MULTIPLEX COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during DTC check, check the circuit corresponding to the code in the table below. Proceed to the page given for the circuit.
| DTC Code | Detection Item | Trouble Area | See page |
|---|---|---|---|
| B1200 | MPX Body ECU Stop | 1. Main Body ECU RH (cowl side junction block RH) 2. Wire harness or connector |
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| B1205 | AFS ECU Communication Stop | 1. AFS ECU 2. Wire harness or connector |
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| B1206 | P/W Master Switch Communication Stop | 1. Multiplex network master switch 2. Wire harness or connector |
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| B1207 | Smart ECU Stop | 1. Certification ECU (smart key ECU assembly) 2. Wire harness or connector |
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| B1208 | Passenger Side Outer Mirror ECU | 1. Outer mirror control ECU (Passenger side) 2. Wire harness or connector |
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| B1209 | Driver Side Outer Mirror | 1. Outer mirror control ECU (Driver side) 2. Wire harness or connector |
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| B1210 | Power ECU Stop | 1. Power source control ECU 2. Wire harness or connector |
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| B1213 | Tilt and Telescopic ECU Communication Stop | 1. Multiplex tilt and telescopic ECU 2. Wire harness or connector |
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| B1214 | Short to B+ in Door System Communication Bus Malfunction | 1. Main body ECU RH (Cowl side junction block RH) 2. Gateway ECU 3. Multiplex tilt and telescopic ECU 4. Windshield wiper switch assembly 5. Multiplex network switch (Front RH) 6. Multiplex network master switch 7. Certification ECU (Smart key ECU assembly) 8. Power source control ECU 9. Multiplex network switch (Rear LH) 10. Front power seat switch RH (Position control ECU) 11. Front power seat switch LH (Position control ECU) 12. Multiplex network switch (Rear RH) 13. Main body ECU LH (Cowl side junction block LH) 14. Outer mirror control ECU RH 15. Outer mirror control ECU LH 16. Front controller 17. Overhead junction block 18. Rain sensor 19. Sliding roof control ECU 20. Double lock door control relay 21. Wire harness or connector |
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| B1215 | Short to GND in Door System Communication Bus Malfunction | 1. Main body ECU RH (Cowl side junction block RH) 2. Gateway ECU 3. Multiplex tilt and telescopic ECU 4. Windshield wiper switch assembly 5. Multiplex network switch (Front RH) 6. Multiplex network master switch 7. Certification ECU (Smart key ECU assembly) 8. Power source control ECU 9. Multiplex network switch (Rear LH) 10. Front power seat switch RH (Position control ECU) 11. Front power seat switch LH (Position control ECU) 12. Multiplex network switch (Rear RH) 13. Main body ECU LH (Cowl side junction block LH) 14. Outer mirror control ECU RH 15. Outer mirror control ECU LH 16. Front controller 17. Overhead junction block 18. Rain sensor 19. Sliding roof control ECU 20. Double lock door control relay 21. Wire harness or connector |
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| B1248 | AVC-LAN Communication Impossible | 1. AVC-LAN (radio receiver or multi-display) 2. Wire harness or connector |
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| B1249 | Double Locking ECU Communication Stop | 1. Double lock door control relay 2. Wire harness or connector |
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| B1262 | A/C ECU Communication Stop | 1. A/C amplifier (A/C ECU) 2. Wire harness or connector |
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| B1266 | Short to B+ in Instrument Panel System Communication Bus Malfunction | 1. Gateway ECU 2. A/C amplifier 3. AFS ECU 4. Clearance warning ECU 5. Combination meter 6. Wire harness or connector |
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| B1267 | Short to GND in Instrument Panel System Communication Bus Malfunction | 1. Gateway ECU 2. A/C amplifier 3. AFS ECU 4. Clearance warning ECU 5. Combination meter 6. Wire harness or connector |
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| B1271 | Combination Meter ECU Communication Stop | 1. Combination meter 2. Wire harness or connector |
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| B1272 | Power Seat ECU Communication Stop | 1. Front power seat switch (position control ECU) (Driver seat ECU) 2. Wire harness or connector |
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| B1273 | Sliding Roof ECU Communication Stop | 1. Sliding roof control ECU 2. Wire harness or connector |
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| B1278 | Combination Switch ECU Communication Stop | 1. Windshield wiper switch assembly 2. Wire harness or connector |
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| B1279 | Rain Sensor Communication Stop | 1. Rain sensor 2. Wire harness or connector |
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| B1280 | Left Side Junction Block ECU Communication Stop | 1. Main body ECU LH (cowl side junction block LH) 2. Wire harness or connector |
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| B1289 | Passenger Seat ECU Communication Stop | 1. Front power seat switch (Position control ECU) (Passenger seat ECU) 2. Wire harness or connector |
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| B1296 | Front Light ECU Communication Stop | 1. Front controller 2. Wire harness or connector |
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| B1297 | Clearance Sonar ECU Communication Stop | 1. Clearance warning ECU 2. Wire harness or connector |
When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTCs (B1200, B1206, B1207, B1208, B1209, B1210, B1213, B1272, B1273, B1278, B1279, B1280,B1289 and B1296), please repair the "+B of GND short malfunction of communication bus" DTCs first.
When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop "DTCs (B1205, B1247, B1262, B1271 AND B1297), please repair the "+B or GND short malfunction of communication bus" DTCs first.