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LIN Communication System (Diagnostic Codes & Symptom Tests): Overview Lexus GX J150

Communication Devices 15 illustrations ~695 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 CodeDTC Detection ConditionTrouble Area
B1206No communication between the 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) Harness or connector

Scheme 99

Scheme 99: WIRING DIAGRAM
  1. DTC B124D is stored when the main body ECU detects malfunctions in the LIN communication system.
  2. DTC B2432 is stored when the headlight swivel ECU (AFS ECU) detects malfunctions in the LIN communication system.
DTC CodeDTC Detection ConditionTrouble Area
B124DMalfunction in the LIN communication system.Inner rear view mirror assembly (automatic high beam sensor) Harness or connector Headlight swivel ECU assembly (AFS ECU)
B2432Malfunction in the LIN communication system.Inner rear view mirror assembly (automatic high beam sensor) Harness or connector Headlight swivel ECU assembly (AFS ECU)

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

DTC CodeDTC Detection ConditionTrouble Area
B1273No communication between the sliding roof drive gear sub-assembly and main body ECU (multiplex network body ECU) for 10 seconds or more.Sliding roof drive gear sub-assembly Main body ECU (multiplex network body ECU) Harness or connector

Scheme 100

Scheme 100: WIRING DIAGRAM
  1. DTC B2287 is stored when there is an open or short circuit or an ECU communication malfunction between the power management control ECU and certification ECU.
  2. DTC B278C is stored when LIN communication between the certification ECU and power management 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 management control ECU and certification ECU.Certification ECU Power management control ECU Harness or connector
B278CNo communication between the certification ECU and power management control ECU for 10 seconds or more.Certification ECU Power management control ECU Harness or connector

Scheme 101

Scheme 101: WIRING DIAGRAM

This DTC is stored when LIN communication between the front power window regulator motor assembly LH and main body ECU stops for 10 seconds or more.

DTC CodeDTC Detection ConditionTrouble Area
B2321No communication between the front power window regulator motor assembly LH and main body ECU for 10 seconds or more.Front power window regulator motor assembly LH Main body ECU Harness or connector

Scheme 102

Scheme 102: WIRING DIAGRAM

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

DTC CodeDTC Detection ConditionTrouble Area
B2322No communication between the front power window regulator motor assembly RH and main body ECU (multiplex network body ECU) for 10 seconds or more.Front power window regulator motor assembly RH Main body ECU (multiplex network body ECU) Harness or connector

Scheme 103

Scheme 103: WIRING DIAGRAM

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

DTC CodeDTC Detection ConditionTrouble Area
B2323No communication between the rear power window regulator motor assembly RH and main body ECU (multiplex network body ECU) for 10 seconds or more.Rear power window regulator motor assembly RH Main body ECU (multiplex network body ECU) Harness or connector

Scheme 104

Scheme 104: WIRING DIAGRAM

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

DTC CodeDTC Detection ConditionTrouble Area
B2324No communication between the rear power window regulator motor assembly LH and main body ECU (multiplex network body ECU) for 10 seconds or more.Rear power window regulator motor assembly LH Main body ECU (multiplex network body ECU) Harness or connector

Scheme 105

Scheme 105: WIRING DIAGRAM

The main body ECU (multiplex network body ECU) intermittently monitors the LIN communication bus between the components related to the doors and sliding roof drive gear sub-assembly. DTC B2325 is stored when a malfunction in the LIN communication bus between the components related to the doors and sliding roof drive gear sub-assembly is detected consecutively 3 times.

DTC CodeDTC Detection ConditionTrouble Area
B2325The main body ECU (multiplex network body ECU) detects a malfunction in the LIN communication bus between components related to the doors and sliding roof drive gear sub-assembly consecutively 3 times.Multiplex network master switch assembly Front power window regulator motor assembly LH Front power window regulator motor assembly RH Rear power window regulator motor assembly LH Rear power window regulator motor assembly RH Sliding roof drive gear sub-assembly Main body ECU (multiplex network body ECU) Harness or connector

Scheme 106

Scheme 106: WIRING DIAGRAM

These DTCs are stored when the headlight swivel ECU assembly (AFS ECU) detects errors in its own communications with the headlight assemblies (headlight swivel motors).

DTC CodeDTC Detection ConditionTrouble Area
B2410The headlight swivel ECU assembly (AFS ECU) detects errors in its own communication with the headlight assembly LH (headlight swivel motor LH).Headlight reflector LH (headlight swivel motor LH) Headlight swivel ECU assembly (AFS ECU) Harness or connector
B2411The headlight swivel ECU assembly (AFS ECU) detects errors in its own communication with the headlight assembly RH (headlight swivel motor RH).Headlight reflector RH (headlight swivel motor RH) Headlight swivel ECU assembly (AFS ECU) Harness or connector

The headlight leveling motor operates by receiving the signal from the headlight swivel ECU (AFS ECU). The headlight swivel ECU (AFS ECU) detects the headlight leveling motor status using the signal from the headlight leveling motor.

DTC CodeDTC Detection ConditionTrouble Area
B2424Malfunction in the headlight leveling motor LH. Open or short in the headlight leveling motor LH communication circuit.Headlight leveling motor LH Headlight swivel ECU assembly (AFS ECU) Harness or connector
B2425Malfunction in the headlight leveling motor RH. Open or short in the headlight leveling motor RH communication circuit.Headlight leveling motor RH Headlight swivel ECU assembly (AFS ECU) Harness or connector

This DTC is stored when LIN communication between the driving support switch control ECU and combination meter assembly stops 10 seconds or more.

DTC CodeDTC Detection ConditionTrouble Area
B2661No communication between the driving support switch control ECU and combination meter assembly for 10 seconds or more.Driving support switch control ECU Combination meter assembly Harness or connector

Scheme 107

Scheme 107: WIRING DIAGRAM

This DTC is stored when LIN communication between the driving support switch control ECU and accessory meter assembly stops for 10 seconds or more.

DTC CodeDTC Detection ConditionTrouble Area
B2662No communication between the driving support switch control ECU and accessory meter assembly for 10 seconds or more.Driving support switch control ECU Accessory meter assembly Harness or connector

Scheme 108

Scheme 108: WIRING DIAGRAM

The certification ECU 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 detects a malfunction in the LIN communication bus between components related to certification continuously 3 times.Certification ECU Power management control ECU ID code box Steering lock actuator assembly (steering lock ECU) Harness or connector

Scheme 109

Scheme 109: WIRING DIAGRAM

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

Scheme 110

Scheme 110: WIRING DIAGRAM

This DTC is output when LIN communication between the certification ECU and ID code box stops for 10 seconds or more.

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

Scheme 111

Scheme 111: WIRING DIAGRAM

When the auto wiper system is operated, the windshield wiper switch assembly uses LIN communication to communicate with the rain sensor. If the auto wiper system does not operate properly, a problem with the LIN communication between the windshield wiper switch assembly and rain sensor may be causing the malfunction.

Scheme 112

Scheme 112: WIRING DIAGRAM

When a switch of the heater control switch board*1 or No. 2 air conditioning control assembly*2 is operated, the heater control switch board*1 or No. 2 air conditioning control assembly*2 uses LIN communication to communicate with the air conditioning amplifier. If a switch of the heater control switch board*1 or No. 2 air conditioning control assembly*2 does not operate properly, a problem with the LIN communication between the heater control switch board*1 or No. 2 air conditioning control assembly*2 and air conditioning amplifier may be causing the malfunction.

  1. *1: w/o Navigation System
  2. *2: w/ Rear Air Conditioning System

Scheme 113

Scheme 113: WIRING DIAGRAM

See also:
DISASSEMBLY