M20D-FKS ENGINE CONTROL SFI SYSTEM P26AC11 Engine Coolant Bypass Valve "B" Circuit Short to Ground P26AC15 Engine Coolant Bypass Valve "B" Circuit Short to Battery or Open
DESCRIPTION
The flow shutting valve (for CVT) 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 continuously variable transaxle 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).
·
An open signal is being sent from the ECM to the flow shutting valve (for CVT). ·
Current operating state and target operating state differ for 3 seconds or more continuously. |
·
Open or short in flow shutting valve (for CVT) circuit ·
Flow shutting valve (for CVT) ·
ECM |
Comes on | DTC stored | SAE: P26AD |
| P26AC15 | Engine Coolant Bypass Valve "B" Circuit Short to Battery or Open | All of the following conditions are met (1 trip detection logic).
·
A close signal is being sent from the ECM to the flow shutting valve (for CVT). ·
Current operating state and target operating state differ for 3 seconds or more continuously. |
·
Open or short in flow shutting valve (for CVT) circuit ·
Flow shutting valve (for CVT) ·
ECM |
Comes on | DTC stored | SAE: P26AE |
| DTC No. | Data List |
|---|---|
| P26AC11
P26AC15 |
Coolant Temperature |
| Coolant Water Route Switching Valve 2 |
MONITOR DESCRIPTION
If the ignition switch ON or the engine is running and the current operating state and target operating state of the flow shutting valve (for CVT) do not match, the ECM determines that there is an open or short in the flow shutting valve (for CVT) circuit and stores a DTC.
MONITOR STRATEGY
| Required Sensors/Components | Engine coolant bypass valve (for CVT) |
| Frequency of Operation | Continuous |
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.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
·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 GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON [A].
Turn the GTS 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.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System 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.
·If the judgment result is INCOMPLETE, perform steps [B] through [E] again.
·[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 GTS. 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
| *a | Front view of wire harness connector
(to Flow Shutting Valve (for CVT)) |
Disconnect the flow shutting valve (for CVT) connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C26-2 - Body ground Ignition Switch ON 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Inspect the flow shutting valve (for CVT).
- Result:
Proceed to OK NG
OK
NG
Disconnect the flow shutting valve (for CVT) connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C26-1 - C71-91 (WSV2) Always Below 1 Ω C26-1 or C71-91 (WSV2) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG