P0604

DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR

1. OUTLINE OF DIAGNOSIS
Detect the malfunction of microcomputer (RAM). Perform the zero clear operation to all normal RAM areas with the initial routine, and judge as NG when the sum of all added RAM after clearing is other than $0000.

2. ENABLE CONDITION






Diagnosis with the initial routine.

3. GENERAL DRIVING CYCLE
Perform the diagnosis immediately after turning ignition switch to ON.

4. DIAGNOSTIC METHOD
Judge as NG if the criteria below are met. Judge as OK and clear the NG if not established.