Lexus IS250 IS220d GSE20 ALE20 - SUPPLEMENTAL RESTRAINT SYSTEM
AIRBAG SYSTEM - DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, check the circuit listed from the code in the table below (refer to the appropriate page).
- HINT:
When the SRS warning light remains on and the DTC output is the normal system code, a voltage source drop is likely to occur. This malfunction is not stored in the memory by the center airbag sensor assembly. If the power source voltage returns to normal, the SRS warning light will automatically go off.
When 2 or more codes are indicated, the code with the lower number appears first.
If a code is not listed on the display chart, the center airbag sensor may have failed.
In the case of any malfunction concerning an open circuit, short to ground, or short to B+ due to a squib, other trouble codes may not be detected. In this case, repair the malfunction currently indicated and then perform malfunction diagnosis again.
Mark in the check mode column:
*1: DTC is not corresponding to the check mode.
*2: DTC is corresponding to the check mode.
*1: DTC is not corresponding to the check mode.
*2: DTC is corresponding to the check mode.
| DTC No. | Detection Item | Trouble Area | Check Mode | See page |
| B1000/31 | Center Airbag Sensor Assembly Malfunction | Center airbag sensor assembly | *1 | |
| B1610/13 | Front Airbag Sensor RH Circuit Malfunction | 1. Instrument panel wire 2. Engine room main wire 3. Front airbag sensor RH 4. Center airbag sensor assembly | *1 | |
| B1615/14 | Front Airbag Sensor LH Circuit Malfunction | 1. Instrument panel wire 2. Engine room main wire 3. Front airbag sensor LH 4. Center airbag sensor assembly | *1 | |
| B1620/21 | Driver Side - Side Airbag Sensor Circuit Malfunction | 1. Floor wire No. 2 2. Driver side rear airbag sensor 3. Driver side - side airbag sensor 4. Center airbag sensor assembly | *1 | |
| B1625/22 | Front Passenger Side - Side Airbag Sensor Circuit Malfunction | 1. Floor wire 2. Front passenger side rear airbag sensor 3. Front passenger side - side airbag sensor 4. Center airbag sensor assembly | *1 | |
| B1630/23 | Driver Side Rear Airbag Sensor Circuit Malfunction | 1. Floor wire No. 2 2. Driver side - side airbag sensor 3. Driver side rear airbag sensor 4. Center airbag sensor assembly | *1 | |
| B1635/24 | Front Passenger Side Rear Airbag Sensor Circuit Malfunction | 1. Floor wire 2. Front passenger side - side airbag sensor 3. Front passenger side rear airbag sensor 4. Center airbag sensor assembly | *1 | |
| B1651/33 | Manual Cut off Switch Trouble | 1. Instrument panel wire 2. Airbag cut off switch cylinder 3. Center airbag sensor assembly | *1 | |
| B1653/35 | Seat Position Airbag Sensor Circuit Malfunction | 1. Floor wire No. 2 2. Seat position airbag sensor 3. Center airbag sensor assembly | *1 | |
| B1655/37 | Driver Side Seat Belt Buckle Switch Circuit Malfunction | 1. Floor wire No. 2 2. Front seat inner belt assembly (driver side) 3. Center airbag sensor assembly | *1 | |
| B1660/43 | Passenger Airbag ON / OFF Indicator Circuit Malfunction | 1. Instrument panel wire 2. Clock assembly 3. Center airbag sensor assembly | *1 | |
| B1800/51 | Short in Driver Side Squib Circuit | 1. Instrument panel wire 2. Spiral cable 3. Steering pad 4. Center airbag sensor assembly | *2 | |
| B1801/51 | Open in Driver Side Squib Circuit | Same as DTC No. B1800/51 | *2 | |
| B1802/51 | Short to GND in Driver Side Squib Circuit | Same as DTC No. B1800/51 | *2 | |
| B1803/51 | Short to B+ in Driver Side Squib Circuit | Same as DTC No. B1800/51 | *2 | |
| B1805/52 | Short in Front Passenger Side Squib Circuit | 1. Instrument panel wire 2. Instrument panel wire assembly 3. Front passenger airbag assembly 4. Center airbag sensor assembly | *2 | |
| B1806/52 | Open in Front Passenger Side Squib Circuit | Same as DTC No. B1805/52 | *2 | |
| B1807/52 | Short to GND in Front Passenger Side Squib Circuit | Same as DTC No. B1805/52 | *2 | |
| B1808/52 | Short to B+ in Front Passenger Side Squib Circuit | Same as DTC No. B1805/52 | *2 | |
| B1810/53 | Short in Driver Side Squib 2nd Step Circuit | 1. Instrument panel wire 2. Spiral cable 3. Steering pad 4. Center airbag sensor assembly | *2 | |
| B1811/53 | Open in Driver Side Squib 2nd Step Circuit | Same as DTC No. B1810/53 | *2 | |
| B1812/53 | Short to GND in Driver Side Squib 2nd Step Circuit | Same as DTC No. B1810/53 | *2 | |
| B1813/53 | Short to B+ in Driver Side Squib 2nd Step Circuit | Same as DTC No. B1810/53 | *2 | |
| B1815/54 | Short in Front Passenger Side Squib 2nd Step Circuit | 1. Instrument panel wire 2. Instrument panel wire assembly 3. Front passenger airbag assembly 4. Center airbag sensor assembly | *2 | |
| B1816/54 | Open in Front Passenger Side Squib 2nd Step Circuit | Same as DTC No. B1815/54 | *2 | |
| B1817/54 | Short to GND in Front Passenger Side Squib 2nd Step Circuit | Same as DTC No. B1815/54 | *2 | |
| B1818/54 | Short to B+ in Front Passenger Side Squib 2nd Step Circuit | Same as DTC No. B1815/54 | *2 | |
| B1820/55 | Short in Driver Side - Side Squib Circuit | 1. Floor wire No. 2 2. Front seat side airbag assembly (driver side) 3. Center airbag sensor assembly | *2 | |
| B1821/55 | Open in Driver Side - Side Squib Circuit | Same as DTC No. B1820/55 | *2 | |
| B1822/55 | Short to GND in Driver Side - Side Squib Circuit | Same as DTC No. B1820/55 | *2 | |
| B1823/55 | Short to B+ in Driver Side - Side Squib Circuit | Same as DTC No. B1820/55 | *2 | |
| B1825/56 | Short in Front Passenger Side - Side Squib Circuit | 1. Floor wire 2. Front seat side airbag assembly (front passenger side) 3. Center airbag sensor assembly | *2 | |
| B1826/56 | Open in Front Passenger Side - Side Squib Circuit | Same as DTC No. B1825/56 | *2 | |
| B1827/56 | Short to GND in Front Passenger Side - Side Squib Circuit | Same as DTC No. B1825/56 | *2 | |
| B1828/56 | Short to B+ in Front Passenger Side - Side Squib Circuit | Same as DTC No. B1825/56 | *2 | |
| B1830/57 | Short in Driver Side Curtain Shield Squib Circuit | 1. Floor wire No. 2 2. Curtain shield airbag assembly (driver side) 3. Center airbag sensor assembly | *2 | |
| B1831/57 | Open in Driver Side Curtain Shield Squib Circuit | Same as DTC No. B1830/57 | *2 | |
| B1832/57 | Short to GND in Driver Side Curtain Shield Squib Circuit | Same as DTC No. B1830/57 | *2 | |
| B1833/57 | Short to B+ in Driver Side Curtain Shield Squib Circuit | Same as DTC No. B1830/57 | *2 | |
| B1835/58 | Short in Front Passenger Side Curtain Shield Squib Circuit | 1. Floor wire 2. Curtain shield airbag assembly (front passenger side) 3. Center airbag sensor assembly | *2 | |
| B1836/58 | Open in Front Passenger Side Curtain Shield Squib Circuit | Same as DTC No. B1835/58 | *2 | |
| B1837/58 | Short to GND in Front Passenger Side Curtain Shield Squib Circuit | Same as DTC No. B1835/58 | *2 | |
| B1838/58 | Short to B+ in Front Passenger Side Curtain Shield Squib Circuit | Same as DTC No. B1835/58 | *2 | |
| B1860/64 | Short in Driver Side Knee Airbag Squib Circuit | 1. Instrument panel wire 2. Driver side knee airbag assembly 3. Center airbag sensor assembly | *2 | |
| B1861/64 | Open in Driver Side Knee Airbag Squib Circuit | Same as DTC No. B1860/64 | *2 | |
| B1862/64 | Short to GND in Driver Side Knee Airbag Squib Circuit | Same as DTC No. B1860/64 | *2 | |
| B1863/64 | Short to B+ in Driver Side Knee Airbag Squib Circuit | Same as DTC No. B1860/64 | *2 | |
| B1865/65 | Short in Front Passenger Side Knee Airbag Squib Circuit | 1. Instrument panel wire 2. Front passenger side knee airbag assembly 3. Center airbag sensor assembly | *2 | |
| B1866/65 | Open in Front Passenger Side Knee Airbag Squib Circuit | Same as DTC No. B1865/65 | *2 | |
| B1867/65 | Short to GND in Front Passenger Side Knee Airbag Squib Circuit | Same as DTC No. B1865/65 | *2 | |
| B1868/65 | Short to B+ in Front Passenger Side Knee Airbag Squib Circuit | Same as DTC No. B1865/65 | *2 | |
| B1900/73 | Short in Driver Side Front Pretensioner Squib Circuit | 1. Floor wire No. 2 2. Front seat outer belt assembly (driver side) 3. Center airbag sensor assembly | *2 | |
| B1901/73 | Open in Driver Side Front Pretensioner Squib Circuit | Same as DTC No. B1900/73 | *2 | |
| B1902/73 | Short to GND in Driver Side Front Pretensioner Squib Circuit | Same as DTC No. B1900/73 | *2 | |
| B1903/73 | Short to B+ in Driver Side Front Pretensioner Squib Circuit | Same as DTC No. B1900/73 | *2 | |
| B1905/74 | Short in Front Passenger Side Front Pretensioner Squib Circuit | 1. Floor wire 2. Front seat outer belt assembly (front passenger side) 3. Center airbag sensor assembly | *2 | |
| B1906/74 | Open in Front Passenger Side Front Pretensioner Squib Circuit | Same as DTC No. B1905/74 | *2 | |
| B1907/74 | Short to GND in Front Passenger Side Front Pretensioner Squib Circuit | Same as DTC No. B1905/74 | *2 | |
| B1908/74 | Short to B+ in Front Passenger Side Front Pretensioner Squib Circuit | Same as DTC No. B1905/74 | *2 | |
| B1920/77 | Short in Driver Side Rear Pretensioner Squib Circuit | 1. Floor wire No. 2 2. Rear seat outer belt assembly (driver side) 3. Center airbag sensor assembly | *2 | |
| B1921/77 | Open in Rear Pretensioner Squib RH Circuit | Same as DTC No. B1920/77 | *2 | |
| B1922/77 | Short to GND in Rear Pretensioner Squib RH Circuit | Same as DTC No. B1920/77 | *2 | |
| B1923/77 | Short to B+ in Rear Pretensioner Squib RH Circuit | Same as DTC No. B1920/77 | *2 | |
| B1925/78 | Short in Passenger Side Rear Pretensioner Squib Circuit | 1. Floor wire 2. Rear seat outer belt assembly (passenger side) 3. Center airbag sensor assembly | *2 | |
| B1926/78 | Open in Passenger Side Rear Pretensioner Squib Circuit | Same as DTC No. B1925/78 | *2 | |
| B1927/78 | Short to GND in Passenger Side Rear Pretensioner Squib Circuit | Same as DTC No. B1925/78 | *2 | |
| B1928/78 | Short to B+ in Passenger Side Rear Pretensioner Squib Circuit | Same as DTC No. B1925/78 | *2 |
LEXUS IS250, IS220d / GSE20 ALE20