DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" (Hybrid/EV Battery Local Bus) Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control 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 Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1154-87: Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message; DTC U117B-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (ch2) Missing Message [08/2023 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.

The hybrid vehicle control ECU transmits and receives signals via CAN communication to and from the ECM, MG ECU, skid control ECU, certification ECU, battery ECU, shift control ECU, power distribution box assembly, airbag ECU assembly, and air conditioning amplifier assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	DTC Output from	Priority	Note
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	A CAN communication error between the ECM and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U0100
U0103-87	Lost Communication with Gear Shift Control Module "A" (Hybrid/EV Battery Local Bus) Missing Message	A CAN communication error between the shift control ECU and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Does not come on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U0103
U0110-87	Lost Communication with Drive Motor Control Module "A" Missing Message	A CAN communication error between the MG ECU and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U0110
U0126-87	Lost Communication with Steering Angle Sensor Module Missing Message	A CAN communication error between the steering sensor and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Does not come on	Master Warning: Does not come on	Hybrid Control	B	SAE Code: U0126
U0129-87	Lost Communication with Brake System Control Module Missing Message	A CAN communication error (V BUS) between the brake actuator assembly (No. 2 skid control ECU) and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on / Does not come on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U0129
U0140-87	Lost Communication with Body Control Module Missing Message	A CAN communication error between the power distribution box assembly and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Does not come on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U0140
U0151-87	Lost Communication with Restraints Control Module Missing Message	A CAN communication error between the airbag ECU assembly and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Does not come on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U0151
U0164-87	Lost Communication with HVAC Control Module Missing Message	A CAN communication error between the air conditioning amplifier assembly and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U0164
U1107-87	Lost Communication with Power Management Module Missing Message	A CAN communication error between the certification ECU (smart key ECU assembly) (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Does not come on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U1107
U111A-87	Lost Communication with ECM/PCM "A" (ch2) Missing Message	A CAN communication error between the ECM and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U111A
U1154-87	Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message	A CAN communication error between the MG ECU and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U1154
U1170-87	Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message	A CAN communication error between the brake actuator assembly (No. 2 skid control ECU) and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U1170
U117B-87	Lost Communication with Hybrid/EV Battery Energy Control Module "A" (ch2) Missing Message	A CAN communication error between the battery ECU assembly and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic)	CAN communication system	Comes on	Master Warning: Comes on	Hybrid Control	B	SAE Code: U117B