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DTC P0604: Internal Control Module Random Access Memory (RAM) Error: Troubleshooting

TROUBLESHOOTING REFERENCE CHART

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD II) System Check.
Is the check completed?		 - Go to Step 2 Go to ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK
2
  1. Install the scan tool.
  2. Turn the ignition ON, with the engine OFF.

Does the scan tool display P0604?		 - Go to Step 3 Go to DIAGNOSTIC AIDS
3
  1. Turn the ignition OFF.
  2. Replace the TCM.

Is the action complete?		 - Go to Step 4 -
4
  1. Using the scan tool, clear the DTCs.
  2. Road test the vehicle within the conditions for setting this DTC as specified in the text.

Does the scan tool indicate that this diagnostic has run and passed?		 - Go to Step 5 Go to Step 2
5 Check if any DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 - Go to applicable DTC table System OK
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