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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2010 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

If a trouble code is indicated during the DTC check, check the circuit listed for that code in the table below. Then proceed to the appropriate service information.

PRE-COLLISION SYSTEM

DTC Code Detection Item Trouble Area See
B2000 Short to B+ in Seat Belt Motor RH Circuit - Wire harness (seat belt control ECU - front seat outer belt RH)
- Front seat outer belt RH
- Seat belt control ECU		 Refer toDTC B2000: Short to B+ in Seat Belt Motor RH Circuit
B2001 Short to GND in Seat Belt Motor RH Circuit - Wire harness (seat belt control ECU - front seat outer belt RH)
- Front seat outer belt RH
- Seat belt control ECU		 Refer toDTC B2001: Short to GND in Seat Belt Motor RH Circuit
B2002 Open in Seat Belt Motor RH Circuit - Wire harness (seat belt control ECU - front seat outer belt RH)
- Front seat outer belt RH
- Seat belt control ECU		 Refer toDTC B2002: Open in Seat Belt Motor RH Circuit
B2005 Short to B+ in Seat Belt Motor LH Circuit - Wire harness (seat belt control ECU - front seat outer belt LH)
- Front seat outer belt LH
- Seat belt control ECU		 Refer toDTC B2005: Short to B+ in Seat Belt Motor LH Circuit
B2006 Short to GND in Seat Belt Motor LH Circuit - Wire harness (seat belt control ECU - front seat outer belt LH)
- Front seat outer belt LH
- Seat belt control ECU		 Refer toDTC B2006: Short to GND in Seat Belt Motor LH Circuit
B2007 Open in Seat Belt Motor LH Circuit - Wire harness (seat belt control ECU - front seat outer belt LH)
- Front seat outer belt LH
- Seat belt control ECU		 Refer toDTC B2007: Open in Seat Belt Motor LH Circuit
B2015 Open in Right Side Upper MOS Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2016 Open in Right Side Lower MOS Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2020 Open in Left Side Upper MOS Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2021 Open in Left Side Lower MOS Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2025 Right Side Current Detection Circuit Malfunction Hi Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2026 Right Side Current Detection Circuit Malfunction Lo Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2027 Right Side Over-Current Malfunction Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2030 Left Side Current Detection Circuit Malfunction Hi Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2031 Left Side Current Detection Circuit Malfunction Lo Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2032 Left Side Over-Current Malfunction Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2035 Power Supply Relay Adherence Malfunction Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2036 Power Supply Relay Malfunction Open -Harness or connector
- PSB fuse
- Seat belt control ECU		 Refer toDTC B2036: Power Supply Relay Malfunction Open
B2040 EEPROM Malfunction Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2041 Fall of Raised Voltage Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2043 Fall of B+ Voltage Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2047 Seat Belt Control ECU Inner Circuit Malfunction Seat belt control ECU Refer toDTC 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 B2040: EEPROM Malfunction; DTC B2041: Fall of Raised Voltage; DTC B2043: Fall of B+ Voltage; DTC B2047: Seat Belt Control ECU Inner Circuit Malfunction
B2055 Radar Sensor Malfunction - CAN communication system
- Millimeter wave radar sensor
- Seat belt control ECU		 Refer toDTC B2055: Radar Sensor Malfunction
B2056 Axial Gap of Radar Sensor - CAN communication system
- Dynamic radar cruise control system (axial adjustment)
- Seat belt control ECU		 Refer toDTC B2056: Axial Gap of Radar Sensor
B2057 Yaw Rate Sensor - CAN communication system
- Yaw rate sensor
- Seat belt control ECU		 Refer toDTC B2057: Yaw Rate Sensor
B2058 Steering Angle Sensor - CAN communication system
- Steering angle sensor
- Distance control ECU
- Seat belt control ECU		 Refer toDTC B2058: Steering Angle Sensor
B2059 Vehicle Speed Malfunction - CAN communication system
- Combination meter assembly
- Distance control ECU
- Seat belt control ECU		 Refer toDTC B2059: Vehicle Speed Malfunction
B2060 ABS Malfunction - CAN communication system
- Electronically controlled brake system
- Seat belt control ECU		 Refer toDTC B2060: ABS Malfunction
B2063 Buckle Switch Malfunction - Front seat inner belt LH
- Floor wire
- Center airbag sensor
- Occupant classification ECU
- Front seat inner belt RH
- Multiplex communication system
- CAN communication system		 Refer toDTC B2063: Buckle Switch Malfunction
B2064 Vehicle Type Signal Malfunction - Gateway ECU
- Seat belt control ECU		 Refer toDTC B2064: Vehicle Type Signal Malfunction
B2065 Distance Control ECU Malfunction - Distance control ECU
- Seat belt control ECU		 Refer toDTC B2065: Distance Control ECU Malfunction
B2070 VSC Buzzer - Skid control buzzer
- Skid control buzzer circuit
- Seat belt control ECU		 Refer toDTC B2070: VSC Buzzer
B2071 Stop Light Control Relay Malfunction - Dynamic radar cruise control system
- Seat belt control ECU		 Refer toDTC B2071: Stop Light Control Relay Malfunction
U0100 Lost Communication with ECM / PCM "A" - CAN communication system
- Hybrid vehicle control ECU
- Distance control ECU		 Refer toDTC U0100: Lost Communication with ECM / PCM "A"; DTC U0293: Lost Communication with HV ECU
U0122 Lost Communication with Vehicle Dynamics Control Module - CAN communication system
- Skid control ECU
- Seat belt control ECU		 Refer toDTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U1101: Lost Communication with Distance Control ECU
U0146 Lost Communication with Gateway "A" - CAN communication system
- Gateway ECU
- Seat belt control ECU		 Refer toDTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U1101: Lost Communication with Distance Control ECU
U0235 Lost Communication with Cruise Control Front Distance Range Sensor - CAN communication system
- Millimeter wave radar sensor
- Distance control ECU		 Refer toDTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U1102: Lost Communication with Radar Sensor
U0293 Lost Communication with HV ECU - CAN communication system
- Hybrid vehicle control ECU
- Distance control ECU		 Refer toDTC U0100: Lost Communication with ECM / PCM "A"; DTC U0293: Lost Communication with HV ECU
U1101 Lost Communication with Distance Control ECU - CAN communication system
- Distance control ECU
- Seat belt control ECU		 Refer toDTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U1101: Lost Communication with Distance Control ECU
U1102 Lost Communication with Radar Sensor - CAN communication system
- Millimeter wave radar sensor
- Distance control ECU		 Refer toDTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U1102: Lost Communication with Radar Sensor
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