P0603

DTC P0603: EEPROM Malfunction

TECHNICAL DESCRIPTION
- ECM or PCM stored the information such as the idle learned value and so on in the memory of ECM or PCM.

DESCRIPTIONS OF MONITOR METHODS
To check whether the information such as the idle learned value and so on is stored in the memory of ECM or PCM.

MONITOR EXECUTION
Once per driving cycle

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
- Not applicable
Sensor (The sensor below is determined to be normal)
- Not applicable

DTC SET CONDITIONS

Logic Flow Chart:

Check Conditions
- Ignition switch is in "ON" position.

Judgement Criteria
- The latest data that was flashed while the ignition switch was in "LOCK" (OFF) position are not stored correctly.

OBD-II DRIVE CYCLE PATTERN
None.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- PCM failed.

DIAGNOSIS
Required Special Tool:
- MB991502: Scan tool (MUT-II)




STEP 1. Using scan tool MB991958, read the diagnostic trouble code (DTC)

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"(OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. After the DTC has been deleted, read the DTC again.
4. Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is DTC P0603 set?

YES: Replace the PCM.
NO: It can be assumed that this malfunction is intermittent. Refer to INTRODUCTION, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions.