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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2009 Lexus GS 460 and 2009 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.
Pre-Collision System

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