Toyota Yaris: Dynamic Radar Cruise Control System / Distance Control Switch Circuit

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Distance Control Switch Circuit

DESCRIPTION

The vehicle-to-vehicle distance control switch is used to set the distance for vehicle-to-vehicle distance control mode. The vehicle-to-vehicle distance control switch is installed in the steering pad switch assembly. The vehicle-to-vehicle distance set value can be changed by operating the vehicle-to-vehicle distance control switch while the dynamic radar cruise control system is controlling vehicle speed in vehicle-to-vehicle distance control mode.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the ECM, refer to Service Bulletin.
  • The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

    Click here

  • 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

PROCEDURE

1.

READ VALUE USING GTS (VEHICLE-TO-VEHICLE DISTANCE CONTROL SWITCH)

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

Powertrain > Radar Cruise2 > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Vehicle-to-vehicle Distance Control Switch

Vehicle-to-vehicle distance control switch signal

ON or OFF

ON: Vehicle-to-vehicle distance control switch pushed

OFF: Vehicle-to-vehicle distance control switch not pushed

-

Powertrain > Radar Cruise2 > Data List

Tester Display

Vehicle-to-vehicle Distance Control Switch

OK:

The value of the Data List item changes according to the operation of the vehicle-to-vehicle distance control switch.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT STEERING PAD SWITCH ASSEMBLY

Click here

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

3.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Click here

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA, ECM AND BODY GROUND)

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

(b) Disconnect the V10 forward recognition camera connector.

(c) Disconnect the A106 ECM connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

H60-6 (DIST) - V10-3 (LKSW)

Always

Below 1 Ω

H60-2 (ECC) - A106-28 (ECCS)

Always

Below 1 Ω

H60-6 (DIST) or V10-3 (LKSW) - Body ground

Always

10 kΩ or higher

H60-2 (ECC) or A106-28 (ECCS) - Body ground

Always

10 kΩ or higher

(e) Connect the A106 ECM connector.

(f) Connect the V10 forward recognition camera connector.

(g) Connect the H60 spiral cable sub-assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

(a) Disconnect the A106 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A106-10 (E1) - Body ground

Always

Below 1 Ω

(c) Connect the A106 ECM connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK ECM (ECM TERMINALS)

(a) Disconnect the A106 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A106-28 (ECCS) - A106-10 (E1)

Always

Below 1 Ω

(c) Connect the A106 ECM connector.

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

REPLACE ECM

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