- DTC judgment completed
- System normal
| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001R2IP |
| Model Year Start: 2021 | Model: Avalon | Prod Date Range: [08/2020 - ] |
| Title: A25A-FKS (ENGINE CONTROL): SFI SYSTEM: P26AC11,P26AC15; Engine Coolant Bypass Valve "B" Circuit Short to Ground; 2021 - 2022 MY Avalon [08/2020 - ] | ||
|
DTC |
P26AC11 |
Engine Coolant Bypass Valve "B" Circuit Short to Ground |
|
DTC |
P26AC15 |
Engine Coolant Bypass Valve "B" Circuit Short to Battery or Open |
DESCRIPTION
The flow shutting valve (for ATF control) used for the variable cooling system is a magnet type valve that is closed when the engine is warming up to prevent coolant from flowing through the A/T cooler passage which reduces engine warm up time.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P26AC11 |
Engine Coolant Bypass Valve "B" Circuit Short to Ground |
All of the following conditions are met (1 trip detection logic).
|
|
Comes on |
DTC stored |
SAE Code: P26AD |
|
P26AC15 |
Engine Coolant Bypass Valve "B" Circuit Short to Battery or Open |
All of the following conditions are met (1 trip detection logic).
|
|
Comes on |
DTC stored |
SAE Code: P26AE |
Related Data List
|
DTC No. |
Data List |
|---|---|
|
P26AC11 P26AC15 |
Coolant Temperature |
|
Coolant Water Route Switching Valve 2 |
MONITOR DESCRIPTION
If the engine switch on (IG) or the engine is running and the current operating state and target operating state of the flow shutting valve (for ATF control) do not match, the ECM determines that there is an open or short in the flow shutting valve (for ATF control) circuit and stores a DTC.
MONITOR STRATEGY
|
Related DTC |
P26AD: Engine coolant bypass valve range check (low voltage) P26AE: Engine coolant bypass valve range check (high voltage) |
|
Required Sensors/Components (Main) |
Engine coolant bypass valve (for ATF control) |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
3 seconds |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
Monitor runs whenever the following DTCs are not stored |
None |
|
All of the following conditions are met |
- |
|
Either of the following conditions is met |
1 or 2 |
|
1. Both of the following conditions are met |
(a) and (b) |
|
(a) Last commanded to engine coolant bypass valve |
Off |
|
(b) Current command to engine coolant bypass valve |
Off |
|
2. Both of the following conditions are met |
(c) and (d) |
|
(c) Last commanded to engine coolant bypass valve |
On |
|
(d) Current command to engine coolant bypass valve |
On |
|
Battery voltage |
8 V or higher |
|
Engine switch |
On (IG) |
|
Starter |
Off |
P26AD: Engine Coolant Bypass Valve Range Check (Low Voltage)
|
Command to engine coolant bypass valve |
Off |
P26AE: Engine Coolant Bypass Valve Range Check (High Voltage)
|
Command to engine coolant bypass valve |
On |
TYPICAL MALFUNCTION THRESHOLDS
P26AD: Engine Coolant Bypass Valve Range Check (Low Voltage)
|
Engine coolant bypass valve output terminal voltage level |
Low |
P26AE: Engine Coolant Bypass Valve Range Check (High Voltage)
|
Engine coolant bypass valve output terminal voltage level |
High |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
![2021 - 2022 MY Avalon [08/2020 - ]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Make sure to perform this procedure when the engine coolant temperature is between 5 and 40°C (41 and 104°F) and the difference between the engine coolant temperature and intake air temperature is within 10°C (18°F) or less.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- 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 at least 30 seconds.
- Turn the engine switch on (IG) [A].
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Active Test / Activate the Coolant Water Route Switching Valve 2 [B].
- Perform the Active Test Activate the Coolant Water Route Switching Valve 2, select "Close" and wait for 3 seconds or more [C].
- Perform the Active Test Activate the Coolant Water Route Switching Valve 2, select "Open" and wait for 3 seconds or more [D].
- Enter the following menus: Powertrain / Engine / Trouble Codes [E].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P26AC11 or P26AC15.
-
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
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system is malfunctioning.
-
[A] to [E]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
|
1. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF FLOW SHUTTING VALVE (FOR ATF CONTROL)) |
|
*a |
Front view of wire harness connector (to Flow Shutting Valve (for ATF Control) (No. 1 Water By-pass Hose)) |
(a) Disconnect the flow shutting valve (for ATF control) (No. 1 water by-pass hose) connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F3-2 (+FSV) - Body ground |
Engine switch on (IG) |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - FLOW SHUTTING VALVE (FOR ATF CONTROL)) |
|
|
2. |
INSPECT FLOW SHUTTING VALVE (FOR ATF CONTROL) (NO. 1 WATER BY-PASS HOSE) |
(a) Inspect the flow shutting valve (for ATF control) (No. 1 water by-pass hose).
Click here
| NG |
|
REPLACE FLOW SHUTTING VALVE (FOR ATF CONTROL) (NO. 1 WATER BY-PASS HOSE) |
|
|
3. |
CHECK HARNESS AND CONNECTOR (FLOW SHUTTING VALVE (FOR ATF CONTROL) - ECM) |
(a) Disconnect the flow shutting valve (for ATF control) (No. 1 water by-pass hose) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F3-1 (-FSV) - C109-41 (WSV2) |
Always |
Below 1 Ω |
|
F3-1 (-FSV) or C109-41(WSV2) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|