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 Clear Memory Mode using the Subaru Select Monitor. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Clear Memory Mode .
   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.