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

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / Lost Communication with ECM / PCM "A" (U0100,U0129)

DESCRIPTION

The power steering ECU receives signals from the ECM and the brake actuator assembly (skid control ECU) via the CAN communication system.

DTC No.	DTC Detection Condition	Trouble Area
U0100	Lost communication with ECM/PCM "A"	CAN communication system ECM
U0129	Lost communication with brake system control module	CAN communication system Brake actuator assembly (Skid control ECU)

PROCEDURE

1.	CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

DTC is not output.

CHECK INTERMITTENT PROBLEMS

GO TO CAN COMMUNICATION SYSTEM

On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. CHECK STEERING EFFORT (TORQUE) NOTICE: Some of these service operations may affect the SRS airbags. Read the precautionary notices concerning the SRS airbag sy ...

Assist Map Number Mismatch (C1582)

DESCRIPTION When an incorrect ECM or brake actuator assembly (skid control ECU) is installed after the assist map has been recorded in the power steering ECU, then DTC C1582 is stored because the ...

Other materials about Toyota Venza:

Radio Antenna
Components COMPONENTS ILLUSTRATION ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL RADIO ANTENNA ASSEMBLY (a) Engage the 2 claws to install the radio antenna assembly. (b) Place the antenna cord in the cutout of the ante ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful bec ...

Diagnosis System
DIAGNOSIS SYSTEM 1. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM (a) CAN No. 1 Bus (1) ECM (2) Main body ECU (Driver side junction block) (3) Combination meter (4) Power steering ECU (5) Air conditioning amplifier*3 (6) Center air ...