RM38T0EC _51 Engine / Hybrid System _144956 M20F-FXS, M20G-FXS ENGINE CONTROL _0604911 SFI SYSTEM C

M20F-FXS, M20G-FXS 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 auxiliary battery power source is supplied to the IGP and IGR terminals of the ECM. When the ignition switch is off, the auxiliary battery power source is cut off.

When the ignition switch is turned off during driving, the auxiliary battery power source supplied to the IGP terminal is cut off. However, the auxiliary 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 auxiliary battery voltage to the IGR terminal even though there is auxiliary battery voltage to the IGP terminal.

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.

Put the engine in Inspection Mode (Maintenance Mode).

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INSPECTION MODE PROCEDURE

9.

Start the engine and wait 1 minute.

10.

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

11.

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.



12.

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

13.

Input the DTC: P253314.

14.

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.




WIRING DIAGRAM

A539675E01
0.646,7.094 1.938,7.323 1.292,0.229 10 false Auxiliary Battery 0.49,6.25 1.365,6.469 0.875,0.219 10 false BATT MAIN 0.823,3.729 1.354,4.115 0.531,0.385 10 false INP STD NO.1 1.854,3.552 2.167,3.75 0.313,0.198 10 false 8J 1.896,3.344 2.052,3.542 0.156,0.198 10 false 1 2.323,2.479 2.75,2.677 0.427,0.198 10 false 8C 2.625,2.49 2.938,2.688 0.313,0.198 10 false 17 3.073,2.479 3.469,2.688 0.396,0.208 10 false 8B 3.385,2.5 3.698,2.698 0.313,0.198 10 false 24 3.219,2.823 3.677,3.021 0.458,0.198 10 false AM2 1.51,5.74 3.656,5.938 2.146,0.198 10 false IGP-MAIN 2.25,5.438 2.406,5.635 0.156,0.198 10 false 5 3.073,5.448 3.229,5.646 0.156,0.198 10 false 3 2.26,5.875 2.417,6.073 0.156,0.198 10 false 2 3.073,5.875 3.229,6.073 0.156,0.198 10 false 1 3.698,4.552 4.01,4.75 0.313,0.198 10 false 8E 4.01,4.552 4.323,4.75 0.313,0.198 10 false 14 3.938,3.865 5.313,4.063 1.375,0.198 10 false IGR NO.1 3.719,2.479 4.125,2.677 0.406,0.198 10 false 8B 4,2.49 4.313,2.688 0.313,0.198 10 false 10 4.708,3.219 5.302,3.573 0.594,0.354 10 false ECU-IGR NO.1 5.385,3.042 5.698,3.24 0.313,0.198 10 false 8E 5.406,2.865 5.719,3.063 0.313,0.198 10 false 22 5.396,3.552 5.802,3.781 0.406,0.229 10 false 8B 5.417,3.375 5.729,3.573 0.313,0.198 10 false 36 5.396,4.115 5.781,4.365 0.385,0.25 10 false 8C 5.417,3.906 5.729,4.104 0.313,0.198 10 false 41 4.063,5.75 6.052,5.948 1.99,0.198 10 false ECU-IGP NO.1 6.281,3.052 6.74,3.25 0.458,0.198 10 false IGR 6.021,2.938 6.333,3.135 0.313,0.198 10 false 14 6.281,5.563 6.74,5.76 0.458,0.198 10 false IGP 6.063,5.448 6.219,5.646 0.156,0.198 10 false 2 6.281,6.073 6.594,6.271 0.313,0.198 10 false E1 6.031,5.948 6.344,6.146 0.313,0.198 10 false 10 6.448,6.469 6.906,6.667 0.458,0.198 10 false A47 6.448,6.656 6.854,6.885 0.406,0.229 10 false ECM 4.167,1.573 7.021,1.813 2.854,0.24 10 false Certification ECU (smart key ECU assembly) 1.688,4.792 5.052,4.99 3.365,0.198 10 false Power Distribution Box Assembly 4.417,1.167 4.875,1.365 0.458,0.198 10 false I223 4.781,1.177 5.396,1.375 0.615,0.198 10 false IGRD 4.417,0.75 4.875,0.948 0.458,0.198 10 false I222 4.5,0.563 4.656,0.76 0.156,0.198 10 false 6 4.458,0.979 4.771,1.177 0.313,0.198 10 false 11 4.781,0.75 5.094,0.948 0.313,0.198 10 false +B 4.427,0.354 4.885,0.552 0.458,0.198 10 false I223 4.479,0.167 4.792,0.365 0.313,0.198 10 false 24 4.792,0.344 5.406,0.542 0.615,0.198 10 false IGPD 2.427,6.302 4.573,6.5 2.146,0.198 10 false IGP-MAIN 3.073,3.542 3.385,3.74 0.313,0.198 10 false IC 0.469,4.542 1.24,4.74 0.771,0.198 10 false DC/DC

MONITOR RESULT

NOTICE:
·

Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>VEHICLE CONTROL HISTORY (RoB)

(Select Powertrain in Health Check and then check the time stamp data.)

·

If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>VEHICLE CONTROL HISTORY (RoB)



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

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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 Condition Specified Condition
A47-14 (IGR) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (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
8E-22 - A47-14 (IGR) Always Below 1 Ω
8E-22 or A47-14 (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 connectors.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
8B-36 - Body ground Always Below 1 Ω
8C-41 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR