Code No. B1157 OSS EEPROM fail
Code No. B1158 OSS ECU internal fail




DIAGNOSTIC FUNCTION




JUDGEMENT CRITERIA


Check Conditions
Judgment Criterion
  1. EEPROM writing/reading error is detected.
  2. ECU internal circuit error is detected.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


Check whether the diagnosis code is reset.


Q. Is the diagnosis code set?

Replace the OSS-ECU and register the chassis number (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).