Toyota Venza: Lost Communication with ECM / PCM "A" (U0100,U0129)

Toyota Venza Service Manual / Meter / Gauge / Display / Meter / Gauge System / Lost Communication with ECM / PCM "A" (U0100,U0129)

DESCRIPTION

The combination meter assembly communicates with the ECM via the CAN communication system (CAN No. 1 Bus).

DTC No.	DTC Detection Condition	Trouble Area
U0100	When either of the following conditions is detected: Vehicle speed is 5 km/h (3.1 mph) or more and IG voltage is 9.5 V or more No communication with ECM continues for 3 seconds or more (No communication with ECM continues for 60 seconds or more)	ECM CAN communication system Combination meter assembly
U0129	When either of the following conditions is detected: 15 seconds have elapsed since engine started and IG voltage is 9.5 V or more No communication with skid control ECU continues for 3 seconds or more (No communication with skid control ECU continues for 60 seconds or more)	Skid control ECU CAN communication system Combination meter assembly

PROCEDURE

1.	CONFIRM DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Trouble Codes.

(e) Clear the stored DTCs.

(f) Drive the vehicle at more than 5 km/h (3.1 mph) for at least 60 seconds.

(g) Stop the vehicle.

(h) Check for DTCs (See page ).

Result	Proceed to
DTC is output.	A
DTC is not output.	B

HINT:

If CAN communication system DTC U0100 or U0129 and another DTC are output at the same time, perform troubleshooting for CAN communication system DTC U0100 or U0129 first.

GO TO CAN COMMUNICATION SYSTEM

USE SIMULATION METHOD TO CHECK

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