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Contents Wiring diagrams Section: Entertainment Systems All sections

Multiplex Communication: Diagnosis Lexus IS II

Entertainment Systems 21 illustrations ~4012 words

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

  1. Use this procedure to troubleshoot the multiplex communication system.
  2. The intelligent tester should be used in step 2 .
  1. VEHICLE BROUGHT TO WORKSHOP
  2. CHECK FOR DTC Check for DTCs and note any codes that are output. Delete the DTC. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests. Result RESULT DESCRIPTION TABLE Result Proceed to DTC does not reoccur A DTC reoccurs B B: GO TO «DIAGNOSTIC TROUBLE CODE TABLE»(ref-235578-S12945221252006062400000) A: Go to next step.
  3. OVERALL ANALYSIS AND TROUBLESHOOTING See «TERMINALS OF ECU»(ref-235578-S36724715152006062400000)
  4. ADJUST, REPAIR OR REPLACE
  5. CONFIRMATION TEST END

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Scheme 75: TERMINALS OF ECU
Scheme 75: TERMINALS OF ECU

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  1. CHECK MULTIPLEX NETWORK GATEWAY ECU Disconnect the multiplex network gateway ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (J76-1) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V IG (J76-1) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V ACC (J76-2) - Body ground O - Body ground Power source (ACC) Engine switch: off Below 1 V ACC (J76-2) - Body ground O - Body ground Power source (ACC) Engine switch: on (IG) 10 to 14 V BATT (J76-10) - Body ground LG - Body ground Power source (+B) Always 10 to 14 V MPI1 (J76-4) - Body ground BR - Body ground MPX line Always 10 k ohms or higher MPI2 (J76-13) - Body ground BR - Body ground MPX line Always 10 k ohms or higher MPD1 (J76-3) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPD2 (J76-12) - Body ground GR - Body ground MPX line Always 10 k ohms or higher GND (J76-24) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
  2. CHECK MAIN BODY ECU LH Disconnect the main body ECU LH connectors. Measure the voltage and resistance of the wire harness side connectors. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (LK-6) - Body ground Y - Body ground Power source (IG) Engine switch: off Below 1 V IG (LK-6) - Body ground Y - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V BKUP (LJ-23) - Body ground Y - Body ground Power source (+B) Always 10 to 14 V MPXB (LD-18) - Body ground LG - Body ground Power source (+B) Always 10 to 14 V GND (LD-3) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms SGND (LD-8) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms SGND (LD-9) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (Q3-15) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX2 (A30-17) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  3. CHECK MAIN BODY ECU RH Disconnect the main body ECU RH connectors. Measure the voltage and resistance of the wire harness side connectors. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (RA-1) - Body ground Y - Body ground Power source (IG) Engine switch: off Below 1 V IG (RA-1) - Body ground Y - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V ACC (RD-27) - Body ground O - Body ground Power source (ACC) Engine switch: off Below 1 V ACC (RD-27) - Body ground O - Body ground Power source (ACC) Engine switch: on (ACC) 10 to 14 V ALTB (RA-15) - Body ground SB - Body ground Power source (+B) Always 10 to 14 V BECU (RK-5) - Body ground G-R - Body ground Power source (+B) Always 10 to 14 V BATB (RN-1) - Body ground R - Body ground Power source (+B) Always 10 to 14 V GND2 (RD-11) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms GND2 (RD-7) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms GND2 (RA-4) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms GND2 (RA-5) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms GND1 (RD-17) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX5 (P1-5) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX6 (J75-20) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX4 (J75-19) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX1 (RA-20) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX1 (RJ-21) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX2 (J75-21) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  4. CHECK TILT AND TELESCOPIC ECU Disconnect the tilt and telescopic ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (J28-8) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V IG (J28-8) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V ECUB (J28-9) - Body ground LG - Body ground Power source (+B) Always 10 to 14 V +B (J28-2) - Body ground SB - Body ground Power source (+B) Always 10 to 14 V GND (J28-11) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (J28-5) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  5. CHECK POWER WINDOW MASTER SWITCH ECU Disconnect the power window master switch ECU connector. Measure the voltage and the resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition SIG (M7-20) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V SIG (M7-20) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V CPUB (M7-9) - Body ground G - Body ground Power source (+B) Always 10 to 14 V BDR (M7-10) - Body ground L - Body ground Power source (+B) Always 10 to 14 V GND (M7-2) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (M7-7) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX2 (M7-8) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  6. CHECK OUTER MIRROR CONTROL ECU LH Disconnect the outer mirror control ECU LH connector. Measure the voltage and the resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition SIG (M10-3) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V SIG (M10-3) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V CPUB (M10-4) - Body ground G - Body ground Power source (+B) Always 10 to 14 V BDR (M10-6) - Body ground L - Body ground Power source (+B) Always 10 to 14 V GND (M10-1) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (M10-8) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  7. CHECK POWER SEAT CONTROL ECU RH Disconnect the power seat control ECU RH connectors. Measure the voltage and resistance of the wire harness side connectors. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (T7-4) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V IG (T7-4) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V +B (T6-5) - Body ground L - Body ground Power source (+B) Always 10 to 14 V SYSB (T7-8) - Body ground P - Body ground Power source (+B) Always 10 to 14 V GND (T6-1) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (T7-1) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  8. CHECK CERTIFICATION ECU Disconnect the certification ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (P33-18) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V IG (P33-18) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V ACC (P33-19) - Body ground O - Body ground Power source (ACC) Engine switch: off Below 1 V ACC (P33-19) - Body ground O - Body ground Power source (ACC) Engine switch: on (IG) 10 to 14 V +B1 (P33-1) - Body ground L - Body ground Power source (+B) Always 10 to 14 V E (P33-17) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (P33-27) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX2 (P33-28) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  9. CHECK FRONT CONTROLLER ECU Disconnect the front controller ECU connectors. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition 2E-3 - Body ground B-Y - Body ground Power source (IG) Engine switch: off Below 1 V 2E-3 - Body ground B-Y - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V 2E-4 - Body ground G-R - Body ground Power source (+B) Always 10 to 14 V 2F-1 - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms 2F-6 - Body ground GR - Body ground MPX line Always 10 k ohms or higher 2F-5 - Body ground L - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  10. CHECK OUTER MIRROR CONTROL ECU RH Disconnect the outer mirror control ECU RH connector. Measure the voltage and the resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition SIG (L10-3) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V SIG (L10-3) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V CPUB (L10-4) - Body ground G - Body ground Power source (+B) Always 10 to 14 V BDR (L10-6) - Body ground L - Body ground Power source (+B) Always 10 to 14 V GND (L10-1) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (L10-8) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  11. CHECK POWER SEAT CONTROL ECU LH Disconnect the power seat control ECU LH connectors. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (U7-4) - Body ground Y - Body ground Power source (IG) Engine switch: off Below 1 V IG (U7-4) - Body ground Y - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V +B (U6-5) - Body ground L - Body ground Power source (+B) Always 10 to 14 V SYSB (U7-8) - Body ground LG - Body ground Power source (+B) Always 10 to 14 V GND (U6-1) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (U7-1) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  12. CHECK SLIDING ROOF CONTROL ECU Disconnect the sliding roof control ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbol (Terminal No. Wiring Color Terminal Description Condition Specified condition IG (R6-6) - Body ground V - Body ground Power source (IG) Engine switch: off Below 1 V IG (R6-6) - Body ground V - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V B (R6-5) - Body ground L - Body ground Power source (+B) Always 10 to 14 V E (R6-7) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (R6-10) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  13. CHECK RAIN SENSOR Disconnect the rain sensor connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbol (Terminal No. Wiring Color Terminal Description Condition Specified Condition SIG (R7-1) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V SIG (R7-1) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V MPX (R7-2) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  14. CHECK POWER SOURCE CONTROL ECU Disconnect the power source control ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition AM1 (J55-33) - Body ground O - Body ground Power source (+B) Always 10 to 14 V AM2 (J55-12) - Body ground O - Body ground Power source (+B) Always 10 to 14 V MPX1 (J55-7) - Body ground GR - Body ground MPX line Always 10 k ohms or higher MPX2 (J55-24) - Body ground GR - Body ground MPX line Always 10 k ohms or higher GND2 (J55-6) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
  15. CHECK WINDSHIELD WIPER SWITCH ASSEMBLY Disconnect the windshield wiper switch assembly connector. Measure the resistance and voltage of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (J26-2) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V IG (J26-2) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V B (J26-1) - Body ground LG - Body ground Power source (+B) Always 10 to 14 V E (J26-5) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX1 (J26-6) - Body ground GR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  16. CHECK COMBINATION METER ECU Disconnect the combination meter ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbol (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG+ (J34-12) - Body ground O - Body ground Power source (IG) Engine switch: off Below 1 V IG+ (J34-12) - Body ground O - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V B (J34-23) - Body ground L - Body ground Power source (+B) Always 10 to 14 V B (J34-24) - Body ground LG - Body ground Power source (+B) Always 10 to 14 V E2 (J34-1) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms ES (J34-13) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms MPX+ (J34-6) - Body ground BR - Body ground MPX line Always 10 k ohms or higher MPX- (J34-18) - Body ground BR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  17. CHECK CLEARANCE WARNING ECU Disconnect the clearance warning ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (Q37-8) - Body ground Y - Body ground Power source (IG) Engine switch: off Below 1 V IG (Q37-8) - Body ground Y - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V E (Q37-27) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms M+ (Q37-26) - Body ground BR - Body ground MPX line Always 10 k ohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
  18. CHECK AFS ECU Disconnect the AFS ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbol (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (A27-2) - Body ground B-O - Body ground Power source (IG) Engine switch: off Below 1 V IG (A27-2) - Body ground B-O - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V MPX1 (A27-5) - Body ground BR-R - Body ground MPX line Always 10 k ohms or higher MPX2 (A27-6) - Body ground BR - Body ground MPX line Always 10 k ohms or higher E1 (A27-1)- Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
  19. CHECK AIR CONDITIONING ECU Disconnect the air conditioning ECU connector. Measure the voltage and the resistance of the wire harness side connector. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG+ (J58-21) - Body ground B - Body ground Power source (IG) Engine switch: off Below 1 V IG+ (J58-21) - Body ground B - Body ground Power source (IG) Engine switch: on (IG) 10 to 14 V B (J58-1) - Body ground Y - Body ground Power source (+B) Always 10 to 14 V MPX+ (J58-30) - Body ground BR - Body ground MPX line Always 10 k ohms or higher MPX- (J58-31) - Body ground BR - Body ground MPX line Always 10 k ohms or higher GND (J58-20) - Body ground W-B - Body ground Ground for main power supply Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.

Scheme 94

Scheme 94: DIAGNOSIS SYSTEM
Scheme 94: DIAGNOSIS SYSTEM

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Scheme 95
  1. DESCRIPTION The network gateway ECU controls the functions of the multiplex communication system on the vehicle. Data of the multiplex communication system and the Diagnostic Trouble Codes (DTC) can be read through the Data Link Connector 3 (DLC3) of the vehicle.
  2. CHECK DLC3 The vehicle's ECU uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAEJ 1962 and matches the ISO 15765-4 format. TERMINAL DESCRIPTION AND CONDITION TABLE Symbols (Terminal No. Terminal Description Condition Specified Condition SIL (7) - SG (5) Bus "+" line During transmission Pulse generation CG (4) - Body ground Chassis ground Always Below 1 ohms SG (5) - Body ground Signal ground Always Below 1 ohms BAT (16) - Body ground Battery positive Always 11 to 14 V If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector. Intelligent tester HINT: Connect the cable of the intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle. If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.
  3. INSPECT BATTERY VOLTAGE Standard voltage: 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding.

DTC CHECK/CLEAR

  1. CHECK DTC Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Enter the following menus: DIAGNOSIS/OBD/ MOBD/BODY/DTC INFO. Check the DTCs on the tester screen. HINT: Refer to the intelligent tester operator's manual for further details.
  2. CLEAR DTC Connect the intelligent tester to the DLC3. Turn the engine switch on (IG). Erase the DTCs by following the prompts on the tester screen. Enter the following menus: DIAGNOSIS/OBD/ MOBD/BODY/DTC INFO. HINT: Refer to the intelligent tester operator's manual for further details.

DIAGNOSTIC TROUBLE CODE TABLE

If malfunction code is displayed during DTC check, check the circuit corresponding to the code in DETECTION ITEM AND TROUBLE AREA TABLE . Proceed to the reference given for the circuit.

DTC No.Detection ItemTrouble AreaReference
B1200MPX Body ECU StopMain body ECU RH Wire harnessDTC B1200 MPX Body ECU Stop
B1205AFS ECU Communication StopAFS ECU Wire harnessDTC B1205 AFS ECU Communication Stop
B1206P/W Master Switch Communication StopMultiplex network master switch Wire harnessDTC B1206 P/W Master Switch Communication Stop
B1207Smart ECU StopCertification ECU Wire harnessDTC B1207 Smart ECU Stop
B1208Passenger Side Outer Mirror ECUOuter mirror control ECU RH Wire harnessDTC B1208 Passenger Side Outer Mirror ECU
B1209Driver Side Outer MirrorOuter mirror control ECU LH Wire harnessDTC B1209 Driver Side Outer Mirror
B1210Power ECU StopPower source control ECU Wire harnessDTC B1210 Power ECU Stop
B1213Tilt and Telescopic ECU Communication StopTilt and telescopic ECU Wire harnessDTC B1213 Tilt and Telescopic ECU Communication Stop
B1214Short to B+ in Door System Communication Bus MalfunctionMain body ECU RH Gateway ECU Tilt and telescopic ECU Windshield wiper switch Power window switch (Front RH) Power window master switch Certification ECU Power source control ECU Power window switch (Rear LH) Position control ECU and Switch (Front RH seat) Position control ECU and Switch (Front LH seat) Power window switch (Rear RH) Main body ECU LH Outer mirror control ECU (RH) Outer mirror control ECU (LH) Front controller Overhead J/B Rain sensor Sliding roof control ECU Wire harnessDTC B1214: Short to B+ in Door System Communication Bus Malfunction
B1215Short to GND in Door System Communication Bus MalfunctionMain body ECU RH Gateway ECU Tilt and telescopic ECU Windshield wiper switch Power window switch (Front RH) Power window master switch Certification ECU Power source control ECU Power window switch (Rear LH) Position control ECU and Switch (Front RH seat) Position control ECU and Switch (Front LH seat) Power window switch (Rear RH) Main body ECU LH Outer mirror control ECU (RH) Outer mirror control ECU (LH) Front controller Overhead J/B Rain sensor Sliding roof control ECU Wire harnessDTC B1215: Short to GND in Door System Communication Bus Malfunction
B1247Tire Pressure Monitor Receiver Communication StopTire pressure warning ECU Wire harnessDTC B1247 Tire Pressure Monitor Receiver Communication Stop
B1248AVC-LAN Communication ImpossibleAVC-LAN (radio receiver assembly or multi-display assembly) Wire harnessDTC B1248 AVC-LAN Communication Impossible
B1262A/C ECU Communication StopAir conditioning amplifier (A/C ECU) Wire harnessDTC B1262 A/C ECU Communication Stop
B1266Short to B+ in Instrument Panel System Communication Bus MalfunctionGateway ECU Air conditioning amplifier (A/C ECU) AFS ECU Clearance warning ECU Combination meter ECU Tire pressure monitor ECU Wire harnessDTC B1266: Short to B+ in Instrument Panel System Communication Bus Malfunction
B1267Short to GND in Instrument Panel System Communication Bus MalfunctionGateway ECU Air conditioning amplifier (A/C ECU) AFS ECU Clearance warning ECU Combination meter ECU Tire pressure monitor ECU Wire harnessDTC B1267: Short to GND in Instrument Panel System Communication Bus Malfunction
B1271Combination Meter ECU Communication StopCombination meter ECU Wire harnessDTC B1271 Combination Meter ECU Communication Stop
B1272Power Seat ECU Communication StopPosition control ECU and switch Wire harnessDTC B1272 Power Seat ECU Communication Stop
B1273Sliding Roof ECU Communication StopSliding roof control ECU Wire harnessDTC B1273 Sliding Roof ECU Communication Stop
B1278Combination Switch ECU Communication StopCombination switch assembly Wire harnessDTC B1278 Combination Switch ECU Communication Stop
B1279Rain Sensor Communication StopRain sensor Wire harnessDTC B1279 Rain Sensor Communication Stop
B1280Left Side Junction Block ECU Communication StopMain body ECU LH (cowl side J/B LH) Wire harnessDTC B1280 Left Side Junction Block ECU Communication Stop
B1289Passenger Seat ECU Communication StopPosition control ECU and switch Wire harnessDTC B1289 Passenger Seat ECU Communication Stop
B1296Front Light ECU Communication StopFront controller Wire harnessDTC B1296 Front Light ECU Communication Stop
B1297Clearance Sonar ECU Communication StopClearance warning ECU Wire harnessDTC B1297 Clearance Sonar ECU Communication Stop

DETECTION ITEM AND TROUBLE AREA TABLE

When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop" DTCs (B1200, B1205, B1216, B1208, B1209, B1213, B1272, B1287 and B1294), please repair the "+B or GND short malfunction of communication bus" DTCs first.

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTCs (B1245, B1262, B1271, B1273, B1277, B1279 and B1281), please repair the "+B or GND short malfunction of communication bus" DTCs first.

INSPECTION PROCEDURE

  1. CHECK OPERATION Check for AVC-LAN communication DTCs. OK: AVC-LAN communication DTCs are not output, and there are no symptoms specified in the problem symptoms table. NG: GO TO «DIAGNOSTIC TROUBLE CODE TABLE»(ref-235589-S12087539672006062400000) or «DIAGNOSTIC TROUBLE CODE TABLE»(ref-235590-S21717822192006062400000) OK: REPLACE GATEWAY ECU

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