Toyota Venza: Diagnosis System

Toyota Venza Service Manual / Steering Column / Steering Lock System / Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) Diagnostic System

When troubleshooting a vehicle with a diagnostic system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the vehicle steering lock ECU (steering lock actuator assembly).

The steering lock ECU (steering lock actuator assembly) records DTCs when the computer detects a malfunction in the computer itself or in its circuits.

To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables the DTCs to be cleared, the indicators to be activated, and the Data List to be checked.

(b) The diagnosis information of the steering lock ECU (steering lock actuator assembly) is transmitted to the Techstream via the certification ECU (smart key ECU assembly) as the steering lock ECU (steering lock actuator assembly) is not connected to CAN.

(1) Check the DLC3 (See page ).

2. WARNING FUNCTION OF ENGINE SWITCH INDICATOR

(a) The steering lock ECU (steering lock actuator assembly) blinks the LED indicator of the engine switch when any of the following problems occurs in the system:

Text in Illustration

*1	Indicator Light

Detection Item	Indicator Light Blink Pattern	Indication Status	Countermeasure
Steering lock is still not released	Blinks green at 1-second intervals Goes off 30 seconds after blinking starts	The motor operates to release the steering lock, but the steering lock cannot be released (e.g. the lock bar is stuck in the steering column).	Push the engine switch while turning the steering wheel left or right.
Malfunction in push-button start system	Blinks amber at 2-second intervals Goes off 15 seconds after the engine switch is turned off while blinking	There is a short in the devices activating the motor. There is a problem in the steering lock ECU (steering lock actuator assembly) or power management control ECU.	Troubleshoot by following "How to Proceed with Troubleshooting" (See page ).

Terminals Of Ecu

TERMINALS OF ECU 1. STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Terminal No. (Symbol) Wiring Color Terminal Description Condition Spe ...

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DTC CHECK / CLEAR 1. CHECK DTCS (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techstream on. (e) Check for DTCs. Enter ...

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