Toyota Venza Quiz
Meter / Gauge / Display

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

In this manual: Meter / Gauge / Display
Introduction — 15Maintenance — 8Audio / Video — 102Garage Door Opener — 8Navigation / Multi Info Display — 81Park Assist / Monitoring — 50Brake (front) — 7Brake (rear) — 7Brake Control / Dynamic Control Systems — 79Brake System (other) — 28Parking Brake — 22Axle And Differential — 44Drive Shaft / Propeller Shaft — 24Mf1a Transfer / 4wd / Awd — 46U660e Automatic Transmission / Transaxle — 1241ar-fe Cooling — 311ar-fe Emission Control — 101ar-fe Engine Control — 1331ar-fe Engine Mechanical — 441ar-fe Fuel — 311ar-fe Intake / Exhaust — 211ar-fe Lubrication — 111ar-fe Starting — 16Cruise Control — 241ar-fe Battery / Charging — 162gr-fe Battery / Charging — 17Networking — 67Power Distribution — 8Power Assist Systems — 34Steering Column — 37Steering Gear / Linkage — 29Alignment / Handling Diagnosis — 4Front Suspension — 39Rear Suspension — 35Tire / Wheel — 4Tire Pressure Monitoring — 35Door / Hatch — 83Exterior Panels / Trim — 56Horn — 4Lighting (ext) — 89Mirror (ext) — 36Sliding Roof / Convertible — 26Window / Glass — 87Wiper / Washer — 30Door Lock — 85Heating / Air Conditioning — 82Interior Panels / Trim — 20Lighting (int) — 37Meter / Gauge / Display — 41Mirror (int) — 9Power Outlets (int) — 10Seat — 84Seat Belt — 43Supplemental Restraint Systems — 131Theft Deterrent / Keyless Entry — 155
4steps
~24min
2/5difficulty
Done 0 of 4
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:

  1. Vehicle speed is 5 km/h or more and IG voltage is 9.5 V or more
  2. 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:

  1. 15 seconds have elapsed since engine started and IG voltage is 9.5 V or more
  2. 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.

(c) Turn the Techstream 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 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.


A

GO TO CAN COMMUNICATION SYSTEM

B

USE SIMULATION METHOD TO CHECK

Test yourself

A quick Toyota Venza quiz: every answer comes with an explanation and a link to the manual page.