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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:
    1. EEPROM writing/reading error is detected.
    2. ECU internal circuit error is detected.
 
 
PROBABLE CAUSES
  • Malfunction of KOS&OSS-ECU
 
 
DIAGNOSIS
1. KOS&OSS-ECU DTC recheck