- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001GYSP |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [01/2019 - 11/2022] |
| Title: K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P099B,P099C; Shift Solenoid "G" Control Circuit Low (Shift Solenoid Valve SC); 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022] | ||
|
DTC |
P099B |
Shift Solenoid "G" Control Circuit Low (Shift Solenoid Valve SC) |
|
DTC |
P099C |
Shift Solenoid "G" Control Circuit High (Shift Solenoid Valve SC) |
DESCRIPTION
Based on the signal received by the shift solenoid valve SC, the ECM uses the shift solenoid valve SLU to control the forward and reverse clutch pressure.
If there is an open or short in the shift solenoid valve SC circuit, the ECM stops sending current to the malfunctioning shift solenoid valve.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
|---|---|---|---|---|---|
|
P099B |
Shift Solenoid "G" Control Circuit Low (Shift Solenoid Valve SC) |
While the vehicle is driven, there is a short in the shift solenoid valve SC circuit for 3 seconds (1-trip detection logic). |
|
Comes on |
DTC stored |
|
P099C |
Shift Solenoid "G" Control Circuit High (Shift Solenoid Valve SC) |
While the vehicle is driven, there is an open or short to +B in the shift solenoid valve SC circuit for 0.5 seconds (1-trip detection logic). |
|
Comes on |
DTC stored |
MONITOR DESCRIPTION
These DTCs indicate an open or short in the shift solenoid valve SC circuit. If there is an open or short in the shift solenoid valve SC circuit, the ECM detects the malfunction, illuminates the MIL and stores a DTC.
MONITOR STRATEGY
|
Related DTCs |
P099B: Shift solenoid valve SC / Range check P099C: Shift solenoid valve SC / Range check |
|
Required sensors/Components |
Continuously variable transaxle assembly (Shift solenoid valve SC) |
|
Frequency of operation |
Continuous |
|
Duration |
1 time |
|
MIL operation |
Immediately |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not present |
None |
|
Battery voltage |
8 V or more |
|
Time after battery voltage is 8 V or more |
0.5 seconds or more |
|
Write inhibit |
Permit |
|
Time after write status forbiddance to permit |
0.5 seconds or more |
|
Ignition switch |
ON |
|
Time after ignition switch OFF to ON |
0.5 seconds or more |
|
Starter |
OFF |
|
Time after starter ON to OFF |
0.5 seconds or more |
TYPICAL MALFUNCTION THRESHOLDS
P099B:
|
All of the following conditions are met: |
3 seconds or more |
|
Command to solenoid |
ON |
|
Time after command to solenoid OFF to ON |
0.008192 seconds or more |
|
Solenoid terminal voltage level (Shift solenoid valve SC) |
Low |
P099C:
|
All of the following conditions are met: |
0.5 seconds or more |
|
Command to solenoid |
OFF |
|
Time after command to solenoid ON to OFF |
0.008192 seconds or more |
|
Solenoid terminal voltage level (Shift solenoid valve SC) |
High |
COMPONENT OPERATING RANGE
|
Shift solenoid valve SC |
Resistance: 11 to 15 Ω at 20°C (68°F) |
CONFIRMATION DRIVING PATTERN
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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.
-
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
Click here
![2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- 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.
- Turn the ignition switch to ON and turn the Techstream on.
- Start the engine.
-
Drive the vehicle and confirm the lock-up on and off conditions according to Road Test. [*1]
Click here
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Stop the vehicle.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P099B or P099C.
-
Check the DTC judgment result.
Techstream 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 the universal trip to clear permanent DTCs.
Click here
-
Perform initialization when parts related to the continuously variable transaxle system are replaced.
Click here
-
Check that no DTCs are stored after performing initialization.
Click here
PROCEDURE
|
1. |
INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SC) |
|
(a) Disconnect the C60 transmission wire connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
9 (SC) - Body ground |
20°C (68°F) |
11 to 15 Ω |
(c) Connect the C60 transmission wire connector.
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
(a) Disconnect the C77 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C77-41 (SC) - Body ground |
20°C (68°F) |
11 to 15 Ω |
(c) Connect the C77 ECM connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM) |
|
|
3. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
|
4. |
REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY |
(a) Replace the continuously variable transaxle assembly.
Click here
| NEXT |
|
|
|