METER / GAUGE SYSTEM, Diagnostic DTC:U0100, U0129, U0131, U0142, U0151, U0163, U0182, U023A, U1104

DTC Code	DTC Name
U0100	Lost Communication with ECM / PCM "A"
U0129	Lost Communication with Brake System Control Module
U0131	Lost Communication with Power Steering Control Module
U0142	Lost Communication with Body Control Module "B"
U0151	Lost Communication with Restraints Control Module
U0163	Lost Communication with Navigation Control Module
U0182	Lost Communication with Lighting Control Module Front
U023A	Lost Communication with Front Camera Module
U1104	Lost Communication with Driving Support ECU

DESCRIPTION

The combination meter assembly communicates with the ECM, brake actuator assembly (skid control ECU), power steering ECU assembly, main body ECU (multiplex network body ECU), airbag sensor assembly, radio and display receiver assembly*1, headlight control ECU sub-assembly LH*2, forward recognition camera*3 and millimeter wave radar sensor assembly*3 via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	Note
U0100	Lost Communication with ECM / PCM "A"	When IG voltage is 9.5 V or more and the following condition is detected: No communication with ECM continues for 2 seconds or more	ECM CAN communication system Combination meter assembly	DTC stored	-
U0129	Lost Communication with Brake System Control Module	When IG voltage is 9.5 V or more and the following condition is detected: No communication with brake actuator assembly (skid control ECU) continues for 3 seconds or more	Brake actuator assembly (skid control ECU) CAN communication system Combination meter assembly	DTC stored	-
U0131	Lost Communication with Power Steering Control Module	When IG voltage is 9.5 V or more and the following condition is detected: No communication with power steering ECU assembly continues for 3 seconds or more	Power steering ECU assembly CAN communication system Combination meter assembly	DTC stored	-
U0142	Lost Communication with Body Control Module "B"	When IG voltage is 9.5 V or more and the following condition is detected: No communication with main body ECU (multiplex network body ECU) continues for 3 seconds or more	Main body ECU (multiplex network body ECU) CAN communication system Combination meter assembly	DTC stored	-
U0151	Lost Communication with Restraints Control Module	When IG voltage is 9.5 V or more and the following condition is detected: No communication with airbag sensor assembly continues for 10 seconds or more	Airbag sensor assembly CAN communication system Combination meter assembly	DTC stored	-
U0163	Lost Communication with Navigation Control Module	When IG voltage is 9.5 V or more and the following condition is detected: No communication with radio and display receiver assembly continues for 3 seconds or more	Radio and display receiver assembly CAN communication system Combination meter assembly	DTC stored	*1
U0182	Lost Communication with Lighting Control Module Front	When IG voltage is 9.5 V or more and the following condition is detected: No communication with headlight control ECU sub-assembly LH continues for 10 seconds or more	Headlight control ECU sub-assembly LH CAN communication system Combination meter assembly	DTC stored	*2
U023A	Lost Communication with Front Camera Module	When IG voltage is 9.5 V or more and either of the following conditions is met: No communication with lane departure warning camera continues for 10 seconds or more No communication with millimeter wave radar sensor assembly continues for 10 seconds or more	Forward recognition camera Millimeter wave radar sensor assembly CAN communication system Combination meter assembly	DTC stored	3, 4
U1104	Lost Communication with Driving Support ECU	When IG voltage is 9.5 V or more and the following condition is detected: No communication with millimeter wave radar sensor assembly continues for 10 seconds or more	Millimeter wave radar sensor assembly CAN communication system Combination meter assembly	DTC stored	*1

*1: for Radio and Display Receiver Type
*2: for LED Headlight
*3: w/ Toyota Safety Sense
*4: When U0234 and U1104 are output simultaneously, there may be a malfunction in the millimeter wave radrar sensor assembly.

PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

Check if CAN communication DTCs are output.

Click here

Result

Result	Proceed to
CAN communication DTCs are output.	A
CAN communication DTCs are not output.	B

GO TO CAN COMMUNICATION SYSTEM Click here

USE SIMULATION METHOD TO CHECK Click here