DTC P0604-44: Internal Control Module Random Access Memory (RAM) Error Data Memory Failure [05/2023 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

5. Turn the power switch off.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
2. Connect the cable to the negative (-) auxiliary battery terminal.
3. Connect the Techstream to the DLC3.
4. Turn the power switch on (IG).
5. Turn the Techstream on.
6. Wait 16 seconds or more.
7. Enter the following menus: Powertrain / Engine / Trouble Codes.
8. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTC P0604-44 is output	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [01/2017 - ] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [05/2023 - ]