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LIN Communication System (Diagnostic Codes): Overview Scion tC II

Communication Devices 5 illustrations ~246 words

DESCRIPTION

  1. DTC B1273 is stored when LIN communication between the sliding roof drive gear sub-assembly (sliding roof ECU) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.
  2. DTC B2325 is stored when the main body ECU (multiplex network body ECU) detects a malfunction in the LIN communication bus between components related to the sliding roof drive gear sub-assembly (sliding roof ECU) consecutively 3 times.
DTC CodeDTC Detection ConditionTrouble Area
B1273No communication between the sliding roof drive gear sub-assembly (sliding roof ECU) and main body ECU (multiplex network body ECU) for 10 seconds or more.Sliding roof drive gear sub-assembly (sliding roof ECU) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Harness or connector
B2325The main body ECU (multiplex network body ECU) detects a malfunction in the LIN communication bus between components related to the sliding roof drive gear sub-assembly (sliding roof ECU) consecutively 3 times.Sliding roof drive gear sub-assembly (sliding roof ECU) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Harness or connector

Scheme 43

Scheme 43: WIRING DIAGRAM
  1. DTC B2287 is stored when there is an open or short circuit or an ECU communication malfunction between the power source control ECU and certification ECU (smart key ECU assembly).
  2. DTC B278C is stored when LIN communication between the certification ECU (smart key ECU assembly) and power source control ECU stops for 10 seconds or more.
DTC CodeDTC Detection ConditionTrouble Area
B2287There is an open or short circuit or an ECU communication malfunction between the power source control ECU and certification ECU (smart key ECU assembly).Certification ECU (smart key ECU assembly) Power source control ECU Harness or connector
B278CNo communication between the certification ECU (smart key ECU assembly) and power source control ECU for 10 seconds or more.Certification ECU (smart key ECU assembly) Power source control ECU Harness or connector

Scheme 44

Scheme 44: WIRING DIAGRAM

The certification ECU (smart key ECU assembly) intermittently monitors the LIN communication bus between the components related to certification. DTC B2785 is stored when a malfunction in the LIN communication bus between the components related to certification is detected continuously 3 times.

DTC CodeDTC Detection ConditionTrouble Area
B2785The certification ECU (smart key ECU assembly) detects a malfunction in the LIN communication bus between components related to certification continuously 3 times.Certification ECU (smart key ECU assembly) Power source control ECU ID code box (immobiliser code ECU) Steering lock actuator assembly (steering lock ECU) Harness or connector

Scheme 45

Scheme 45: WIRING DIAGRAM

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

DTC CodeDTC Detection ConditionTrouble Area
B2786LIN communication between the certification ECU (smart key ECU assembly) and steering lock ECU stops for 10 seconds or more.Steering lock actuator assembly (steering lock ECU) Certification ECU (smart key ECU assembly) Harness or connector

Scheme 46

Scheme 46: WIRING DIAGRAM

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

DTC CodeDTC Detection ConditionTrouble Area
B2789No communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) for 10 seconds or more.ID code box (immobiliser code ECU) Certification ECU (smart key ECU assembly) Harness or connector

Scheme 47

Scheme 47: WIRING DIAGRAM

See also:
REMOVAL
DISASSEMBLY