| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000002B5UX |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [03/2023 - ] |
| Title: K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: Drive Mode Select Switch Circuit; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ] | ||
|
Drive Mode Select Switch Circuit |
SYSTEM DESCRIPTION
The ECM changes between Normal, Sport and Eco drive mode in accordance with the output of the drive mode select switch (combination switch assembly).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: PRECAUTION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
READ VALUE USING GTS (DRIVE MODE SELECT SWITCH (DMS+) AND DRIVE MODE SELECT SWITCH (DMS-)) |
(a) According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Drive Mode Select Switch (DMS+) |
Drive mode select switch (combination switch assembly) status |
ON or OFF |
|
- |
|
Drive Mode Select Switch (DMS-) |
Drive mode select switch (combination switch assembly) status |
ON or OFF |
|
- |
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Drive Mode Select Switch (DMS+) |
|
Drive Mode Select Switch (DMS-) |
|
Result |
Proceed to |
|---|---|
|
Data List value is normal |
A |
|
Data List value is not normal |
B |
| B |
|
|
|
2. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
3. |
INSPECT COMBINATION SWITCH ASSEMBLY (DRIVE MODE SELECT SWITCH) |
|
(a) Remove the combination switch assembly. Click here
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
7 (SEL) - 5 (E) |
Drive mode select switch pushed forward |
Below 50 Ω |
|
7 (SEL) - 5 (E) |
Drive mode select switch in neutral position |
10 kΩ or higher |
|
6 (E) - 5 (E) |
Drive mode select switch pulled rearward |
Below 50 Ω |
|
6 (E) - 5 (E) |
Drive mode select switch in neutral position |
10 kΩ or higher |
(c) Install the combination switch assembly.
Click here
| NG |
|
REPLACE COMBINATION SWITCH ASSEMBLY (DRIVE MODE SELECT SWITCH) |
|
|
4. |
CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND) |
(a) Disconnect the I61 combination switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I61-5 (E) - Body ground |
Always |
Below 1 Ω |
(c) Connect the I61 combination switch assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND) |
|
|
5. |
CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - ECM) |
(a) Disconnect the A178 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A178-58 (YZK) - Body ground |
Drive mode select switch pushed forward |
Below 50 Ω |
|
A178-58 (YZK) - Body ground |
Drive mode select switch in neutral position |
10 kΩ or higher |
|
A178-56 (DMS-) - Body ground |
Drive mode select switch pulled rearward |
Below 50 Ω |
|
A178-56 (DMS-) - Body ground |
Drive mode select switch in neutral position |
10 kΩ or higher |
(c) Connect the A178 ECM connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION SWITCH ASSEMBLY - ECM) |
|
|
6. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
|