Toyota Venza manuals

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:

  1. Vehicle speed is 5 km/h (3.1 mph) 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 (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.


A

GO TO CAN COMMUNICATION SYSTEM


B

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:

Installation
INSTALLATION PROCEDURE 1. INSTALL CHARCOAL CANISTER LEAK DETECTION PUMP SUB-ASSEMBLY (a) Engage the 2 claws to install a new charcoal canister leak detection pump sub-assembly to the charcoal canister assembly. NOTICE: Do n ...

Initialization
INITIALIZATION NOTICE: Make sure that the front passenger seat is not occupied before performing the operation. HINT: Perform zero point calibration and sensitivity check if any of the following conditions occur: The occupant classification ECU ...

Open in Front Passenger Side Electrical Antenna Circuit (B27A2)
DESCRIPTION The certification ECU (smart key ECU assembly) generates a request signal and sends it to the door electrical key oscillator built into the front door outside handle assembly (for front passenger side) at 0.25-second intervals. To detect a k ...

© 2016-2020 Copyright www.tovenza.com

0.2455