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.