DTC B1157 EEPROM fail
DTC B1158 ECU internal error
DIAGNOSTIC FUNCTION
- When an EEPROM writing/reading error of KOS&OSS-ECU is detected, KOS&OSS-ECU sets DTC B1157, and flashes the indicator of engine switch in amber.
- When an error is detected to the microcomputer in KOS&OSS-ECU sets DTC B1158, and flashes the indicator of engine switch in amber.
JUDGMENT CRITERIA
Check Conditions
- After KOS&OSS-ECU activation
Judgment Criterion
- When the following conditions are met:
- EEPROM writing/reading error is detected.
- ECU internal circuit error is detected.
PROBABLE CAUSES
- Malfunction of KOS&OSS-ECU
DIAGNOSIS
1. KOS&OSS-ECU DTC recheck
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