DTC P0604 Internal Control Module Random Access Memory (Ram) Error: Notes

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

TCM RAM malfunction

1. CHECK DTC. 
   1. Perform the memory clear using the Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>Clear memory .
   2. Read the DTC.

   Is DTC P0604 displayed?

   • Yes  : Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>Transmission Control Module (TCM) . Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>Transmission Control Module (TCM) .
   • No  : Current condition is normal. Check for interference from noise, etc.