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LIN Communication System (Diagnostic Codes): Overview Lexus CT I

Communication Devices 12 illustrations ~446 words

DESCRIPTION

This DTC is stored when LIN communication between the multiplex network master switch assembly and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B1206No communication between multiplex network master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more.Multiplex network master switch assembly Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector D FR DOOR fuse

Scheme 91

Scheme 91: WIRING DIAGRAM

This DTC is stored when LIN communication between the sliding roof ECU (sliding roof drive gear assembly) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B1273No communication between sliding roof ECU (sliding roof drive gear assembly) and main body ECU (multiplex network body ECU) for 10 seconds or more.Sliding roof ECU (sliding roof drive gear assembly) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector S/ROOF fuse

Scheme 92

Scheme 92: WIRING DIAGRAM

This DTC is stored when there is an open, short or ECU communication malfunction between the power management control ECU and certification ECU (smart key ECU assembly).

DTC No.DTC Detection ConditionTrouble Area
B2287There is an open, short or ECU communication malfunction between power management control ECU and certification ECU (smart key ECU assembly).Power management control ECU Certification ECU (smart key ECU assembly) Wire harness or connector

Scheme 93

Scheme 93: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for driver side) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B2321No communication between power window regulator motor assembly (for driver side) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for driver side) Main body ECU (multiplex network body ECU) Multiplex network master switch assembly Wire harness or connector D FR DOOR fuse

Scheme 94

Scheme 94: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for front passenger side) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B2322No communication between power window regulator motor assembly (for front passenger side) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for front passenger side) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector P FR DOOR fuse

Scheme 95

Scheme 95: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for rear RH side) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B2323No communication between power window regulator motor assembly (for rear RH side) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for rear RH side) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector DOOR RR fuse

Scheme 96

Scheme 96: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for rear LH side) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B2324No communication between power window regulator motor assembly (for rear LH side) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for rear LH side) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector DOOR RL fuse

Scheme 97

Scheme 97: WIRING DIAGRAM

The main body ECU (multiplex network body ECU) monitors communication between all the ECUs connected to the door bus lines. When the main body ECU (multiplex network body ECU) detects errors in communication with all the ECUs connected to the door bus lines at 2.6-second intervals and 3 times in a row, DTC B2325 will be stored.

DTC No.DTC Detection ConditionTrouble Area
B2325Main body ECU (multiplex network body ECU) detects errors in communication with the ECUs connected to the door bus lines 3 times in a row.Power window regulator motor assembly (for driver side) Power window regulator motor assembly (for front passenger side) Power window regulator motor assembly (for rear RH side) Power window regulator motor assembly (for rear LH side) Multiplex network master switch assembly Sliding roof ECU (sliding roof drive gear assembly)*1 Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector
  1. *1: w/ Sliding Roof System

Scheme 98

Scheme 98: WIRING DIAGRAM

The certification ECU (smart key ECU assembly) monitors communication between all the ECUs connected to the certification bus lines. When the certification ECU (smart key ECU assembly) detects errors in communication with all the ECUs connected to the certification bus lines at a set interval and 3 times in a row, DTC B2785 will be stored.

DTC No.DTC Detection ConditionTrouble Area
B2785Errors in LIN communication between ECUs or an open or short in communication lines LIN communication from the certification ECU (smart key ECU assembly) detects errors in communication 3 times in a row.Certification ECU (smart key ECU assembly) Power management control ECU Transmission control ECU assembly ID code box (immobilizer code ECU) Wire harness or connector

Scheme 99

Scheme 99: WIRING DIAGRAM

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and transmission control ECU assembly stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B2786No communication between transmission control ECU assembly and certification ECU (smart key ECU assembly) for 10 seconds or more.Transmission control ECU assembly Certification ECU (smart key ECU assembly) Wire harness or connector P CON MAIN fuse

Scheme 100

Scheme 100: WIRING DIAGRAM

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU) stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B2789No communication between certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU) for 10 seconds or more.ID code box (immobilizer code ECU) Certification ECU (smart key ECU assembly) Wire harness or connector ECU-B2 fuse

Scheme 101

Scheme 101: WIRING DIAGRAM

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B278CNo communication between the certification ECU (smart key ECU assembly) and power management control ECU for 10 seconds or more.Power management control ECU Certification ECU (smart key ECU assembly) Wire harness or connector AM2 fuse

Scheme 102

Scheme 102: WIRING DIAGRAM

See also:
REMOVAL