- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000002B365 |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [03/2023 - ] |
| Title: K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P17029F; AT Solenoids Operation Shutdown Circuit Stuck Off; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ] | ||
|
DTC |
P17029F |
AT Solenoids Operation Shutdown Circuit Stuck Off |
DESCRIPTION
The ECM detects a malfunction in the current cut circuit used to transition to a fail-safe gear position.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Priority |
Note |
|---|---|---|---|---|---|---|---|
|
P17029F |
AT Solenoids Operation Shutdown Circuit Stuck Off |
Any of the following conditions is detected for 0.1 seconds or more during a solenoid current cut request with the ignition switch off (1-trip detection logic):
|
|
Comes on |
Engine |
B |
SAE Code: P1702 |
MONITOR DESCRIPTION
When the ignition switch is off and current is detected as flowing to the solenoid valve during a solenoid current cut request, the ECM stores a DTC.
MONITOR STRATEGY
|
Related DTCs |
P1702: Solenoid electric current cutting circuit/Functional check |
|
Required sensors/Components |
Shift solenoid valve SL1 Shift solenoid valve SL2 Shift solenoid valve SLU Shift solenoid valve SLP Shift solenoid valve SLS Shift solenoid valve SC1 Shift solenoid valve SC2 Shift solenoid valve SC3 |
|
Frequency of operation |
Continuous |
|
Duration |
0.1 sec. |
|
MIL operation |
1 driving cycle |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
|
Solenoid current cut |
Request |
|
Ignition switch |
OFF |
|
Engine speed |
50 rpm or less |
|
Monitor shift position |
P |
TYPICAL MALFUNCTION THRESHOLDS
Any of the following conditions are met: Condition (A), (B) or (C)
Condition (A)
|
Current of SL1 |
ON |
Condition (B)
|
Current of SL2 |
ON |
Condition (C)
|
Current of SLU |
ON |
CONFIRMATION DRIVING PATTERN
HINT:
After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Turn the ignition switch off and wait for 2 minutes or more. [*1]
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Turn the ignition switch to ON.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P17029F.
-
Check the DTC judgment result.
GTS Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
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)
-
Check that no DTCs are stored after performing initialization.
Click here
HINT:
If any DTCs other than DTC P17029F are output, perform troubleshooting for those DTCs first.
PROCEDURE
|
1. |
CHECK DTC OUTPUT (IN ADDITION TO DTC P17029F) |
(a) Read the DTCs using the GTS.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Only P17029F is output |
A |
|
P17029F and other DTCs are output |
B |
| B |
|
GO TO DTC CHART |
|
|
2. |
INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL1, SL2, SLU, SLP, SLS, SC1, SC2 and SC3) |
Pre-procedure1
(a) Disconnect the C61 transmission wire connector.
Procedure1
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
Result:
|
|
Post-procedure1
(c) Connect the C61 transmission wire connector.
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
Pre-procedure1
(a) Disconnect the C160 ECM connector.
(b) Disconnect the C61 transmission wire connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C61-2 (SL1+) - C160-56 (SL1+) |
Always |
Below 1 Ω |
|
C61-7 (SL1-) - C160-57 (SL1-) |
Always |
Below 1 Ω |
|
C61-3 (SL2+) - C160-7 (SL2+) |
Always |
Below 1 Ω |
|
C61-8 (SL2-) - C160-6 (SL2-) |
Always |
Below 1 Ω |
|
C61-4 (SLU+) - C160-30 (SLU+) |
Always |
Below 1 Ω |
|
C61-9 (SLU-) - C160-31 (SLU-) |
Always |
Below 1 Ω |
|
C61-5 (SLP+) - C160-54 (SLP+) |
Always |
Below 1 Ω |
|
C61-10 (SLP-) - C160-55 (SLP-) |
Always |
Below 1 Ω |
|
C61-15 (SLS+) - C160-58 (SLS+) |
Always |
Below 1 Ω |
|
C61-20 (SLS-) - C160-59 (SLS-) |
Always |
Below 1 Ω |
|
C61-14 (SC1) - C160-3 (SC1) |
Always |
Below 1 Ω |
|
C61-13 (SC2) - C160-2 (SC2) |
Always |
Below 1 Ω |
|
C61-18 (SC3) - C160-1 (SC3) |
Always |
Below 1 Ω |
|
C61-2 (SL1+) or C160-56 (SL1+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-7 (SL1-) or C160-57 (SL1-)- Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-3 (SL2+) or C160-7 (SL2+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-8 (SL2-) or C160-6 (SL2-)- Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-4 (SLU+) or C160-30 (SLU+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-9 (SLU-) or C160-31 (SLU-)- Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-5 (SLP+) or C160-54 (SLP+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-10 (SLP-) or C160-55 (SLP-)- Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-15 (SLS+) or C160-58 (SLS+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-20 (SLS-) or C160-59 (SLS-)- Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-14 (SC1) or C160-3 (SC1)- Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-13 (SC2) or C160-2 (SC2)- Body ground and other terminals |
Always |
10 kΩ or higher |
|
C61-18 (SC3) or C160-1 (SC3)- Body ground and other terminals |
Always |
10 kΩ or higher |
Post-procedure1
(d) Connect the C160 ECM connector.
(e) Connect the C61 transmission wire connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM) |
|
|
4. |
REPLACE ECM |
HINT:
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
5. |
INSPECT TRANSMISSION VALVE BODY ASSEMBLY (SHIFT SOLENOID VALVE SL1, SL2, SLU, SLP, SLS, SC1, SC2 and SC3) |
Click here
| OK |
|
|
|
6. |
REPLACE TRANSMISSION VALVE BODY ASSEMBLY |
HINT:
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
|