DTC B1157 OSS EEPROM fail
DTC B1158 OSS ECU internal fail
DIAGNOSTIC FUNCTION
- When an EEPROM writing/reading error of OSS-ECU is detected, OSS-ECU sets the DTC B1157, and flashes the indicator of engine switch in orange.
- When an error is detected to the microcomputer in OSS-ECU, OSS-ECU sets the DTC B1158, and flashes the indicator of engine switch in orange.
DTC SET CONDITION
Judgment Criterion
- When the following conditions are met:
- EEPROM writing/reading error is detected.
- ECU internal circuit error is detected.
DIAGNOSIS
Check whether the DTC is reset.