P1605

JATCO Fault P1605 - EEPROM Fault

P1605 - EEPROM error flag set.

Possible causes:
1. Internal ATCU ECU EEPROM fault.

1. Internal ATCU ECU EEPROM fault.
- The JATCO ECU has reported a failure with its internal reprogrammable memory. This fault may have been caused by re-programming the ECU at a high temperature.
- Ensure that the ECU has cooled to ambient temperature and, if TestBook available, re-program the unit as described under 'Vehicle Maintenance', 'ECU Checks & Renewal'. If this does not cure the problem, the ECU is probably faulty.