Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Steering Pad Switch Circuit

DESCRIPTION

  • ECM*1 or hybrid vehicle control ECU*2 performs cruise control based on signals from the driving assist switch, +RES switch, -switch, CANCEL switch (steering pad switch assembly).
  • Forward recognition camera changes the driving support mode, turns LTA ON/OFF, and sets the vehicle-to-vehicle distance based on signals from the driving assist mode select switch, LTA switch, and vehicle-to-vehicle distance switch (steering pad switch assembly).
    • *1: for Gasoline Model
    • *2: for HEV Model

WIRING DIAGRAM

for Gasoline Model

for HEV Model

CAUTION / NOTICE / HINT

NOTICE:

  • 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 has been replaced with a new one, make sure to clear all stored vehicle control history of each system and the forward recognition camera beam axis alignment data.

    HINT:

    Forward recognition camera beam axis alignment can be performed by using "One Time Recognition", "Driving Adjustment" or "Camera Axis Adjustment Value Write".

    One Time Recognition: Click here

    Driving Adjustment: Click here

    Camera Axis Adjustment Value Write: Click here

  • If the forward recognition camera has been replaced with a new one, make sure to perform Software Version Confirmation.

    Click here

  • for Gasoline Model

    Before replacing the ECM, refer to Registration.

    Click here

  • for HEV Model

    Before replacing the hybrid vehicle control ECU, refer to Registration.

    Click here

PROCEDURE

1.

CONFIRM PROBLEM SYMPTOMS

(a) Check the problem symptoms.

Result

Proceed to

All switches cannot be operated

A

Driving assist switch, +RES switch, -Switch, CANCEL switch cannot be operated

B

Only driving assist switch cannot be operated

C

Only +RES switch cannot be operated

Only -switch cannot be operated

Only CANCEL switch cannot be operated

Only driving assist mode select switch cannot be operated

Only vehicle-to-vehicle distance switch cannot be operated

Only LTA switch cannot be operated

Driving assist mode select switch, vehicle-to-vehicle distance switch, and LTA switch cannot be operated

D

B

GO TO STEP 6

C

REPLACE STEERING PAD SWITCH ASSEMBLY

D

GO TO STEP 10

A

2.

INSPECT STEERING PAD SWITCH ASSEMBLY

Click here

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

3.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Click here

Result

Proceed to

OK (for Gasoline Model)

A

OK (for HEV Model)

B

NG

C

B

GO TO STEP 5

C

REPLACE SPIRAL CABLE SUB-ASSEMBLY

A

4.

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

(a) Disconnect the A47 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I82-2 (ECC) - A47-28 (ECCS)

Always

Below 1 Ω

I82-2 (ECC) or A47-28 (ECCS) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the I249 hybrid vehicle control ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I82-2 (ECC) - I249-43 (CCSG)

Always

Below 1 Ω

I82-2 (ECC) or I249-43 (CCSG) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

INSPECT STEERING PAD SWITCH ASSEMBLY

Click here

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

7.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Click here

Result

Proceed to

OK (for Gasoline Model)

A

OK (for HEV Model)

B

NG

C

B

GO TO STEP 9

C

REPLACE SPIRAL CABLE SUB-ASSEMBLY

A

8.

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

(a) Disconnect the A47 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I82-13 (CCS) - A47-27 (CCS)

Always

Below 1 Ω

I82-13 (CCS) or A47-27 (CCS) - Body ground

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the I249 hybrid vehicle control ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I82-13 (CCS) - I249-29 (CCS)

Always

Below 1 Ω

I82-13 (CCS) or I249-29 (CCS) - Body ground

Always

10 kΩ or higher

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.

INSPECT STEERING PAD SWITCH ASSEMBLY

Click here

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

11.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Click here

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK

12.

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

(a) Disconnect the T32 forward recognition camera connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I82-6 (DIST) - T32-5 (LKSW)

Always

Below 1 Ω

I82-6 (DIST) or T32-5 (LKSW) - Body ground

Always

10 kΩ or higher

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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