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LIN Communication System (Diagnostic Codes): Overview Lexus ES XV60

Communication Devices 11 illustrations ~432 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 ECU-B NO. 2 fuse

Scheme 123

Scheme 123: WIRING DIAGRAM

The main body ECU (multiplex network body ECU) communicates with the accessory ECUs via BERKES communication.

These DTCs are stored when communication between the main body ECU (multiplex network body ECU) and accessory ECU stops for 10 seconds or more.

DTC No.DTC Detection ConditionTrouble Area
B126ANo communication between main body ECU (multiplex network body ECU) and accessory ECU for 10 seconds or more.Accessory ECU Main body ECU (multiplex network body ECU) Wire harness or connector

Scheme 124

Scheme 124: WIRING DIAGRAM

This DTC is stored when LIN communication between the sliding roof ECU (sliding roof drive gear sub-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 sub-assembly) and main body ECU (multiplex network body ECU) for 10 seconds or more.Sliding roof ECU (sliding roof drive gear sub-assembly) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector S/ROOF fuse

Scheme 125

Scheme 125: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for driver door) 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 door) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for driver door) Main body ECU (multiplex network body ECU) Multiplex network master switch assembly Wire harness or connector DOOR F/L

Scheme 126

Scheme 126: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for front passenger door) 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 door) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for front passenger door) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector DOOR F/R fuse

Scheme 127

Scheme 127: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for rear RH door) 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 door) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for rear RH door) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector DOOR R/R fuse

Scheme 128

Scheme 128: WIRING DIAGRAM

This DTC is stored when LIN communication between the power window regulator motor assembly (for rear LH door) 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 door) and main body ECU (multiplex network body ECU) for 10 seconds or more.Power window regulator motor assembly (for rear LH door) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector DOOR R/L fuse

Scheme 129

Scheme 129: 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 door) Power window regulator motor assembly (for front passenger door) Power window regulator motor assembly (for rear RH door) Power window regulator motor assembly (for rear LH door) Multiplex network master switch assembly Sliding roof ECU (sliding roof drive gear sub-assembly) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector

Scheme 130

Scheme 130: 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) Steering lock ECU (steering lock actuator assembly) ID code box (immobilizer code ECU) Wire harness or connector

Scheme 131

Scheme 131: WIRING DIAGRAM

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

DTC No.DTC Detection ConditionTrouble Area
B2786No communication between steering lock ECU (steering lock actuator assembly) and certification ECU (smart key ECU assembly) for 10 seconds or more.Steering lock ECU (steering lock actuator assembly) Certification ECU (smart key ECU assembly) Wire harness or connector STRG LOCK fuse

Scheme 132

Scheme 132: 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 SMART fuse

Scheme 133

Scheme 133: WIRING DIAGRAM
DTC No.DTC Detection ConditionTrouble Area
B278CAn internal malfunction occurs in the certification ECU (smart key ECU assembly)Certification ECU (smart key ECU assembly)

See also:
REMOVAL [06/2012 - ]