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Multiplex Communication System (Diagnostic Codes): Overview Lexus IS II facelift 2

Communication Devices 20 illustrations ~555 words

DESCRIPTION

  1. This DTC is detected when communication between the main body ECU RH (cowl side J/B RH) and gateway ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1200Body ECU communication stopsMain body ECU RH (Cowl side J/B RH) Wire harness

Scheme 91

Scheme 91: WIRING DIAGRAM
  1. This DTC is detected when communication between the multiplex network master switch (power window master switch) and gateway ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1206Multiplex network master switch communication stopsMultiplex network master switch assembly (Power window master switch) Wire harness

Scheme 92

Scheme 92: WIRING DIAGRAM

HINT

This DTC is only output on vehicles equipped with a smart access with push-button start.

  1. This DTC is detected when communication between the certification ECU and gateway ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1207Certification ECU communication stopsCertification ECU Wire harness

Scheme 93

Scheme 93: WIRING DIAGRAM
  1. This DTC is detected when communication between the outer mirror control ECU RH (Passenger Side Outer Mirror ECU) and gateway ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1208Outer mirror control ECU RH communication stopsOuter mirror control ECU RH Wire harness

Scheme 94

Scheme 94: WIRING DIAGRAM
  1. This DTC is detected when communication between the outer mirror control ECU LH (Driver Side Outer Mirror) and gateway ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1209Outer mirror control ECU LH Communication stopsOuter mirror control ECU LH Wire harness

Scheme 95

Scheme 95: WIRING DIAGRAM

HINT

This DTC is only output on vehicles equipped with a smart access with push-button start.

  1. This DTC is detected when communication between the power source control ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1210Power source control ECU communication stopsPower source control ECU Wire harness

Scheme 96

Scheme 96: WIRING DIAGRAM
  1. This DTC is detected when communication between the tilt and telescopic ECU and the gateway ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1213Tilt and telescopic ECU communication stopsTilt and telescopic ECU Wire harness

Scheme 97

Scheme 97: WIRING DIAGRAM
  1. When a +B short circuit or body ground short circuit is detected on the door system communication bus (BEAN), BEAN is disabled and a DTC is output.
DTC No.DTC Detection ConditionTrouble Area
B1214Door system communication circuit and +B battery system shortMain body ECU RH Gateway ECU Tilt and telescopic ECU Windshield wiper switch Power window master switch Certification ECU Power source control ECU Position control ECU and switch (Front LH seat) 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 harness
B1215Door system communication circuit and body ground shortMain body ECU RH Gateway ECU Tilt and telescopic ECU Windshield wiper switch Power window master switch Certification ECU Power source control ECU Position control ECU and switch (Front LH seat) 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 harness

Scheme 98

Scheme 98: WIRING DIAGRAM

Scheme 99

Scheme 99

This DTC is detected when the communication between the tire pressure monitor ECU and gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1247Tire pressure warning ECU receiver communication stopsTire pressure monitor ECU Wire harness

Scheme 100

Scheme 100: WIRING DIAGRAM

This DTC is detected when communication between the AVC-LAN (radio receiver assembly or multimedia module receiver assembly) and multiplex network gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1248AVC-LAN communication is impossibleAVC-LAN (radio receiver assembly or multimedia module receiver assembly) Wire harness
  1. This DTC is detected when communication between the air conditioning amplifier (A/C ECU) and gateway ECU stops for more than 10 seconds.
DTC No.DTC Detection ConditionTrouble Area
B1262Air conditioning amplifier (A/C ECU) communication stopsAir conditioning amplifier (A/C ECU) Wire harness

Scheme 101

Scheme 101: WIRING DIAGRAM

When a +B short circuit or body ground short circuit is detected on the instrument panel system communication bus (BEAN), the instrument panel system communication bus (BEAN) is disabled and a DTC code is output.

DTC No.DTC Detection ConditionTrouble Area
B1266Instrument panel system communication circuit and +B battery system shortGateway ECU Air conditioning amplifier (A/C ECU) Clearance warning ECU Combination meter ECU Tire pressure monitor ECU Wire harness
B1267Instrument panel system communication circuit and body ground shortGateway ECU Air conditioning amplifier (A/C ECU) Clearance warning ECU Combination meter ECU Tire pressure monitor ECU Wire harness

Scheme 102

Scheme 102: WIRING DIAGRAM

This DTC is detected when communication between the combination meter ECU and multiplex network gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1271Combination meter ECU communication stopsCombination meter ECU Wire harness

Scheme 103

Scheme 103: WIRING DIAGRAM

This DTC is detected when communication between the position control ECU and switch (driver seat ECU) and multiplex network gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1272Position control ECU and switch (driver seat ECU) communication stopsPosition control ECU and switch (driver seat ECU) Wire harness

Scheme 104

Scheme 104: WIRING DIAGRAM

This DTC is detected when communication between the sliding roof control ECU and network gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1273Sliding roof control ECU communication stopsSliding roof control ECU Wire harness

Scheme 105

Scheme 105: WIRING DIAGRAM

This DTC is detected when communication between the combination switch (windshield wiper switch) and network gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1278Combination switch ECU communication stopsCombination switch assembly (windshield wiper switch) Wire harness

Scheme 106

Scheme 106: WIRING DIAGRAM

This DTC is detected when communication between the rain sensor and multiplex network gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1279Rain sensor communication stopsRain sensor Wire harness

Scheme 107

Scheme 107: WIRING DIAGRAM

This DTC is detected when communication between the main body ECU LH (cowl side J/B LH) and network gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1280Passenger side J/B ECU communication stopsMain body ECU LH (cowl side J/B LH) Wire harness

Scheme 108

Scheme 108: WIRING DIAGRAM

This DTC is detected when communication between the front controller and gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1296Front controller communication stopsFront controller Wire harness

Scheme 109

Scheme 109: WIRING DIAGRAM

This DTC is detected when communication between the clearance warning ECU and gateway ECU stops for more than 10 seconds.

DTC No.DTC Detection ConditionTrouble Area
B1297Clearance warning ECU communication stopsClearance warning ECU Wire harness

Scheme 110

Scheme 110: WIRING DIAGRAM