The TCU check ROM I.D all the time, in order to maintain for best condition and surrounding.
The TCU set this code When the ROM I.D is changed by external force or input non-available data.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check sum fault | ● Faulty TCM |
Enable Conditions | ● IG "ON" | |
Threshold Value | ● CAN message transfer error | |
Diagnostic Time | ● More than 1sec | |
Fail safe |
Connect scantool to data link connector(DLC).
Ignition "ON".
Confirm the "ROM I.D".
Perform the "ROM UP-DATE".
Perform the Re-diagnosis.
Is "DTC" disappeared?
▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM/TCM's connector or was repaired and PCM/TCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
▶ Replace PCM/TCM as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition "OFF"
Disconnect ECM connector
Ignition "ON"
Measure voltage between terminal 6 of the ECM harness connector and chassis ground
Specification : Remain stable at battery voltage
Are circuits remaining stable at battery voltage?
▶ Using a scan tool, check ECM software version and upgrade as necessary. If version is the newest one, check ECM for contamination, deterioration, or damage. Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.
It is necessary to perform the TPS adaptation procedure with Scan tool when the throttle body assembly or ECM is replaced.
■ TPS adaptation procedure
1. Erase previous TPS adaptation value using Scan tool.
2. Ignition "OFF" and then "ON" without cranking. Wait for 10 seconds under enable conditions
Enable conditions : Battery ＞10V ＆ Intake Air Temp.＞5.3℃(41.5℉) ＆ 5.3℃(41.5℉) ＜Engine CoolantTemp. ＜99.8℃(211.6℉)
3. After TPS adaptation, the system normality should be confirmed by reading out "FMY" on the Scan Tool
▶ If voltage fluctuates, check circuit for loose, bent or corroded terminals, Repair as necessary and go to "Verification of Vehicle Repair" procedure
After a repair, it is essential to verify that the fault has been corrected.
Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode
Using a scantool, clear DTC
Operate the vehicle within DTC Enable conditions in general information.
Are any DTCs present ?
▶ Go to the applicable troubleshooting procedure.
▶ System performing to specification at this time.
