| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000002BCJ1 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [03/2023 - ] |
| Title: ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT CAMERA SYSTEM: Steering Pad Switch Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 - ] | ||
|
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 HV Model
WIRING DIAGRAM
for M20A-FKS with K120
for M20A-FKS with K121
for G16E-GTS
for HV 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
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: PRECAUTION](/t3Portal/stylegraphics/info.gif)
- 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 HV 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 |
|
| C |
|
REPLACE STEERING PAD SWITCH ASSEMBLY for G16E-GTS: Click here
except G16E-GTS: Click here
|
| D |
|
|
|
2. |
INSPECT STEERING PAD SWITCH ASSEMBLY |
for G16E-GTS: Click here
except G16E-GTS: Click here
| NG |
|
REPLACE STEERING PAD SWITCH ASSEMBLY for G16E-GTS: Click here
except G16E-GTS: Click here
|
|
|
3. |
INSPECT SPIRAL CABLE SUB-ASSEMBLY |
Click here
|
Result |
Proceed to |
|---|---|
|
OK (for Gasoline Model) |
A |
|
OK (for HV Model) |
B |
|
NG |
C |
| B |
|
| C |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM) |
(a) Disconnect the A47*1, A178*2 or A139*3 ECM connector.
- *1: for M20A-FKS with K120
- *2: for M20A-FKS with K121
- *3: for G16E-GTS
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for M20A-FKS with K120
|
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 |
for M20A-FKS with K121
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I82-2 (ECC) - A178-92 (ECCS) |
Always |
Below 1 Ω |
|
I82-2 (ECC) or A178-92 (ECCS) - Body ground |
Always |
10 kΩ or higher |
for G16E-GTS
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I82-2 (ECC) - A139-28 (ECCS) |
Always |
Below 1 Ω |
|
I82-2 (ECC) or A139-28 (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 I3 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) - I3-43 (CCSG) |
Always |
Below 1 Ω |
|
I82-2 (ECC) or I3-43 (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 |
for G16E-GTS: Click here
except G16E-GTS: Click here
| NG |
|
REPLACE STEERING PAD SWITCH ASSEMBLY for G16E-GTS: Click here
except G16E-GTS: Click here
|
|
|
7. |
INSPECT SPIRAL CABLE SUB-ASSEMBLY |
Click here
|
Result |
Proceed to |
|---|---|
|
OK (for Gasoline Model) |
A |
|
OK (for HV Model) |
B |
|
NG |
C |
| B |
|
| C |
|
|
|
8. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM) |
(a) Disconnect the A47*1, A178*2 or A139*3 ECM connector.
- *1: for M20A-FKS with K120
- *2: for M20A-FKS with K121
- *3: for G16E-GTS
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for M20A-FKS with K120
|
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 |
for M20A-FKS with K121
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I82-2 (ECC) - A178-91 (CCS) |
Always |
Below 1 Ω |
|
I82-2 (ECC) or A178-91 (CCS) - Body ground |
Always |
10 kΩ or higher |
for G16E-GTS
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I82-13 (CCS) - A139-27 (CCS) |
Always |
Below 1 Ω |
|
I82-13 (CCS) or A139-27 (CCS) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM for M20A-FKS: Click here
for G16E-GTS: Click here
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - HYBRID VEHICLE CONTROL ECU) |
(a) Disconnect the I3 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) - I3-29 (CCS) |
Always |
Below 1 Ω |
|
I82-13 (CCS) or I3-29 (CCS) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
10. |
INSPECT STEERING PAD SWITCH ASSEMBLY |
for G16E-GTS: Click here
except G16E-GTS: Click here
| NG |
|
REPLACE STEERING PAD SWITCH ASSEMBLY for G16E-GTS: Click here
except G16E-GTS: Click here
|
|
|
11. |
INSPECT SPIRAL CABLE SUB-ASSEMBLY |
Click here
| NG |
|
|
|
12. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the T21 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) - T21-5 (LKSW) |
Always |
Below 1 Ω |
|
I82-6 (DIST) or T21-5 (LKSW) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|