Dtc B2015 Open In Right Side Upper Mos

Lexus IS250 IS220d GSE20 ALE20 - PRE-CRASH SAFETY

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC OUTPUT

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 B2036 Power Supply Relay Malfunction Open

DTC B2040 EEPROM Malfunction

DTC B2041 Fall of Raised Voltage

DTC B2043 Fall of B+ Voltage

DTC B2047 Seat Belt Control ECU Inner Circuit Malfunction

DESCRIPTION

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

DTC No.DTC Detection ConditionTrouble Area
B2015Open in right side upper MOSSeat belt control ECU
B2016Open in right side lower MOSSeat belt control ECU
B2020Open in left side upper MOSSeat belt control ECU
B2021Open in left side lower MOSSeat belt control ECU
B2025Malfunction in right side current detection HI circuitSeat belt control ECU
B2026Malfunction in right side current detection LO circuitSeat belt control ECU
B2027Over - current in right side circuitSeat belt control ECU
B2030Malfunction in left side current detection HI circuitSeat belt control ECU
B2031Malfunction in left side current detection LO circuitSeat belt control ECU
B2032Over - current in left side circuitSeat belt control ECU
B2036Open in power supply relaySeat belt control ECU
B2040EEPROM malfunctionSeat belt control ECU
B2041Decline in raised voltageSeat belt control ECU
B2043Fall of B+ VoltageSeat belt control ECU
B2047Malfunction in the inner circuit of the seat belt control ECUSeat belt control ECU

INSPECTION PROCEDURE

  • NOTICE:
  • When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed .
1.CHECK DTC OUTPUT

Turn the engine switch on (IG).

Clear the DTCs stored in memory .

Turn the engine switch off.

Turn the engine switch on (IG).

Check for the DTCs .

  • OK:
  • No DTC is output.
NG
REPLACE SEAT BELT CONTROL ECU
OK
USE SIMULATION METHOD TO CHECK