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

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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 ...

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