DTC    B2015    Open in Right Side Upper MOS

DTC    B2016    Open in Right Side Lower MOS

DTC    B2020    Open in Left Side Upper MOS

DTC    B2021    Open in Left Side Lower MOS

DTC    B2025    Right Side Current Detection Circuit Malfunction Hi

DTC    B2026    Right Side Current Detection Circuit Malfunction Lo

DTC    B2027    Right Side Over-Current Malfunction

DTC    B2030    Left Side Current Detection Circuit Malfunction Hi

DTC    B2031    Left Side Current Detection Circuit Malfunction Lo

DTC    B2032    Left Side Over-Current Malfunction

DTC    B2035    Power Supply Relay Adherence Malfunction

DTC    B2036    Power Supply Relay Malfunction Open

DTC    B2040    EEPROM Malfunction

DTC    B2041    Fall of Raised Voltage

DTC    B2043    Fall of B+ Voltage

DTC    B2047    Pre-Crash Safety ECU Inner Circuit Malfunction


DESCRIPTION

The DTCs above are output during the seat belt control ECU's self diagnosis.

DTC No.
DTC Detection Condition
Trouble Area
B2015
Open in right side upper MOS
Seat belt control ECU
B2016
Open in right side lower MOS
Seat belt control ECU
B2020
Open in left side upper MOS
Seat belt control ECU
B2021
Open in left side lower MOS
Seat belt control ECU
B2025
Malfunction in right side current detection HI circuit
Seat belt control ECU
B2026
Malfunction in right side current detection LO circuit
Seat belt control ECU
B2027
Over-current in right side circuit
Seat belt control ECU
B2030
Malfunction in left side current detection HI circuit
Seat belt control ECU
B2031
Malfunction in left side current detection LO circuit
Seat belt control ECU
B2032
Over-current in left side circuit
Seat belt control ECU
B2035
Adherence in power supply relay
Seat belt control ECU
B2036
Open in power supply relay
Seat belt control ECU
B2040
EEPROM malfunction
Seat belt control ECU
B2041
Decline in raised voltage
Seat belt control ECU
B2043
Decline in B+ Voltage
Seat belt control ECU
B2047
Malfunction in the inner circuit of the pre-crash safety ECU
Seat belt control ECU

INSPECTION PROCEDURE

NOTICE:
When the seat belt control ECU is replaced with a new one, Active Test must be performed (Click here).

1.CHECK DTC

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the engine switch on (IG).

  1. Clear DTCs stored in memory (Click here).

  1. Turn the engine switch off.

  1. Turn the engine switch on (IG).

  1. Check for DTCs (Click here).

    OK:
    No DTC is output.



NG
REPLACE SEAT BELT CONTROL ECU
OK

USE SIMULATION METHOD TO CHECK