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.
2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
Section 145 (Multiplex Communication System)
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
- Description & Operation
- Component Locations
- Trouble Shooting
- Self-Diagnostic System
- Connector Identification
- Diagnostic Tests
- DTC B1211/11: Driver Door Ecu Communication Stop
- DTC B1212/12: Front Passenger Door Ecu Communication Stop
- DTC B1214/14: System Communication Bus Malfunction (+B Short) & DTC B1215/15: System Communication Bus Malfunction (GND Short)
- DTC B1216/16: Rear Right Door Ecu Communication Stop
- DTC B1217/17: Rear Left Door Ecu Communication Stop
- DTC B1221/21: Power Window Switch Circuit (Driver)
- DTC B1222/22: Door Lock Switch Circuit (Driver)
- DTC B1223/23: Power Window Switch Circuit (Passenger)
- DTC B1224/24: Door Lock Switch Circuit (Passenger)
- DTC B1225/25: Power Window Switch Circuit (Rear Right) & DTC B1226/26: Power Window Switch Circuit (Rear Left)
- DTC B1231/31: Jam Protection Limit Switch Circuit (Driver), DTC B1233/33: Jam Protection Limit Switch Circuit (Passenger), DTC B1235/35: Jam Protection Limit Switch Circuit (Rear Right) & DTC 1237/37: Jam Protection Limit Switch Circuit (Rear Left)
- DTC B1232/32: Jam Protection Pulse Switch Circuit (Driver), DTC B1234/34: Jam Protection Pulse Switch Circuit (Passenger), DTC B1236/36: Jam Protection Pulse Switch Circuit (Rear Right) & DTC 1238/38: Jam Protection Pulse Switch Circuit (Rear Left)
- DTC B1241/41: Body Ecu Switch Circuit Diagnosis
- DTC B1242/42: Wireless Door Lock Tuner Circuit Malfunction
- DTC B1244/44: Light Sensor Circuit Malfunction
- DTC B1256/56: Center Cluster Integration Panel Switch Circuit Diagnosis
- DTC B1261/61: ECM Communication Stop
- DTC B1272/72: Power Seat Ecu Communication Stop (W/ Seat Memory Only)
- DTC B1273/73: Moon Roof Ecu Communication Stop
- DTC B1275/75: Accessory Bus Buffer Communication Stop
- DTC B1276/76: A/C & Combination Meter Integrated Ecu Communication Stop
- DTC B1277/77: Center Cluster Integration Panel Communication Stop
- Removal & Installation
- Wiring Diagrams
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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