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

Fuel Sender Open Detected (B1500)

DESCRIPTION This DTC is output when the combination meter assembly detects a fuel sender gauge malfunction via the direct line. DTC No. DTC Detection Condition Tro ...

Entire Combination Meter does not Operate

DESCRIPTION This circuit is the power source circuit for the meter. This circuit provides two types of power sources; one is a constant power source mainly used as a backup power source, and the ...

Other materials about Toyota Venza:

Navigation Voice Circuit
DESCRIPTION This circuit is used when the voice switch of the steering pad switch assembly is pushed. Using this circuit, the navigation receiver assembly sends signals to the stereo component amplifier assembly. WIRING DIAGRAM PROCEDURE ...

Accessory Meter
Components COMPONENTS ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL ACCESSORY METER ASSEMBLY (w/o Rear View Monitor System) (a) Connect the connector. (b) Engage the 2 clamps ...

Removal
REMOVAL PROCEDURE 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. NOTICE: When disconnecting the cable, some systems ne ...