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

M20C-FKS, M20D-FKS ENGINE CONTROL  SFI SYSTEM  P253314  Ignition Switch On/Start Position Circuit Low Circuit Short to Ground or Open  


DESCRIPTION

When the ignition switch is turned to ON, the battery power source is supplied to the IGP and IGR terminals of the ECM. When the ignition switch is off, the battery power source is cut off.

When the ignition switch is turned off during driving, the battery power source supplied to the IGP terminal is cut off. However, the battery power source supplied to the IGR terminal is supplied until the vehicle is stopped and the ignition switch is turned off.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note
P253314 Ignition Switch On/Start Position Circuit Low Circuit Short to Ground or Open Short to ground or open in IGR terminal circuit (2 trip detection logic).
·

Power Distribution Box Assembly

·

Wire harness or connector

·

ECM


Does not come on SAE Code: P2534

MONITOR DESCRIPTION

The ECM stores a DTC when there is no battery voltage to the IGR terminal even though there is battery voltage to the IGP terminal.

WIRING DIAGRAM

A470455E10
0.594,6.74 1.51,6.938 0.917,0.198 10 false Battery 1.719,5.865 2.344,6.177 0.625,0.313 10 false IGP 2.74,6.448 3.365,6.76 0.625,0.313 10 false IGP 4.208,5.854 5.469,6.219 1.26,0.365 10 false ECU-IGP NO.1 6.156,6.219 6.781,6.531 0.625,0.313 10 false E1 6.167,5.719 6.792,6.031 0.625,0.313 10 false IGP 2.917,2.688 3.542,3 0.625,0.313 10 false AM2 0.438,5 1.594,5.198 1.156,0.198 10 false INP STD NO.1-3 6.167,1.198 6.792,1.51 0.625,0.313 10 false IGPD 6.167,0.771 6.792,1.083 0.625,0.313 10 false +B 6.167,0.375 6.792,0.688 0.625,0.313 10 false IGRD 3.969,3.844 4.594,4.156 0.625,0.313 10 false IGR NO.1 4.74,3.208 5.375,4.156 0.635,0.948 10 false ECU-IGR NO.1 6.146,3.073 6.771,3.385 0.625,0.313 10 false IGR 6.01,6.771 6.635,7.083 0.625,0.313 10 false A109 6.417,6.76 6.792,7.083 0.375,0.323 10 false ECM 5.5,3.073 6.125,3.385 0.625,0.313 10 false 4D 3.427,4.448 4.052,4.76 0.625,0.313 10 false 4D 3.427,2.229 4.052,2.542 0.625,0.313 10 false 4C 2.74,2.208 3.365,2.521 0.625,0.313 10 false 4B 0.74,3.073 1.365,3.385 0.625,0.313 10 false 4H 2.052,2.208 2.677,2.521 0.625,0.313 10 false 4B 0.771,2.885 1.396,3.198 0.625,0.313 10 false 1 2.177,2.406 2.802,2.719 0.625,0.313 10 false 11 2.865,2.406 3.49,2.719 0.625,0.313 10 false 9 3.563,2.406 4.188,2.719 0.625,0.313 10 false 17 3.563,4.271 4.188,4.583 0.625,0.313 10 false 13 5.5,2.885 6.125,3.198 0.625,0.313 10 false 22 5.99,1.698 7.156,2.417 1.167,0.719 10 false Certification ECU (smart key ECU assembly) 5.813,1.188 6.438,1.5 0.625,0.313 10 false A15 5.823,0.375 6.448,0.688 0.625,0.313 10 false A15 5.823,0.771 6.448,1.083 0.625,0.313 10 false E52 5.896,0.583 6.521,0.896 0.625,0.313 10 false 6 5.865,1.01 6.49,1.323 0.625,0.313 10 false 24 5.854,0.198 6.479,0.51 0.625,0.313 10 false 11 2.406,6.01 3.031,6.323 0.625,0.313 10 false 2 3.198,6.021 3.823,6.333 0.625,0.313 10 false 1 3.198,5.604 3.823,5.917 0.625,0.313 10 false 3 2.396,5.604 3.021,5.917 0.625,0.313 10 false 5 5.896,2.969 6.521,3.281 0.625,0.313 10 false 33 5.896,5.625 6.521,5.938 0.625,0.313 10 false 30 5.896,6.115 6.521,6.427 0.625,0.313 10 false 22 0.719,4.656 3.75,4.99 3.031,0.333 10 false Power Distribution Box Assembly 5.51,3.573 6.135,3.885 0.625,0.313 10 false 4B 5.5,3.969 6.125,4.281 0.625,0.313 10 false 4C 5.51,3.396 6.135,3.708 0.625,0.313 10 false 36 5.51,3.802 6.135,4.115 0.625,0.313 10 false 41 0.438,6.094 1.51,6.292 1.073,0.198 10 false FL MAIN

CONFIRMATION DRIVING PATTERN

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.

7.

Turn the GTS on.

8.

Wait 1 minute or more.

9.

Enter the following menus: Powertrain / Engine / Trouble Codes.

10.

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.



11.

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

12.

Input the DTC: P253314

13.

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 shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system is malfunctioning.




CAUTION / NOTICE / HINT

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.READ VALUE USING GTS (IGR)
a.

Read the Data List.

Powertrain > Engine > Data List
Tester Display
IGR
50003 372 1232
Result:
Result Proceed to
The value of IGR is ON A
None of the above conditions are met B




A

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


B

2.CHECK TERMINAL VOLTAGE (IGR VOLTAGE)
2.CHECK TERMINAL VOLTAGE (IGR VOLTAGE)
a.

Disconnect the ECM 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(A109)Location & Routing

Click Connector(A109)Engine Compartment>Engine Room Main Wire / Transmission Wire>ECM

A109-33 (IGR) - Body ground Ignition switch ON 11 to 14 V


Result:
Proceed to
OK
NG




OK

REPLACE ECM

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


NG

3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - ECM)
3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - ECM)
a.

Disconnect the ECM connector.


b.

Disconnect the power distribution box assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(A109)Location & Routing

Click Connector(A109)Engine Compartment>Engine Room Main Wire / Transmission Wire>ECM

4D-22 - A109-33 (IGR) Always Below 1 Ω
4D-22 or A109-33 (IGR) - Body ground and other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG




OK

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)
a.

Disconnect the power distribution box assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4B-36 - Body ground Always Below 1 Ω
4C-41 - Body ground Always Below 1 Ω


Result:
Proceed to
OK
NG




OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR