RM38N0EC _51 Engine / Hybrid System _111785 M20C-FKS, M20D-FKS ENGINE CONTROL _0504416 SFI SYSTEM C

M20C-FKS, M20D-FKS ENGINE CONTROL  SFI SYSTEM  P268111  Engine Coolant Bypass Valve Circuit Short to Ground  P268115  Engine Coolant Bypass Valve Circuit Short to Battery or Open  


DESCRIPTION

The flow shutting valve (for heater) 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 heater passage which reduces engine warm up time.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note
P268111 Engine Coolant Bypass Valve 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 heater).

·

A short between the flow shutting valve(for heater) circuit and power source circuit continues for 3 seconds or more.


·

Open or short in flow shutting valve (for heater) circuit

·

Flow shutting valve (for heater)

·

ECM


Does not come on SAE Code: P2682
P268115 Engine Coolant Bypass Valve 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 heater).

·

An open or short in the flow shutting valve(for heater) circuit continues for 3 seconds or more.


·

Open or short in flow shutting valve (for heater) circuit

·

Flow shutting valve (for heater)

·

ECM


Does not come on SAE Code: P2683

Related Data List
DTC No. Data List
P268111
P268115 		Coolant Temperature
Coolant Water Route Switching Valve

MONITOR DESCRIPTION

The ECM monitors the output voltage while the flow shutting valve (for heater) is operating.

The flow shutting valve (for heater) turns on and off according to ON/OFF switching of a transistor inside the ECM.

If a continuous mismatch occurs between the ECM transistor state and the output voltage, the ECM determines there is a malfunction in the flow shutting valve (for heater) circuit and stores a DTC.

CONFIRMATION DRIVING PATTERN

HINT:

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.


1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON.

3.

Turn the GTS on.

4.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

5.

Turn the ignition switch off and wait for at least 30 seconds.

6.

Turn the ignition switch to ON [A].

7.

Turn the GTS on.

8.

Enter the following menus: Powertrain / Engine / Active Test / Activate the Coolant Water Route Switching Valve [B].

9.

Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Close" and wait for 3 seconds or more [C].

10.

Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Open" and wait for 3 seconds or more [D].

11.

Enter the following menus: Powertrain / Engine / Trouble Codes [E].

12.

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.



13.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

14.

Input the DTC: P268111 or P268115.

15.

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.




WIRING DIAGRAM

A470445E05
1.667,1.875 2.729,2.073 1.063,0.198 10 false EFI-MAIN NO. 1 0.51,1.25 1.573,1.448 1.063,0.198 10 false EFI-MAIN NO. 1 2.708,1.26 3.365,1.438 0.656,0.177 10 false EFI NO. 2 1.75,1 1.917,1.208 0.167,0.208 10 false 3 2.417,1 2.583,1.208 0.167,0.208 10 false 5 1.75,1.5 1.917,1.708 0.167,0.208 10 false 1 2.417,1.49 2.583,1.698 0.167,0.208 10 false 2 3.688,0.979 3.854,1.188 0.167,0.208 10 false 2 4.969,0.969 5.135,1.177 0.167,0.208 10 false 1 3.563,1.438 3.875,1.635 0.313,0.198 10 false C69 3.573,1.594 5.781,2.281 2.208,0.688 10 false Flow Shutting Valve (for Heater) 5.323,1.094 5.76,1.469 0.438,0.375 10 false C115 5.313,3 5.844,3.354 0.531,0.354 10 false A109 5.75,0.969 6.24,1.188 0.49,0.219 10 false WSV1 5.75,2.875 6.208,3.063 0.458,0.188 10 false MREL 5.406,0.896 5.604,1.104 0.198,0.208 10 false 92 5.406,2.802 5.573,3.01 0.167,0.208 10 false 26 5.313,3.688 5.938,4.042 0.625,0.354 10 false A109 5.406,3.49 5.573,3.698 0.167,0.208 10 false 22 5.74,3.698 6.052,3.896 0.313,0.198 10 false E1 6.125,4.156 6.552,4.375 0.427,0.219 10 false ECM 0.677,3.76 1.542,3.948 0.865,0.188 10 false Battery 0.5,2.844 1.573,3.042 1.073,0.198 10 false FL MAIN

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

1.CHECK TERMINAL VOLTAGE (POWER SOURCE OF FLOW SHUTTING VALVE (FOR HEATER))
a.

Disconnect the flow shutting valve (for heater) connector.


b.

Turn the ignition switch to ON.


c.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Switch Condition Specified Condition

Click Location & Routing(C69)Location & Routing

Click Connector(C69)Engine Compartment>Engine Wire>Water Valve (for Heater Control)

C69-2 - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

2.INSPECT FLOW SHUTTING VALVE (FOR HEATER)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - FLOW SHUTTING VALVE (FOR HEATER))

3.CHECK HARNESS AND CONNECTOR (FLOW SHUTTING VALVE (FOR HEATER) - ECM)
a.

Disconnect the flow shutting valve (for heater) 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

Click Location & Routing(C69,C115)Location & Routing

Click Connector(C69)Engine Compartment>Engine Wire>Water Valve (for Heater Control)

Click Connector(C115)Engine Compartment>Engine Wire>ECM

C69-1 - C115-92 (WSV1) Always Below 1 Ω
C69-1 or C115-92 (WSV1) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR