Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000257AP
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): Steering Pad Switch Circuit; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]

Steering Pad Switch Circuit

DESCRIPTION

The combination meter assembly and steering pad switch assembly are connected via direct line. The multi-information display in the combination meter assembly is operated using the switches of the steering pad switch assembly.

WIRING DIAGRAM

for TMC Made
for TMMMS Made

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
  • for TMC Made

    When replacing the combination meter assembly, update the ECU security key.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: UPDATE ECU SECURITY KEY

PROCEDURE

1.

PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Combination Meter > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Multi Switch (Up)

Performs the same operation as pressing the up switch on steering pad switch

OFF or ON

-

Multi Switch (Down)

Performs the same operation as pressing the down switch on steering pad switch

OFF or ON

-

Multi Switch (Left)

Performs the same operation as pressing the left switch on steering pad switch

OFF or ON

-

Multi Switch (Right)

Performs the same operation as pressing the right switch on steering pad switch

OFF or ON

-

Multi Switch (Enter)

Performs the same operation as pressing the OK switch on steering pad switch

OFF or ON

-

Multi Switch (Back)

Performs the same operation as pressing the back switch on steering pad switch

OFF or ON

-

Body Electrical > Combination Meter > Active Test

Tester Display

Multi Switch (Up)

Body Electrical > Combination Meter > Active Test

Tester Display

Multi Switch (Down)

Body Electrical > Combination Meter > Active Test

Tester Display

Multi Switch (Left)

Body Electrical > Combination Meter > Active Test

Tester Display

Multi Switch (Right)

Body Electrical > Combination Meter > Active Test

Tester Display

Multi Switch (Enter)

Body Electrical > Combination Meter > Active Test

Tester Display

Multi Switch (Back)

Result

Proceed to

Active Test can be performed correctly

A

Active Test cannot be performed correctly

B
B

REPLACE COMBINATION METER ASSEMBLY

A

2.

READ VALUE USING GTS

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

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Multi Switch (Up)

Up switch on steering pad switch operation

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Multi Switch (Down)

Down switch on steering pad switch operation

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Multi Switch (Left)

Left switch on steering pad switch operation

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Multi Switch (Right)

Right switch on steering pad switch operation

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Multi Switch (Enter)

OK switch on steering pad switch operation

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Multi Switch (Back)

Back switch on steering pad switch operation

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Body Electrical > Combination Meter > Data List

Tester Display

Multi Switch (Up)

Multi Switch (Down)

Multi Switch (Left)

Multi Switch (Right)

Multi Switch (Enter)

Multi Switch (Back)

Result

Proceed to

The value of the Data List item is correct, and the combination meter assembly operates correctly

A

The value of the Data List item is correct, but the combination meter assembly does not operate correctly

B

The Data List item changes correctly

C
A

USE SIMULATION METHOD TO CHECK

B

REPLACE COMBINATION METER ASSEMBLY

C

3.

INSPECT STEERING PAD SWITCH ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV [09/2022 -        ]; STEERING COLUMN: STEERING PAD SWITCH (except G16E-GTS): INSPECTION

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

4.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: INSPECTION

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK

5.

CHECK COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE)

*a

Front view of wire harness connector

(to Spiral Cable Sub-assembly)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I82-10 (+DP2) - Body ground

Ignition switch ON

4.8 to 5.2 V

I82-11 (+DP) - Body ground

Ignition switch ON

4.8 to 5.2 V
NG

GO TO STEP 9

OK

6.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

except Knobless Radio and Display Receiver

A

for Knobless Radio and Display Receiver

B
B

GO TO STEP 8

A

7.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY AND BODY GROUND)

(a) Disconnect the I55 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I55-20 (SWG) - I82-4 (EAU)

Always

Below 1 Ω

I55-1 (GND1) - Body ground

Always

Below 1 Ω
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY AND BODY GROUND)

(a) Disconnect the I184 and I185 radio and display receiver assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I185-23 (SWG) - I82-4 (EAU)

Always

Below 1 Ω

I184-7 (GND1) - Body ground

Always

Below 1 Ω
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - COMBINATION METER ASSEMBLY)

(a) Disconnect the I5 combination meter assembly*1 connector.

(b) Disconnect the I4 combination meter assembly*2 connector.

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

Standard Resistance (for TMC Made):

Tester Connection

Condition

Specified Condition

I82-10 (+DP2) - I5-12 (MSTI)

Always

Below 1 Ω

I82-11 (+DP) - I5-29 (MSM+)

Always

Below 1 Ω

I82-10 (+DP2) or I5-12 (MSTI) - Body ground

Always

10 kΩ or higher

I82-11 (+DP) or I5-29 (MSM+) - Body ground

Always

10 kΩ or higher

Standard Resistance (for TMMMS Made):

Tester Connection

Condition

Specified Condition

I82-11 (+DP) - I4-32 (MSM+)

Always

Below 1 Ω

I82-10 (+DP2) - I4-15 (MSTI)

Always

Below 1 Ω

I82-11 (+DP) or I4-32 (MSM+) - Body ground

Always

10 kΩ or higher

I82-10 (+DP2) or I4-15 (MSTI) - Body ground

Always

10 kΩ or higher
  • *1: for TMC Made
  • *2: for TMMMS Made
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR