P0604
DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR1. OUTLINE OF DIAGNOSIS
Detect the function abnormality of the micro-computer (RAM).
Write zero to all area of RAM. After the zero initialization, judge NG when the result of addition of all values in area of RAM is not zero.
2. ENABLE CONDITION
Perform the diagnosis in the initial routine.
3. GENERAL DRIVING CYCLE
Perform the diagnosis immediately after IG key SW is turned ON.
4. DIAGNOSTIC METHOD
Judge NG when the malfunction criteria is completed, and judge OK when it is not completed.
5. DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed
6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed
7. FAIL SAFE
None
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)