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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2011 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code in the table below and proceed to the appropriate information.

PRE-COLLISION SYSTEM

DTC Code Detection Item Trouble Area Refer to
B2000 Short to B+ in Seat Belt Motor RH Circuit 1. Front seat outer belt assembly RH
2. Wire harness (seat belt control ECU - front seat outer belt assembly RH)
3. Seat belt control ECU		 Refer to DTC B2000: Short to B+ in Seat Belt Motor RH Circuit
B2001 Short to GND in Seat Belt Motor RH Circuit 1. Front seat outer belt assembly RH
2. Wire harness (seat belt control ECU - front seat outer belt assembly RH)
3. Seat belt control ECU		 Refer to DTC B2001: Short to GND in Seat Belt Motor RH Circuit
B2002 Open in Seat Belt Motor RH Circuit 1. Front seat outer belt assembly RH
2. Wire harness (seat belt control ECU - front seat outer belt assembly RH)
3. Seat belt control ECU		 Refer to DTC B2002: Open in Seat Belt Motor RH Circuit
B2005 Short to B+ in Seat Belt Motor LH Circuit 1. Front seat outer belt assembly LH
2. Wire harness (seat belt control ECU - front seat outer belt assembly LH)
3. Seat belt control ECU		 Refer to DTC B2005: Short to B+ in Seat Belt Motor LH Circuit
B2006 Short to GND in Seat Belt Motor LH Circuit 1. Front seat outer belt assembly LH
2. Wire harness (seat belt control ECU - front seat outer belt assembly LH)
3. Seat belt control ECU		 Refer to DTC B2006: Short to GND in Seat Belt Motor LH Circuit
B2007 Open in Seat Belt Motor LH Circuit 1. Front seat outer belt assembly LH
2. Wire harness (seat belt control ECU - front seat outer belt assembly LH)
3. Seat belt control ECU		 Refer to DTC B2007: Open in Seat Belt Motor LH Circuit
B2015 Open in Right Side Upper MOS 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Harness or connector
2. PSB fuse
3. Seat belt control ECU		 Refer to DTC B2036: Power Supply Relay Malfunction Open
B2040 EEPROM Malfunction 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. Seat belt control ECU Refer to 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 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 1. CAN communication system
2. Millimeter wave radar sensor
3. Seat belt control ECU		 Refer to DTC B2055: Radar Sensor Malfunction
B2056 Axial Gap of Radar Sensor 1. CAN communication system
2. Millimeter wave radar sensor (axial adjustment)
3. Seat belt control ECU		 Refer to DTC B2056: Axial Gap of Radar Sensor
B2057 Yaw Rate Sensor 1. CAN communication system
2. Yaw rate and acceleration sensor
3. Distance control ECU
4. Seat belt control ECU		 Refer to DTC B2057: Yaw Rate Sensor
B2058 Steering Angle Sensor 1. CAN communication system
2. Steering angle sensor
3. Distance control ECU
4. Seat belt control ECU		 Refer to DTC B2058: Steering Angle Sensor
B2059 Vehicle Speed Malfunction 1. CAN communication system
2. Combination meter
3. ECM
4. Skid control ECU
5. Distance control ECU
6. Seat belt control ECU		 Refer to DTC B2059: Vehicle Speed Malfunction
B2060 ABS Malfunction 1. CAN communication system
2. Skid control ECU
3. Seat belt control ECU		 Refer to DTC B2060: ABS Malfunction
B2063 Buckle Switch Malfunction 1. Front seat inner belt assembly RH
2. Front seat inner belt assembly LH
3. Harness and connector
4. Floor wire
5. Seat belt control ECU
6. Center airbag sensor assembly
7. Occupant classification ECU
8. CAN communication system		 Refer to DTC B2063: Buckle Switch Malfunction
B2064 Vehicle Type Signal Malfunction 1. Gateway ECU
2. Seat belt control ECU		 Refer to DTC B2064: Vehicle Type Signal Malfunction
B2065 Distance Control ECU Malfunction 1. Distance control ECU
2. Seat belt control ECU		 Refer to DTC B2065: Distance Control ECU Malfunction
B2070 VSC Buzzer 1. Skid control buzzer
2. Skid control buzzer circuit
3. Seat belt control ECU		 Refer to DTC B2070: VSC Buzzer
B2071 Stop Light Control Relay Malfunction 1. Dynamic radar cruise control system
2. Seat belt control ECU		 Refer to DTC B2071: Stop Light Control Relay Malfunction
U0100 Lost Communication with ECM / PCM "A" 1. CAN communication system
2. ECM
3. Distance control ECU		 Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U0151: Lost Communication with Airbag ECU; DTC U1101: Lost Communication with Distance Control ECU
U0122 Lost Communication with Vehicle Dynamics Control Module 1. CAN communication system
2. Skid control ECU
3. Seat belt control ECU		 Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U0151: Lost Communication with Airbag ECU; DTC U1101: Lost Communication with Distance Control ECU
U0146 Lost Communication with Gateway "A" 1. CAN communication system
2. Gateway ECU
3. Seat belt control ECU		 Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U0151: Lost Communication with Airbag ECU; DTC U1101: Lost Communication with Distance Control ECU
U0151 Lost Communication with Airbag ECU 1. CAN communication system
2. Center airbag sensor assembly
3. Seat belt control ECU		 Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U0151: Lost Communication with Airbag ECU; DTC U1101: Lost Communication with Distance Control ECU
U0235 Lost Communication with Cruise Control Front Distance Range Sensor 1. Communication circuit
2. Millimeter wave radar sensor
3. Distance control ECU
4. Seat belt control ECU		 Refer to DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U1102: Lost Communication with Radar Sensor
U1101 Lost Communication with Distance Control ECU 1. CAN communication system
2. Distance control ECU
3. Seat belt control ECU		 Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0146: Lost Communication with Gateway "A"; DTC U0151: Lost Communication with Airbag ECU; DTC U1101: Lost Communication with Distance Control ECU
U1102 Lost Communication with Radar Sensor 1. Communication circuit
2. Distance control ECU
3. Millimeter wave radar sensor		 Refer to DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U1102: Lost Communication with Radar Sensor
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