RM36D0EC _51 Engine / Hybrid System _087036 M20C-FKS ENGINE CONTROL _0418131 SFI SYSTEM C

M20C-FKS ENGINE CONTROL SFI SYSTEM P261029 ECM/PCM Engine Off Timer Performance Signal Invalid P261093 ECM/PCM Engine Off Timer Performance No Operation

DTC SUMMARY

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P261029	ECM/PCM Engine Off Timer Performance Signal Invalid	ECM internal malfunction	ECM	Comes on	DTC stored	SAE: P2610
P261093	ECM/PCM Engine Off Timer Performance No Operation	ECM internal malfunction	ECM	Comes on	DTC stored	SAE: P2610

DTC No.	Monitoring Item	Detection Timing	Detection Logic
P261029	Soak timer (built into ECM)	EVAP monitoring (ignition switch off)	2 trip
P261093	Soak timer (built into ECM)	Ignition switch ON	2 trip

DESCRIPTION

The soak timer operates after the ignition switch is turned off. When a certain amount of time has elapsed after turning the ignition switch off, the soak timer activates the ECM to perform malfunction checks which can only be performed after the engine is stopped. The soak timer is built into the ECM.

0.146,1.885 1.979,2.083 1.833,0.198 10 false from Battery 2.146,1.01 2.74,1.24 0.594,0.229 10 false IGP 2.917,1.583 4.292,1.781 1.375,0.198 10 false IGP 1.365,1.99 4.615,2.677 3.25,0.688 10 false from Certification ECU (Smart Key ECU Assembly)*1 or Ignition Switch Assembly*2 3.604,1.031 4.781,1.302 1.177,0.271 10 false ECU-IGP NO. 1 4.458,0.75 5.073,0.948 0.615,0.198 10 false IGP 5,1.125 5.75,1.625 0.75,0.5 10 false Soak Timer IC 4.5,2.896 4.813,3.094 0.313,0.198 10 false +B 5.063,2.781 5.698,3.531 0.635,0.75 10 false Power Source IC 4.292,3.698 4.906,3.896 0.615,0.198 10 false MREL 5,3.594 5.74,4.25 0.74,0.656 10 false Main Relay Control IC 5.698,4.323 6.156,4.521 0.458,0.198 10 false ECM 2.615,4.125 4.76,4.323 2.146,0.198 10 false EFI-MAIN NO. 1 1.333,3.552 3.479,3.75 2.146,0.198 10 false EFI-MAIN NO. 1 0.135,4.406 2.708,4.792 2.573,0.385 10 false *2: w/o Smart Entry and Start System 0.125,4.083 2.615,4.396 2.49,0.313 10 false *1: w/ Smart Entry and Start System

MONITOR DESCRIPTION

While the ignition switch is off, the ECM monitors the synchronization of the soak timer and the CPU clock. If these two are not synchronized, the ECM interprets this as a malfunction, illuminates the MIL and stores the DTC.

If the soak timer activates the ECM even though only a short amount of time has elapsed since the ignition switch was turned off, or if the soak timer does not activate the ECM even though a considerable amount of time has elapsed since the ignition switch was turned off, the ECM determines that the soak timer is malfunctioning, illuminates the MIL and stores a DTC the next time the ignition switch is turned to ON.

MONITOR STRATEGY

Required Sensors/Components	ECM
Frequency of Operation	Once per driving cycle

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 hereEngine / Hybrid System>M20C-FKS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR202405,999999,_51,_087036,_0418131,RM100000002IFF9,

·

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Click hereEngine / Hybrid System>M20C-FKS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR202405,999999,_51,_087036,_0418131,RM100000002IFF9,

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.

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].

Turn the ignition switch off and wait for at least 15 seconds [B].

Start the engine [C].

Stop the engine and leave the vehicle for 60 minutes or more [D].

10.

Turn the ignition switch to ON.

11.

Turn the GTS on.

12.

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

13.

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.

14.

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

15.

Input the DTC: P261029 or P261093.

16.

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 has a malfunction.

·

[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.

CAUTION / NOTICE / HINT

HINT:: ·

DTC P261029 or P261093 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.

·

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.REPLACE ECM

Replace the ECM.

Click hereEngine / Hybrid System>M20C-FKS (ENGINE CONTROL)>ECM>REMOVAL202405,999999,_51,_087036,_0418140,RM100000002JM0N,

Result:

Proceed to
NEXT

2.CLEAR DTC

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Clear the DTCs.

Powertrain > Engine > Clear DTCs: 50002 372

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

Result:

Proceed to
NEXT

3.CHECK WHETHER DTC OUTPUT RECURS (DTC P261029 OR P261093)

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

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

Read the Pending DTCs.

Powertrain > Engine > Trouble Codes: 50001 372

HINT:: If no pending DTC is output, the repair has been successfully completed.

Result:

Proceed to
NEXT

END