SFI SYSTEM(w/ EGR System), Diagnostic DTC:P0604
| DTC Code | DTC Name |
|---|---|
| P0604 | Random Access Memory (RAM) |
DESCRIPTION
The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. The ECM memory status is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standard, the ECM will illuminate the MIL and store a DTC immediately.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Memory |
|---|---|---|---|---|---|
P0604 |
Random Access Memory (RAM) |
ECM RAM errors (Main CPU and sub CPU mirroring failure) (1 trip detection logic). |
ECM |
Comes on |
DTC stored |
MONITOR STRATEGY
Required sensors/Components (Main) |
ECM |
Frequency of operation |
Continuous |
CONFIRMATION DRIVING PATTERN
Turn the engine switch off.
Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
Connect the cable to the negative (-) battery terminal.
Turn the engine switch on (IG) and wait for 16 seconds or more.
PROCEDURE
CHECK FOR DTC
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Clear DTCs.
Powertrain > Engine and ECT > Clear DTCs
Turn the tester off.
Turn the engine switch off.
Disconnect the intelligent tester.
Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
Connect the cable to the negative (-) battery terminal.
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Wait 16 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Check for DTCs.
Powertrain > Engine and ECT > Trouble Codes
OK
P0604 is not output.
Result
Result
OK
NG