- DTC judgment completed
- System normal
| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001ARN7 |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - ] |
| Title: UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P074011; Torque Converter Clutch Circuit Short to Ground; 2019 - 2022 MY Avalon [04/2018 - ] | ||
|
DTC |
P074011 |
Torque Converter Clutch Circuit Short to Ground |
DESCRIPTION
Solenoid (SL) valve is turned on and off by signals from the ECM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P074011 |
Torque Converter Clutch Circuit Short to Ground |
While the vehicle is being driven so that lock-up is not requested, a short to ground is detected in the solenoid (SL) valve circuit (2-trip detection logic). |
|
Comes on |
DTC stored |
SAE Code: P2769 |
Fail-safe function:
If the ECM detects a malfunction, it turns Solenoid (SL) valve off.
MONITOR DESCRIPTION
Based on the signals from the throttle position sensor, the air flow meter and the crankshaft position sensor, the ECM sends a signal to solenoid (SL) valve to regulate the hydraulic pressure and provide smoother torque converter engagement. Solenoid (SL) valve responds to commands from the ECM. The valve controls the lock-up relay valve to perform the torque-converter lock-up function. If the ECM detects a short to ground in the solenoid (SL) valve circuit, it will illuminate the MIL and store the DTC.
MONITOR STRATEGY
|
Related DTCs |
P2769: Solenoid (SL) valve/Range check |
|
Required sensors/components |
Solenoid (SL) valve |
|
Frequency of operation |
Continuous |
|
Duration |
1 time |
|
MIL operation |
2 driving cycles |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
None |
|
Battery voltage |
8 V or more |
|
Engine switch |
On (IG) |
|
Starter |
OFF |
TYPICAL MALFUNCTION THRESHOLDS
|
All of the following conditions are met |
0.065536 sec. or more |
|
Time after command to solenoid OFF to ON |
0.008192 sec. or more |
|
Command to solenoid |
ON |
|
Solenoid terminal voltage level |
Low |
COMPONENT OPERATING RANGE
|
Solenoid (SL) valve |
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
![2019 - 2022 MY Avalon [04/2018 - ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the engine switch off and wait for 2 minutes or more.
- Turn the engine switch on (IG) and turn the Techstream on.
- Start the engine.
-
Perform the Lock-up Function inspection in 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 / Transmission / Utility / All Readiness.
- Input the DTC: P074011.
-
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 registration and/or initialization when parts related to the automatic transaxle are replaced.
Click here
PROCEDURE
|
1. |
INSPECT TRANSMISSION WIRE (SOLENOID (SL) VALVE) |
|
(a) Disconnect the C52 transmission wire connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
13 (SL) - Body ground |
20°C (68°F) |
11 to 15 Ω |
(c) Connect the C52 transmission wire connector.
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
(a) Disconnect the C56 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C56-62 (SL) - Body ground |
20°C (68°F) |
11 to 15 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM) |
|
|
3. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
|
4. |
INSPECT SOLENOID (SL) VALVE |
|
(a) Remove the solenoid (SL) valve. Click here
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Solenoid (SL) valve connector terminal - Solenoid (SL) valve body |
20°C (68°F) |
11 to 15 Ω |
(c) Connect a positive (+) lead from the battery to the terminal of the solenoid valve connector, and a negative (-) lead to the solenoid body. Check that the valve moves and makes an operating sound.
OK:
Valve moves and makes an operating sound.
| OK |
|
| NG |
|
|
|