Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2001 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Multiplex Control DTCS
MULTIPLEX DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| B1211 | Driver Door ECU To Body ECU Communication |
| B1212 | Passenger Front Door ECU To Body ECU Communication |
| B1213 | Tilt/Telescopic ECU To Body ECU Communication |
| B1214 | Door System Bus Communication Circuit Is Short To Power |
| B1215 | Door System Bus Communication Circuit Short To Ground |
| B1216 | Right Rear Door ECU To Body ECU Communication |
| B1217 | Left Rear Door ECU To Body ECU Communication |
| B1219 | Rear Seat Switch Communication Stop |
| B1248 | AVC-LAN Communication Impossible |
| B1261 | ECM To Body ECU Communication |
| B1262 | A/C Control Assembly To Body ECU Communication |
| B1263 | Luggage Room Junction Block ECU Communication Stop |
| B1266 | Instrument Panel System Bus Communication Circuit Short To Power |
| B1267 | Instrument Panel System Bus Communication Circuit Short To Ground |
| B1269 | Theft Deterrent ECU Communication Stop |
| B1271 | Combination Meter ECU To Body ECU Communication |
| B1272 | Power Seat ECU Communication |
| B1273 | Sliding Roof Control Relay To Body ECU Communication |
| B1275 | Accessory Bus Buffer To Body ECU Communication |
| B1277 | Center Cluster Integration Panel Communication Stop |
| B1278 | Combination Switch ECU Communication Stop |
| B1279 | Rain Sensor Communication Stop |
| B1281 | Air Bag ECU Communication Stop |
| B1282 | Skid Control ECU Communication Stop |
| B1283 | Driver Side Junction Block ECU Communication Stop |
| B1284 | Passenger Side Junction Block ECU Communication Stop |
| B1285 | Steering Pad Switch Communication Stop |
| B1291 | Light Control System Communication Bus Malfunction To Power |
| B1292 | Light Control System Communication Bus Malfunction To Ground |
| B1294 | Immobilizer ECU Communication Stop |
| B1296 | Front Light ECU Communication Stop |
| B1297 | Clearance Sonar ECU Communication Stop |
| B1298 | Right Rear Seat ECU Communication Stop |
| B1299 | Left Rear Seat ECU Communication Stop |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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