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DTC B1157: EEPROM fail
DTC B1158: ECU internal fail
 
 
 
 
DIAGNOSTIC FUNCTION
  • When an EEPROM writing/reading error of OSS-ECU is detected, OSS-ECU stores DTC B1157, and flashes the indicator of electric motor switch in amber.
  • When an error is detected to the microcomputer in OSS-ECU, OSS-ECU stores DTC B1158, and flashes the indicator of electric motor switch in amber.
 
 
DTC SET CONDITION
Check Conditions
  • After 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.
 
 
TROUBLESHOOTING HINT
  • Malfunction of OSS-ECU
 
 
DIAGNOSIS
Recheck for diagnostic trouble code.
(1) Erase the DTC.
(2) Turn the power supply mode of the electric motor switch from OFF to ON.
(3) Check if DTC is set.
(4) Turn the power supply mode of the electric motor switch from ON to OFF.
Is the DTC set?
Replace the OSS-ECU and register the VIN (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).