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Home >> Lexus >> 2025 >> RX 350h Premium >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seats >> Front Power Seat Control System (W/ Memory) - Diagnostic Codes & Symptom Tests (1 Of 2) >> FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0199-87: Lost Communication with "Door Control Module A" Missing Message; DTC U0200-87: Lost Communication with "Door Control Module B" Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1115-87: Lost Communication with Tilt & Telescopic Module Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [08/2023 - ] >> Description
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DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0199-87: Lost Communication with "Door Control Module A" Missing Message; DTC U0200-87: Lost Communication with "Door Control Module B" Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1115-87: Lost Communication with Tilt & Telescopic Module Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [08/2023 - ]: Description

These DTCs are stored if a CAN communication malfunction occurs between the position control ECU assembly and other ECUs.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
U0100-87 Lost Communication with ECM/PCM "A" Missing Message except Gasoline Model: 
  1. The position control ECU assembly LH/RH* does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.

for Gasoline Model: 
  1. The position control ECU assembly LH/RH* does not receive data from the ECM for approximately 10 seconds or more.
 CAN communication system Driver Seat
Passenger Seat		 B
U0129-87 Lost Communication with Brake System Control Module Missing Message except Gasoline Model: 
  1. The position control ECU assembly LH/RH* does not receive data from the No. 2 skid control ECU (brake actuator assembly) for approximately 10 seconds or more.

for Gasoline Model: 
  1. The position control ECU assembly LH/RH* does not receive data from the skid control ECU (brake actuator assembly) for approximately 10 seconds or more.
 CAN communication system Driver Seat
Passenger Seat		 B
U0140-87 Lost Communication with Body Control Module Missing Message The position control ECU assembly LH/RH* does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. CAN communication system Driver Seat
Passenger Seat		 B
U0163-87 Lost Communication with Navigation Control Module Missing Message The position control ECU assembly LH/RH* does not receive data from the radio and display receiver assembly for approximately 10 seconds or more. CAN communication system Driver Seat
Passenger Seat		 B
U0199-87 Lost Communication with "Door Control Module A" Missing Message The position control ECU assembly RH does not receive data from the outer mirror control ECU assembly LH for approximately 10 seconds or more. CAN communication system Passenger Seat B
U0200-87 Lost Communication with "Door Control Module B" Missing Message The position control ECU assembly RH does not receive data from the outer mirror control ECU assembly RH for approximately 10 seconds or more. CAN communication system Passenger Seat B
U1107-87 Lost Communication with Power Management Module Missing Message The position control ECU assembly LH/RH* does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more. CAN communication system Driver Seat
Passenger Seat		 B
U1115-87 Lost Communication with Tilt & Telescopic Module Missing Message The position control ECU assembly LH does not receive data from the multiplex tilt and telescopic ECU for approximately 10 seconds or more. CAN communication system Driver Seat B
U114F-87 Lost Communication with Power Integration Module Missing Message The position control ECU assembly LH/RH* does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. CAN communication system Driver Seat
Passenger Seat		 B
  1. *: w/ Front Passenger Seat Memory
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