic control system failure or problem is suspected and "D4" light on A/T gear position indicator does not flash, see "D4" INDICATOR LIGHT CIRCUIT CHECK under DIAGNOSTIC TESTS. DTC can be retrieved using scan tool connected to Data Link Connector (DLC) located behind center console, behind ashtray. Flash code may also be retrieved for diagnosing transaxle electronic control system.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.