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CAN Communication System (Diagnostic Codes & Circuit Tests): Overview Toyota 4Runner V

Communication Devices 24 illustrations ~766 words

DESCRIPTION

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

HINT

For vehicles with a smart key system only.

Scheme 106

Scheme 106: WIRING DIAGRAM
Scheme 106: 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 branch wire or connector Air conditioning amplifier assembly

HINT

For vehicles with a smart key system only.

Scheme 107

Scheme 107: WIRING DIAGRAM
Scheme 107: WIRING DIAGRAM
  1. The power management control ECU stores this DTC when no signals can be received from the ECUs that are 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 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 are 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 Air conditioning amplifier assembly branch wire or connector Power management control ECU main wire or connector ECM main wire or connector Air conditioning amplifier assembly Power management control ECU ECM No. 3 junction connector

HINT

For vehicles with a smart key system only.

Scheme 108

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Scheme 108: WIRING DIAGRAM
  1. The main body ECU (multiplex network body ECU) stores this DTC when no signals can be received from the ECUs that are memorized as those connected to the CAN MS bus.
  2. When the main body ECU (multiplex network body ECU) receives a response signal from the ECUs connected to the CAN MS bus, the main body ECU (multiplex network body ECU) recognizes and memorizes that the ECU is connected to the CAN MS bus. Based on this memorized data, the main body ECU (multiplex network body ECU) monitors for malfunctions in the ECUs connected to the CAN MS bus when communicating with those ECUs. If the main body ECU (multiplex network body ECU) cannot receive response signals from the ECUs that are memorized as those connected to the CAN 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).Power source or inside main body ECU (multiplex network body ECU) Power source or inside drive monitor switch CAN MS bus circuit Main body ECU (multiplex network body ECU) main wire or connector Drive monitor switch main wire or connector Main body ECU (multiplex network body ECU) Drive monitor switch
U1114Lost communication with the main switch module.Power source or inside main body ECU (multiplex network body ECU) Power source or inside drive monitor switch CAN MS bus circuit Main body ECU (multiplex network body ECU) main wire or connector Drive monitor switch main wire or connector Main body ECU (multiplex network body ECU) Drive monitor switch

HINT

For vehicles with CRAWL control only.

Scheme 109

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Scheme 109: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Brake Actuator (Skid Control ECU) Communication Stop ModeEither condition is met: "ABS/VSC/TRAC" is not displayed on the "CAN Bus Check" screen. "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) branch wire or connector Master cylinder solenoid (skid control ECU)

Scheme 110

Scheme 110: WIRING DIAGRAM
Scheme 110: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Air Conditioning Amplifier Communication Stop ModeEither condition is met: "Air Conditioner" is not displayed on the "CAN Bus Check" screen. "Air Conditioning Amplifier Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside air conditioning amplifier assembly Air conditioning amplifier assembly branch wire or connector Air conditioning amplifier assembly

HINT

For vehicles without a smart key system only.

Scheme 111

Scheme 111: WIRING DIAGRAM
Scheme 111: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Power Steering ECU Communication Stop ModeEither condition is met: "PPS" is not displayed on the "CAN Bus Check" screen. "Power Steering ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside power steering ECU assembly Power steering ECU assembly branch wire or connector Power steering ECU assembly

Scheme 112

Scheme 112: WIRING DIAGRAM
Scheme 112: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Steering Angle Sensor Communication Stop ModeEither condition is met: "Steering Angle Sensor" is not displayed on the "CAN Bus Check" screen. "Steering Angle Sensor Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside spiral cable sub-assembly (steering angle sensor) Spiral cable sub-assembly (steering angle sensor) branch wire or connector Spiral cable sub-assembly (steering angle sensor)

Scheme 113

Scheme 113: WIRING DIAGRAM
Scheme 113: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Yaw Rate Sensor Communication Stop ModeEither condition is met: "Yaw Rate / Deceleration Sensor" is not displayed on the "CAN Bus Check" screen. "Yaw Rate Sensor Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside yaw rate sensor assembly Yaw rate sensor assembly branch wire or connector Yaw rate sensor assembly

Scheme 114

Scheme 114: WIRING DIAGRAM
Scheme 114: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
ECM Communication Stop ModeEither condition is met: "Engine" is not displayed on the "CAN Bus Check" screen. "ECM Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside ECM ECM

Scheme 115

Scheme 115: WIRING DIAGRAM
Scheme 115: WIRING DIAGRAM

Scheme 116

Scheme 116
Scheme 116
Detection ItemSymptomTrouble Area
Main Body ECU Communication Stop ModeEither condition is met: "Main Body" is not displayed on the "CAN Bus Check" screen. "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) branch wire or connector Main body ECU (multiplex network body ECU)

Scheme 117

Scheme 117: WIRING DIAGRAM
Scheme 117: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Power Management Control ECU Communication Stop ModeEither condition is met: "Power Management1" is not displayed on the "CAN Bus Check" screen. "Power Management Control ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside power management control ECU Power management control ECU branch wire or connector Power management control ECU

HINT

For vehicles with a smart key system only.

Scheme 118

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Scheme 118: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Combination Meter ECU Communication Stop ModeEither condition is met: "Combination Meter" is not displayed on the "CAN Bus Check" screen. "Combination Meter ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside combination meter assembly Combination meter assembly

Scheme 119

Scheme 119: WIRING DIAGRAM
Scheme 119: WIRING DIAGRAM
Detection ItemSymptomsTrouble Area
Certification ECU Communication Stop ModeEither condition is met: "Smart Access/Smart Key/Wireless Tuner" is not displayed on the "CAN Bus Check" screen. "Certification ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside certification ECU Certification ECU branch wire or connector Certification ECU

HINT

For vehicles with a smart key system only.

Scheme 120

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Scheme 120: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Center Airbag Sensor Communication Stop ModeEither condition is met: "SRS Airbag" is not displayed on the "CAN Bus Check" screen. "Center Airbag Sensor Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside center airbag sensor assembly Center airbag sensor assembly branch wire or connector Center airbag sensor assembly

Scheme 121

Scheme 121: WIRING DIAGRAM
Scheme 121: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Suspension Control ECU Communication Stop ModeEither condition is met: "KDSS" is not displayed on the "CAN Bus Check" screen. "Suspension Control ECU Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside stabilizer control ECU Stabilizer control ECU branch wire or connector Stabilizer control ECU

HINT

For vehicles with a kinetic dynamic suspension system only.

Scheme 122

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Scheme 122: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
4WD Control ECU Communication Stop ModeEither condition is met: "Four Wheel Drive Control" is not displayed on the "Bus Check" screen. "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 branch line or connector Four wheel drive control ECU

HINT

For vehicles with four wheel drive only.

Scheme 123

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Scheme 123: WIRING DIAGRAM
Detection ItemSymptomTrouble Area
Navigation Receiver Communication Stop ModeEither condition is met: "AVN1" is not displayed on the "Bus Check" screen. "Navigation Receiver Communication Stop Mode" in "DTC Combination Table" applies.Power source or inside navigation receiver assembly Navigation receiver branch wire or connector Navigation Receiver Assembly

HINT

For vehicles with a navigation system only.

Scheme 124

Scheme 124: WIRING DIAGRAM
Scheme 124: 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 and 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
  1. *: w/ Navigation System

Scheme 125

Scheme 125: WIRING DIAGRAM
Scheme 125: 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 Master cylinder solenoid (skid control ECU) Combination meter assembly Stabilizer control ECU*1 Main body ECU (multiplex network body ECU) Center airbag sensor assembly Spiral cable sub-assembly (steering angle sensor) Navigation receiver assembly*2 Certification ECU*3 Power management control ECU*3 Air conditioning amplifier assembly*4 Four wheel drive control ECU*5 Yaw rate sensor assembly Power steering ECU assembly ECM No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 4 junction connector*2
  1. *1: w/ Kinetic Dynamic Suspension System
  2. *2: w/ Navigation System
  3. *3: w/ Smart Key System
  4. *4: w/o Smart Key System
  5. *5: for 4WD

Scheme 126

Scheme 126: WIRING DIAGRAM
Scheme 126: WIRING DIAGRAM

Scheme 127

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Scheme 127

Scheme 128

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Scheme 128

Scheme 129

Scheme 129
Scheme 129

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 line and +B Master cylinder solenoid (skid control ECU) Combination meter assembly Stabilizer control ECU*1 Main body ECU (multiplex network body ECU) Center airbag sensor assembly Spiral cable sub-assembly (steering angle sensor) Navigation receiver assembly*2 Certification ECU*3 Power management control ECU*3 Air conditioning amplifier assembly*4 Four wheel drive control ECU*5 Yaw rate sensor assembly Power steering ECU assembly ECM No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 4 junction connector*2
  1. *1: w/ Kinetic Dynamic Suspension System
  2. *2: w/ Navigation System
  3. *3: w/ Smart Key System
  4. *4: w/o Smart Key System
  5. *5: for 4WD

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 line and GND Master cylinder solenoid (skid control ECU) Combination meter assembly Stabilizer control ECU*1 Main body ECU (multiplex network body ECU) Center airbag sensor assembly Spiral cable sub-assembly (steering angle sensor) Navigation receiver assembly*2 Certification ECU*3 Power management control ECU*3 Air conditioning amplifier assembly*4 Four wheel drive control ECU*5 Yaw rate sensor assembly Power steering ECU assembly ECM No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 4 junction connector*2
  1. *1: w/ Kinetic Dynamic Suspension System
  2. *2: w/ Navigation System
  3. *3: w/ Smart Key System
  4. *4: w/o Smart Key System
  5. *5: for 4WD

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.Master cylinder solenoid (skid control ECU) Stabilizer control ECU*1 Main body ECU (multiplex network body ECU) Center airbag sensor assembly Spiral cable sub-assembly (steering angle sensor) Navigation receiver assembly*2 Certification ECU*3 Power management control ECU*3 Air conditioning amplifier assembly*4 Four wheel drive control ECU*5 Yaw rate sensor assembly Power steering ECU assembly
  1. *1: w/ Kinetic Dynamic Suspension System
  2. *2: w/ Navigation System
  3. *3: w/ Smart Key System
  4. *4: w/o Smart Key System
  5. *5: for 4WD

See also:
• REMOVAL