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Home >> Toyota >> 2025 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Suspension >> Suspension Control Systems >> Adaptive Variable Suspension System - Diagnostic Codes >> Adaptive Variable Suspension System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message; DTC U1171-87: Lost Communication with Brake System Control Module (ch3) Missing Message [12/2024 - ] >> Description
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DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message; DTC U1171-87: Lost Communication with Brake System Control Module (ch3) Missing Message [12/2024 - ]: Description

The following DTCs are output when there is a communication malfunction between a sensor or ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority Note
U0100-87 Lost Communication with ECM/PCM "A" Missing Message While the vehicle speed is 30 km/h (19 mph) or higher, CAN communication from the ECM stops for 6 seconds or more
  • CAN communication system
  • ECM
  • Absorber control ECU
 Adaptive Variable Suspension System B For Gasoline Model
U0101-87 Lost Communication with TCM Missing Message Except Gasoline Model: 
  1. While the vehicle speed is 30 km/h (19 mph) or higher, CAN communication from the TCM stops for 6 seconds or more

For Gasoline Model: 
  1. While the vehicle speed is 30 km/h (19 mph) or higher, CAN communication from the ECM stops for 6 seconds or more
  • CAN communication system
  • TCM (except Gasoline Model)
  • ECM (for Gasoline Model)
  • Absorber control ECU
 Adaptive Variable Suspension System B -
U0125-87 Lost Communication with Multi-axis Acceleration Sensor Module "A" Missing Message While the vehicle speed is 7 km/h (5 mph) or higher, CAN communication from the yaw rate and acceleration sensor (airbag sensor with ECU assembly) stops or 3 seconds or more
  • Yaw rate and acceleration sensor (airbag sensor with ECU assembly)
  • CAN communication system
  • Absorber control ECU
 Adaptive Variable Suspension System B -
U0126-87 Lost Communication with Steering Angle Sensor Module Missing Message CAN communication from the steering sensor stops for 3 seconds or more
  • CAN communication line
  • Steering sensor
  • Absorber control ECU
 Adaptive Variable Suspension System B -
U0129-87 Lost Communication with Brake System Control Module "A" Missing Message Except Gasoline Model: 
  1. CAN communication from the No. 2 skid control ECU (brake actuator assembly) stops for 3 seconds or more

For Gasoline Model: 
  1. CAN communication from the skid control ECU (brake actuator assembly) stops for 3 seconds or more
  • CAN communication line
  • No. 2 skid control ECU (brake actuator assembly) (except Gasoline Model)
  • Skid control ECU (brake actuator assembly) (for Gasoline Model)
  • Absorber control ECU
 Adaptive Variable Suspension System B -
U0293-87 Lost Communication with Hybrid/EV Powertrain Control Module Missing Message While the vehicle speed is 30 km/h (19 mph) or higher, CAN communication from the hybrid vehicle control ECU assembly stops for 3 seconds or more
  • CAN communication line
  • Hybrid vehicle control ECU assembly
  • Absorber control ECU
 Adaptive Variable Suspension System B Except Gasoline Model
U1103-87 Lost Communication with Stop and Start Control Module Missing Message CAN communication from the engine stop and start ECU stops for 3 seconds or more
  • CAN communication line
  • Engine stop and start ECU
  • Absorber control ECU
 Adaptive Variable Suspension System B w/ Stop and Start System
U1171-87 Lost Communication with Brake System Control Module (ch3) Missing Message Except Gasoline Model: 
  1. CAN communication from the No. 2 skid control ECU (brake actuator assembly) stops for 3 seconds or more

For Gasoline Model: 
  1. CAN communication from the skid control ECU (brake actuator assembly) stops for 3 seconds or more
  • CAN communication line
  • No. 2 skid control ECU (brake actuator assembly) (except Gasoline Model)
  • Skid control ECU (brake actuator assembly) (for Gasoline Model)
  • Absorber control ECU
 Adaptive Variable Suspension System B -
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