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

Communication Devices 36 illustrations ~1081 words

DESCRIPTION

DTC CodeDTC Detection ConditionTrouble Area
U0100There is no communication from the ECM.Power source or inside ECM ECM CAN main wire or connector ECM

Scheme 127

Scheme 127: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U0104There is no communication from the driving support ECU assembly.Power source or inside driving support ECU assembly Driving support ECU assembly CAN branch wire or connector Driving support ECU assembly
U1104There is no communication from the driving support ECU assembly.Power source or inside driving support ECU assembly Driving support ECU assembly CAN branch wire or connector Driving support ECU assembly
  1. For vehicles with a pre-collision system only.

Scheme 128

Scheme 128: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U0132There is no communication from the suspension control ECU.Power source or inside suspension control ECU Suspension control ECU CAN branch wire or connector Suspension control ECU
  1. For vehicles with an air suspension system only.

Scheme 129

Scheme 129: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U0139There is no communication from the stabilizer control ECU.Power source or inside stabilizer control ECU Stabilizer control ECU CAN branch wire or connector Stabilizer control ECU

Scheme 130

Scheme 130: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U0164There is no communication from the air conditioning amplifier assembly.Power source or inside air conditioning amplifier assembly Air conditioning amplifier assembly CAN branch wire or connector Air conditioning amplifier assembly

Scheme 131

Scheme 131: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U0182There is no communication from the headlight swivel ECU assembly (AFS ECU).Power source or inside headlight swivel ECU assembly (AFS ECU) Headlight swivel ECU assembly (AFS ECU) CAN branch wire or connector Headlight swivel ECU assembly (AFS ECU)
  1. For vehicles with an adaptive front-lighting system only.

Scheme 132

Scheme 132: WIRING DIAGRAM
DTC No.DTC Detection ConditionTrouble Area
U0199There is no communication from the outer mirror control ECU assembly RH.Power source circuit of outer mirror control ECU assembly RH Outer mirror control ECU assembly RH CAN branch wire or connector Outer mirror control ECU assembly RH

Scheme 133

Scheme 133: WIRING DIAGRAM
DTC No.DTC Detection ConditionTrouble Area
U0200There is no communication from the outer mirror control ECU assembly LH.Power source circuit of outer mirror control ECU assembly LH Outer mirror control ECU assembly LH CAN branch wire or connector Outer mirror control ECU LH assembly

Scheme 134

Scheme 134: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U0208There is no communication from the front power seat switch LH.Power source or inside front power seat switch LH Front power seat switch LH CAN branch wire or connector Front power seat switch LH

Scheme 135

Scheme 135: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U0235There is no communication from the millimeter wave radar sensor assembly.Power source circuit of millimeter wave radar sensor assembly Millimeter wave radar sensor assembly
U1102There is no communication from the millimeter wave radar sensor assembly.Power source circuit of millimeter wave radar sensor assembly Millimeter wave radar sensor assembly
  1. For vehicles with a pre-collision system only.

Scheme 136

Scheme 136: WIRING DIAGRAM
  1. The power management control ECU stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the V2 bus.
  2. When the power management control ECU receives a response signal from the ECUs connected to the V2 bus, the power management control ECU recognizes and memorizes that the ECU is connected to the V2 bus. Based on this memorized data, the power management control ECU monitors for malfunctions in the ECUs connected to the V2 bus when communicating with those ECUs. If the power management control ECU cannot receive response signals from the ECUs that have been memorized as those connected to the V2 bus, the power management control ECU determines that a malfunction exists.
  3. If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).
DTC CodeDTC Detection ConditionTrouble Area
U1002Lost communication with the gateway module (Power Management1).V2 bus circuit Parking assist ECU CAN branch wire or connector*1 Clearance warning ECU assembly CAN branch wire or connector*2 Driving support ECU assembly CAN branch wire or connector*3 Stabilizer control ECU CAN branch wire or connector Seat belt control ECU CAN branch wire or connector*3 Suspension control ECU CAN branch wire or connector*4 Headlight swivel ECU assembly (AFS ECU) CAN branch wire or connector*5 Power management control ECU CAN main wire or connector Parking assist ECU*1 Clearance warning ECU assembly*2 Driving support ECU assembly*3 Stabilizer control ECU Seat belt control ECU*3 Suspension control ECU*4 Headlight swivel ECU assembly (AFS ECU) *5 Power management control ECU No. 1 junction connector No. 3 junction connector No. 4 junction connector No. 5 junction connector
  1. *1: w/ Intuitive Parking Assist System (w/ Side Monitor System)
  2. *2: w/ Intuitive Parking Assist System (w/o Side Monitor System)
  3. *3: w/ Pre-collision System
  4. *4: w/ Air Suspension System
  5. *5: w/ Adaptive Front-lighting System

Scheme 137

Scheme 137: WIRING DIAGRAM

Scheme 138

Scheme 138
  1. The power management control ECU stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the power management bus.
  2. When the power management control ECU receives a response signal from the ECUs connected to the power management bus, the power management control ECU recognizes and memorizes that the ECU is connected to the power management bus. Based on this memorized data, the power management control ECU monitors for malfunctions in the ECUs connected to the power management bus when communicating with those ECUs. If the power management control ECU cannot receive response signals from the ECUs that have been memorized as those connected to the power management bus, the power management control ECU determines that a malfunction exists.
  3. If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).
DTC CodeDTC Detection ConditionTrouble Area
U1002Lost communication with the gateway module (Power Management2).Power management bus circuit Power management control ECU CAN main wire or connector ECM CAN main wire or connector Air conditioning amplifier assembly CAN branch wire or connector Power management control ECU ECM Air conditioning amplifier assembly No. 1 junction connector

Scheme 139

Scheme 139: WIRING DIAGRAM
  1. The main body ECU (multiplex network body ECU) stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the MS bus.
  2. When the main body ECU (multiplex network body ECU) receives a response signal from the ECUs connected to the MS bus, the main body ECU (multiplex network body ECU) recognizes and memorizes that the ECU is connected to the MS bus. Based on this memorized data, the main body ECU (multiplex network body ECU) monitors for malfunctions in the ECUs connected to the MS bus when communicating with those ECUs. If the main body ECU (multiplex network body ECU) cannot receive response signals from the ECUs that have been memorized as those connected to the MS bus, the main body ECU (multiplex network body ECU) determines that a malfunction exists.
  3. If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).
DTC CodeDTC Detection ConditionTrouble Area
U1002Lost communication with the gateway module (MS bus).MS bus circuit Main body ECU (multiplex network body ECU) CAN main wire or connector Front power seat switch LH CAN branch wire or connector Multiplex tilt and telescopic ECU CAN branch wire or connector Driving support switch control ECU CAN branch wire or connector Outer mirror control ECU assembly LH CAN branch wire or connector Outer mirror control ECU assembly RH CAN branch wire or connector Main body ECU (multiplex network body ECU) Front power seat switch LH Multiplex tilt and telescopic ECU Driving monitor switch control ECU Outer mirror control ECU assembly LH Outer mirror control ECU assembly RH No. 1 junction connector No. 3 junction connector No. 6 junction connector

Scheme 140

Scheme 140: WIRING DIAGRAM
  1. The driving support ECU assembly stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the sensor bus.
  2. When the driving support ECU assembly receives a response signal from the ECUs connected to the sensor bus, the driving support ECU assembly recognizes and memorizes that the ECU is connected to the sensor bus. Based on this memorized data, the driving support ECU assembly monitors for malfunctions in the ECUs connected to the sensor bus when communicating with those ECUs. If the driving support ECU assembly cannot receive response signals from the ECUs that have been memorized as those connected to the sensor bus, the driving support ECU assembly determines that a malfunction exists.
  3. If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).
DTC CodeDTC Detection ConditionTrouble Area
U1002Lost communication with the gateway module (sensor bus).Sensor bus circuit Millimeter wave radar sensor assembly CAN main wire or connector Driving support ECU assembly CAN main wire or connector Driver monitor ECU assembly CAN branch wire or connector*1 Lane recognition camera sensor assembly CAN branch wire or connector*2 Millimeter wave radar sensor assembly Driving support ECU assembly Driver monitor ECU assembly*1 Lane recognition camera sensor assembly*2 No. 3 junction connector
  1. For vehicles with pre-collision system only.
  2. *1: w/ Driver Monitor Camera
  3. *2: w/ Lane Departure Alert System

Scheme 141

Scheme 141: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U1100There is no communication from the seat belt control ECU.Power source or inside seat belt control ECU Seat belt control ECU CAN branch wire or connector Seat belt control ECU
  1. For vehicles with a pre-collision system only.

Scheme 142

Scheme 142: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U110BThere is no communication from the parking assist ECU.Power source or inside parking assist ECU Parking assist ECU CAN branch wire or connector Parking assist ECU
  1. For vehicles with an intuitive parking assist system (with side monitor system) only.

Scheme 143

Scheme 143: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U1110There is no communication from the clearance warning ECU assembly.Power source or inside clearance warning ECU assembly Clearance warning ECU assembly CAN branch wire or connector Clearance warning ECU assembly
  1. For vehicles with an intuitive parking assist system (without side monitor system) only.

Scheme 144

Scheme 144: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U1114There is no communication from the driving support switch control ECU.Power source or inside driving support switch control ECU Driving support switch control ECU CAN branch wire or connector Driving support switch control ECU

Scheme 145

Scheme 145: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U1115There is no communication from the multiplex tilt and telescopic ECU.Power source or inside multiplex tilt and telescopic ECU Multiplex tilt and telescopic ECU CAN branch wire or connector Multiplex tilt and telescopic ECU

Scheme 146

Scheme 146: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U1119There is no communication from the lane recognition camera sensor assembly.Power source or inside lane recognition camera sensor assembly Lane recognition camera sensor assembly CAN branch wire or connector Lane recognition camera sensor assembly
  1. For vehicles with a lane departure alert system only.

Scheme 147

Scheme 147: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
U1121There is no communication from the driver monitor ECU assembly.Power source or inside driver monitor ECU assembly Driver monitor ECU assembly CAN branch wire or connector Driver monitor ECU assembly
  1. For vehicles with a driver monitor camera only.

Scheme 148

Scheme 148: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Brake Actuator (Skid Control ECU) Communication Stop ModeEither condition is met: "ABS/VSC/TRAC" is not displayed on "CAN Bus Check". "Brake Actuator (Skid Control ECU) Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside master cylinder solenoid (skid control ECU) Master cylinder solenoid (skid control ECU) CAN branch wire or connector Master cylinder solenoid (skid control ECU)

Scheme 149

Scheme 149: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Steering Angle Sensor Communication Stop ModeEither condition is met: "Steering Angle Sensor" is not displayed on "CAN Bus Check". "Steering Angle Sensor Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside spiral with sensor cable sub-assembly Spiral with sensor cable sub-assembly CAN branch wire or connector Spiral with sensor cable sub-assembly

Scheme 150

Scheme 150: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Yaw Rate Sensor Communication Stop ModeEither condition is met: "Yaw Rate / Deceleration Sensor" is not displayed on "CAN Bus Check". "Yaw Rate Sensor Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside yaw rate sensor assembly Yaw rate sensor assembly CAN branch wire or connector Yaw rate sensor assembly

Scheme 151

Scheme 151: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
ECM Communication Stop ModeEither condition is met: "Engine" is not displayed on "CAN Bus Check". "ECM Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside ECM ECM

Scheme 152

Scheme 152: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Main Body ECU Communication Stop ModeEither condition is met: "Main Body" is not displayed on "CAN Bus Check". "Main Body ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside main body ECU (multiplex network body ECU) Main body ECU (multiplex network body ECU) CAN branch wire or connector Main body ECU (multiplex network body ECU)

Scheme 153

Scheme 153: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Power Management Control ECU Communication Stop ModeEither condition is met: "Power Management1" is not displayed on "CAN Bus Check". "Power Management Control ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside power management control ECU Power management control ECU CAN branch wire or connector Power management control ECU

Scheme 154

Scheme 154: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Combination Meter ECU Communication Stop ModeEither condition is met: "Combination Meter" is not displayed on "CAN Bus Check". "Combination Meter ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside combination meter assembly Combination meter assembly

Scheme 155

Scheme 155: WIRING DIAGRAM
Detection ItemSymptomsTrouble Area
Certification ECU Communication Stop ModeEither condition is met: "Smart Access / Smart Key / Wireless Tuner" is not displayed on "CAN Bus Check". "Certification ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside certification ECU Certification ECU CAN branch wire or connector Certification ECU

Scheme 156

Scheme 156: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Center Airbag Sensor Communication Stop ModeEither condition is met: "SRS Airbag" is not displayed on "CAN Bus Check". "Center Airbag Sensor Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside center airbag sensor assembly Center airbag sensor assembly CAN branch wire or connector Center airbag sensor assembly

Scheme 157

Scheme 157: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Display and Navigation Assembly Communication Stop ModeEither condition is met: "AVN1" is not displayed on "CAN Bus Check". "Display and Navigation Assembly Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside display and navigation module display Display and navigation module display CAN branch wire or connector Display and navigation module display
  1. For vehicles with a navigation system only.

Scheme 158

Scheme 158: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
4WD Control ECU Communication Stop ModeEither condition is met: "Four Wheel Drive Control" is not displayed on the "CAN Bus Check". "4WD Control ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source circuit of four wheel drive control ECU Four wheel drive control ECU CAN branch line or connector Four wheel drive control ECU

Scheme 159

Scheme 159: WIRING DIAGRAM

There may be an open circuit in the CAN main wire and/or DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 ohms or higher.

SymptomTrouble Area
The resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 ohms or higher.CAN main wire or connector No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 4 junction connector ECM Combination meter assembly DLC3 branch wire or connector

Scheme 160

Scheme 160: WIRING DIAGRAM

There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 ohms.

SymptomTrouble Area
The resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 ohms.Short between CAN bus lines ECM Certification ECU Four wheel drive control ECU Power management control ECU Display and navigation module display* Center airbag sensor assembly Spiral with sensor cable sub-assembly Yaw rate sensor assembly Main body ECU (multiplex network body ECU) Master cylinder solenoid (skid control ECU) Combination meter assembly No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 4 junction connector
  1. *: w/ Navigation System

Scheme 161

Scheme 161: WIRING DIAGRAM

Scheme 162

Scheme 162

There may be a short circuit between the CAN bus lines and +B when the resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kohms.

SymptomTrouble Area
The resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kohms.Short between CAN bus lines and +B ECM Certification ECU Four wheel drive control ECU Power management control ECU Display and navigation module display* Center airbag sensor assembly Spiral with sensor cable sub-assembly Yaw rate sensor assembly Main body ECU (multiplex network body ECU) Master cylinder solenoid (skid control ECU) Combination meter assembly No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 4 junction connector
  1. *: w/ Navigation System

There may be a short circuit between the CAN bus lines and GND when the resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 ohms.

SymptomTrouble Area
The resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 ohms.Short between CAN bus lines and GND ECM Certification ECU Four wheel drive control ECU Power management control ECU Display and navigation module display* Center airbag sensor assembly Spiral with sensor cable sub-assembly Yaw rate sensor assembly Main body ECU (multiplex network body ECU) Master cylinder solenoid (skid control ECU) Combination meter assembly No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 4 junction connector
  1. *: w/ Navigation System

If 2 or more ECUs and/or sensors do not appear on the Techstream "CAN Bus Check" screen, one side of the CAN branch wire may be open (one side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).

SymptomTrouble Area
2 or more ECUs and/or sensors do not appear on the Techstream "CAN Bus Check" screen.Certification ECU Four wheel drive control ECU Power management control ECU Display and navigation module display* Center airbag sensor assembly Spiral with sensor cable sub-assembly Yaw rate sensor assembly Main body ECU (multiplex network body ECU) Master cylinder solenoid (skid control ECU)
  1. *: w/ Navigation System

See also:
REMOVAL