Code No.P0603: ECU system (EEPROM error)


OPERATION


A/T-ECU checks the EEPROM for any abnormality.

DIAGNOSIS CODE SET CONDITIONS


If an abnormality is detected with the EEPROM in the ECU (1 drive cycle), code No.P0603 is set.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set.

Q. Is diagnosis code No.P0603 set?
Replace the A/T-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction).