P0604
DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR1. OUTLINE OF DIAGNOSIS
Detect the function abnormality of the micro-computer (RAM).
Normally, zero-clear all the RAM area in the initial routine. And judge NG when the total of all the RAM after the clear is not $0000
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 are completed. Judge OK and clear NG when the malfunction criteria are 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)