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Home >> Cadillac >> 2003 >> CTS Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission Diagnosis - 5L40-E >> Diagnostic Tests >> DTC P0604: Internal Control Module Random Access Memory >> Test Description
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Test Description

The number below refers to the step number in the diagnostic procedure:

  1. 3  - This step eliminates the TCM software as a possible cause of the DTC. If the DTC continues to set after reprogramming, the fault is in the TCM hardware.

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