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DTC C1608 EEPROM Fail
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
The ASC-ECU sets DTCs and failure information in the EEPROM*.
note*: EEPROM (Electrical Erasable and Programmable ROM)
 
 
 
DTC SET CONDITIONS
  • This DTC is set when the failure information stored in the EEPROM is not reliable. The failure information stored in the past is not output, and only this DTC is set.
  • This DTC may occur when ASC-ECU power supply shutdown or drop between ASC-ECU is writing a data to the EEPROM.
 
 
 
PROBABLE CAUSES
  • Disconnection of the ASC-ECU connector or the battery terminal when the ignition switch is ON
  • Loose battery terminal
  • Abnormality in battery
  • Damaged wiring harness and connectors
  • ASC-ECU malfunction
 
 
 
 
DIAGNOSIS
Check whether the DTC is set again.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
Is DTC C1608 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).