Toyota Yaris: Lane Tracing Assist System / Steering Pad Switch Circuit

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Lane Tracing Assist System / Steering Pad Switch Circuit

DESCRIPTION

The forward recognition camera receives LTA main switch signals from the steering pad switch assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to read Before Starting Adjustment, then perform optical axis alignment for the forward recognition camera and clear the vehicle control history for each system.
HINT:

Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.

One time recognition: Click here

Sequential recognition: Click here

Driving Adjustment: Click here
During the steering pad switch assembly check, check the precautions for the airbag system since the horn button assembly is removed during servicing. (installation/removal of parts, checks, replacement, etc.)
Click here

PROCEDURE

1.	READ VALUE USING GTS (LDA CONTROL)

(a) Read the Data List according to the display on the GTS.

Chassis > Lane Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
LDA Control	Whether lane tracing assist system control is permitted or not	Prohibit or Permit	Prohibit: Lane tracing assist system control not possible Permit: Lane tracing assist system control possible	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

LDA Control

Whether lane tracing assist system control is permitted or not

Prohibit or Permit

Prohibit: Lane tracing assist system control not possible

Permit: Lane tracing assist system control possible

Chassis > Lane Control > Data List

Tester Display
LDA Control

Result	Proceed to
Data List value changes when LTA Main Switch is operated	A
Data List value does not change when LTA Main Switch is operated	B

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT STEERING PAD SWITCH ASSEMBLY

Click here

REPLACE STEERING PAD SWITCH ASSEMBLY

3.	INSPECT SPIRAL CABLE SUB-ASSEMBLY

Click here

REPLACE SPIRAL CABLE SUB-ASSEMBLY

4.	CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA)

(a) Disconnect the H60 spiral cable sub-assembly connector.

(b) Disconnect the V10 forward recognition camera connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
H60-6 (DIST) - V10-3 (LKSW)	Always	Below 1 Ω
H60-6 (DIST) or V10-3 (LKSW) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)

(a) Disconnect the H60 spiral cable sub-assembly connector.

(b) Disconnect the A106 ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
H60-2 (ECC) - A106-28 (ECCS)	Always	Below 1 Ω
H60-2 (ECC) or A106-28 (ECCS) - Body ground	Always	10 kΩ or higher

REPLACE FORWARD RECOGNITION CAMERA

REPAIR OR REPLACE HARNESS OR CONNECTOR

Internal Control Module Software Incompatibility Not Programmed (U030051,U030057)

DESCRIPTION The forward recognition camera receives vehicle information from the ECM via the CAN communication line. If the forward recognition camera cannot confirm the vehicle information sent from the ECM, the forward recognition camera stores DTC U030051...

Indicator Circuit

DESCRIPTION The forward recognition camera sends indicator illumination request signals to the combination meter assembly via CAN communication. CAUTION / NOTICE / HINT NOTICE: When replacing the combination meter assembly, always replace it with a new one...

Other information:

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