RM35X0E _51 Engine / Hybrid System _078825 STOP AND START _0382334 STOP AND START SYSTEM C

STOP AND START STOP AND START SYSTEM P253014 Ignition Switch Circuit Short to Ground or Open

DESCRIPTION

If the engine stop and start ECU receives the off signal from the ignition or starter switch assembly*1 or certification ECU (smart key ECU assembly)*2 when communication with the ECM is normal, the engine stop and start ECU will output DTC P253014.

*1: w/o Entry and Start System

*2: w/ Entry and Start System

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Memory	Note
P253014	Ignition Switch Circuit Short to Ground or Open	All of the following conditions are met for 10 seconds or more (1 trip detection logic): · Ignition switch off signal is input. · Communication with the ECM is normal. · Ignition switch (communication) to ON.	· Wire harness or connector · IG2-NO.2 relay · Ignition or starter switch assembly (w/o Entry and Start System) · Certification ECU (Smart key ECU assembly) (w/ Entry and Start System) · Engine stop and start ECU	Does not come on	DTC stored	SAE Code: P2531

CONFIRMATION DRIVING PATTERN

CONFIRMATION AFTER TROUBLESHOOTING

HINT:: ·

If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (51°F) or higher, the refresh charge will be completed.)

·

If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

·

After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

·

Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs: 50002 392

Start the engine and warm it up.

Drive the vehicle at 7 km/h (4 mph) or more.

CAUTION:: When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

for Automatic Transmission:

Depress the brake pedal and stop the vehicle.

for Manual Transmission:

Stop the vehicle, move the shift lever to neutral and release the clutch pedal.

Keep the engine stopped by stop and start control for 10 second or more. (for Automatic Transmission: Keep the shift lever in D.)

for Automatic Transmission:

Release the brake pedal with the shift lever in D to start the engine.

for Manual Transmission:

Depress the clutch pedal and start the engine.

Check that DTCs are not output.

Powertrain > Stop and Start > Trouble Codes: 50001 392

STOP AND START SYSTEM OPERATION CHECK

HINT:: ·

If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (51°F) or higher, the refresh charge will be completed.)

·

If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

·

After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

Start the engine and warm it up.

Turn the air conditioning system off.

Drive the vehicle at 7 km/h (4 mph) or more.

CAUTION:: When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

for Automatic Transmission:

Depress the brake pedal and stop the vehicle.

for Manual Transmission:

Stop the vehicle, move the shift lever to neutral and release the clutch pedal.

Allow the engine to stop by stop and start control. (for Automatic Transmission: Keep the shift lever in D.)

for Automatic Transmission:

Release the brake pedal with the shift lever in D to start the engine.

for Manual Transmission:

Depress the clutch pedal and start the engine.

WIRING DIAGRAM

1.885,5.719 4.635,5.969 2.75,0.25 10 false Instrument Panel Junction Block Assembly 0.625,6.76 3.375,7.01 2.75,0.25 10 false Battery 0.646,2.052 1.292,2.281 0.646,0.229 10 false EFI-MAIN 0.625,0.875 3.375,1.125 2.75,0.25 10 false IG2-MAIN 2.406,2.552 5.156,2.802 2.75,0.25 10 false EFI MAIN 2.365,1.417 3.167,1.625 0.802,0.208 10 false IG2 MAIN 4.229,0.896 4.969,1.188 0.74,0.292 10 false IG2 NO.1 4.219,2.042 5.844,2.385 1.625,0.344 10 false EFI NO.3 3.417,4.51 5.042,4.854 1.625,0.344 10 false METER-IG2 6.344,2.813 6.719,3.167 0.375,0.354 10 false ECM 5.823,0.74 6.198,1.094 0.375,0.354 10 false A2 6.188,2.302 6.698,2.656 0.51,0.354 10 false MREL 5.833,2.094 6.344,2.448 0.51,0.354 10 false 14 6.177,0.74 6.688,1.094 0.51,0.354 10 false IGSW 5.813,0.51 6.323,0.865 0.51,0.354 10 false 18 5.771,3.76 6.146,4.115 0.375,0.354 10 false N32 5.771,4.354 6.146,4.708 0.375,0.354 10 false N33 5.771,4.885 7.156,5.281 1.385,0.396 10 false Engine Stop and Start ECU 6.177,3.75 6.552,4.104 0.375,0.354 10 false +B 6.198,4.354 6.573,4.708 0.375,0.354 10 false IG2 5.802,4.135 6.177,4.49 0.375,0.354 10 false 18 5.854,3.542 6.229,3.896 0.375,0.354 10 false 1 2.74,5.083 5.49,5.333 2.75,0.25 10 false IG2-NO.2 4.385,5.302 5,5.646 0.615,0.344 10 false 3A 1.896,4.344 2.51,4.688 0.615,0.344 10 false 3F 4.365,4.344 4.979,4.688 0.615,0.344 10 false 3B 4.365,4.823 4.979,5.167 0.615,0.344 10 false 3B 1.938,4.125 2.552,4.469 0.615,0.344 10 false 1 4.396,5.094 5.01,5.438 0.615,0.344 10 false 17 4.375,4.135 4.99,4.479 0.615,0.344 10 false 32 4.406,4.615 5.021,4.958 0.615,0.344 10 false 3 2.469,7.208 4.281,7.594 1.813,0.385 10 false Certification ECU (Smart Key ECU Assembly) 2.479,7.042 5.229,7.292 2.75,0.25 10 false N156 4.042,6.677 4.552,7.031 0.51,0.354 10 false 17 2.573,6.667 2.75,7.042 0.177,0.375 10 false 4 3.625,6.542 3.99,6.729 0.365,0.188 10 false IG1D 2.813,6.563 3.219,6.844 0.406,0.281 10 false +B 2.26,1.792 2.771,2.146 0.51,0.354 10 false 3 2.25,2.198 2.76,2.552 0.51,0.354 10 false 1 3.021,1.76 3.531,2.115 0.51,0.354 10 false 5 3.042,2.198 3.552,2.552 0.51,0.354 10 false 2 0.604,2.906 1.125,3.125 0.521,0.219 10 false SMART 1.885,4.823 2.5,5.167 0.615,0.344 10 false 3C 1.896,4.604 2.51,4.948 0.615,0.344 10 false 12 5.833,2.302 6.208,2.656 0.375,0.354 10 false N2 5.542,6.792 7.104,7.208 1.563,0.417 10 false *:Fusible Link Block Assembly (Main Battery) 0.521,3.521 0.677,3.719 0.156,0.198 10 false * 0,0.042 4.771,0.281 4.771,0.24 12 false w/ Entry and Start System:

1.885,5.719 4.635,5.969 2.75,0.25 10 false Instrument Panel Junction Block Assembly 0.625,6.76 3.375,7.01 2.75,0.25 10 false Battery 0.646,2.052 1.292,2.281 0.646,0.229 10 false EFI-MAIN 0.625,0.875 3.375,1.125 2.75,0.25 10 false IG2-MAIN 2.406,2.552 5.156,2.802 2.75,0.25 10 false EFI MAIN 2.365,1.417 3.167,1.625 0.802,0.208 10 false IG2 MAIN 4.229,0.896 4.969,1.188 0.74,0.292 10 false IG2 NO.1 4.219,2.042 5.844,2.385 1.625,0.344 10 false EFI NO.3 3.417,4.51 5.042,4.854 1.625,0.344 10 false METER-IG2 6.344,2.813 6.719,3.167 0.375,0.354 10 false ECM 5.823,0.74 6.198,1.094 0.375,0.354 10 false A2 6.188,2.302 6.698,2.656 0.51,0.354 10 false MREL 5.833,2.094 6.344,2.448 0.51,0.354 10 false 14 6.177,0.74 6.688,1.094 0.51,0.354 10 false IGSW 5.813,0.51 6.323,0.865 0.51,0.354 10 false 18 5.771,3.76 6.146,4.115 0.375,0.354 10 false N32 5.771,4.354 6.146,4.708 0.375,0.354 10 false N33 5.771,4.885 7.156,5.281 1.385,0.396 10 false Engine Stop and Start ECU 6.177,3.75 6.552,4.104 0.375,0.354 10 false +B 6.198,4.354 6.573,4.708 0.375,0.354 10 false IG2 5.802,4.135 6.177,4.49 0.375,0.354 10 false 18 5.854,3.542 6.229,3.896 0.375,0.354 10 false 1 2.74,5.083 5.49,5.333 2.75,0.25 10 false IG2-NO.2 4.385,5.302 5,5.646 0.615,0.344 10 false 3A 1.896,4.344 2.51,4.688 0.615,0.344 10 false 3F 4.365,4.344 4.979,4.688 0.615,0.344 10 false 3B 4.365,4.823 4.979,5.167 0.615,0.344 10 false 3B 1.938,4.125 2.552,4.469 0.615,0.344 10 false 1 4.396,5.094 5.01,5.438 0.615,0.344 10 false 17 4.375,4.135 4.99,4.479 0.615,0.344 10 false 32 4.406,4.615 5.021,4.958 0.615,0.344 10 false 3 2.469,7.208 5.219,7.458 2.75,0.25 10 false Ignition or Starter Switch Assembly 2.479,7.021 5.229,7.271 2.75,0.25 10 false N28 3.979,6.677 4.49,7.031 0.51,0.354 10 false 2 2.594,6.677 2.771,7.052 0.177,0.375 10 false 1 3.604,6.688 3.896,6.969 0.292,0.281 10 false IG2 2.875,6.688 3.281,6.969 0.406,0.281 10 false AM2 2.26,1.792 2.771,2.146 0.51,0.354 10 false 3 2.25,2.198 2.76,2.552 0.51,0.354 10 false 1 3.021,1.76 3.531,2.115 0.51,0.354 10 false 5 3.042,2.198 3.552,2.552 0.51,0.354 10 false 2 1.875,3.354 2.49,3.698 0.615,0.344 10 false 3A 2.458,3.771 3.073,4.115 0.615,0.344 10 false AM2 1.875,3.156 2.49,3.5 0.615,0.344 10 false 44 1.885,4.823 2.5,5.167 0.615,0.344 10 false 3C 1.896,4.604 2.51,4.948 0.615,0.344 10 false 12 5.833,2.302 6.208,2.656 0.375,0.354 10 false N2 0,0.01 4.125,0.208 4.125,0.198 12 false w/o Entry and Start System: 0.531,2.938 0.688,3.135 0.156,0.198 10 false * 5.354,6.792 6.927,7.198 1.573,0.406 10 false *:Fusible Link Block Assembly (Main Battery)

CAUTION / NOTICE / HINT

NOTICE:: ·

Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION201906,999999,_51,_078825,_0382334,RM100000001IKMD,

·

After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION201906,999999,_51,_078825,_0382334,RM100000001IKMD,

·

After replacing the engine stop and start ECU or airbag sensor assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION201906,999999,_51,_078825,_0382334,RM100000001IKMD,

·

for Automatic Transmission:

When the engine stop and start ECU or electromagnetic oil pump is replaced, check the electromagnetic oil pump.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION201906,999999,_51,_078825,_0382334,RM100000001IKMD,

·

Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:: ·

Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>FREEZE FRAME DATA201906,999999,_51,_078825,_0382334,RM100000001IKMF,

·

DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>DTC CHECK / CLEAR201902,999999,_51,_078825,_0382334,RM100000001GBQA,

PROCEDURE

1.READ VALUE USING GTS (IG SWITCH)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Stop and Start / Data List / IG Switch.

Powertrain > Stop and Start > Data List

Tester Display
IG Switch

50003 392 203

According to the display on the GTS, read the Data List.

Result:

GTS Display	Result	Proceed to
IG Switch	ON	A
IG Switch	OFF	B

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING201902,999999,_V1,_078841,_0386803,RM100000001GTWY,

2.CHECK ENGINE STOP AND START ECU (IG2 TERMINAL VOLTAGE)

4.625,0.479 5.146,0.792 0.521,0.313 5.438,2.271 5.104,1.531 true 5.385,2.323 6.042,2.51 0.656,0.188 10 false IG2 4.76,0.542 5.135,0.74 0.375,0.198 10 false N33 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a

Component with harness connected
(Engine Stop and Start ECU)

Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
N33-18 (IG2) - Body ground	Ignition switch ON	9.5 to 14 V

Result:

Proceed to
OK
NG

3.CHECK ENGINE STOP AND START ECU (+B TERMINAL VOLTAGE)

6.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO.2 RELAY))

3.CHECK ENGINE STOP AND START ECU (+B TERMINAL VOLTAGE)

3.26,0.094 3.646,0.365 0.385,0.271 4.104,0.688 4.302,1.479 true 0.865,0.135 1.177,0.333 0.313,0.198 10 false *a 4.313,1.458 4.927,1.656 0.615,0.198 10 false +B 3.344,0.156 3.958,0.354 0.615,0.198 10 false N32

Component with harness connected
(Engine Stop and Start ECU)

Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
N32-1 (+B) - Body ground	Ignition switch ON	9.5 to 14 V

Result:

Proceed to
OK
NG

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL201906,202310,_51,_078825,_0383278,RM100000001IZVW,202310,999999,_51,_078825,_0383278,RM100000002G4R3,

4.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EFI MAIN RELAY)

Disconnect the engine stop and start ECU connector.

Remove the EFI MAIN relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N32-1 (+B) - 5 (EFI MAIN relay)	Always	Below 1 Ω
N32-1 (+B) or 5 (EFI MAIN relay) - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

5.INSPECT EFI MAIN RELAY

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT EFI MAIN RELAY

Inspect the EFI MAIN relay.

Click hereEngine / Hybrid System>1GD-FTV (ENGINE CONTROL)>RELAY>ON-VEHICLE INSPECTION201902,999999,_51,_078856,_0387403,RM100000001GWYM_03_0002,

Result:

Proceed to
OK
NG

GO TO ECM POWER SOURCE CIRCUIT

Click hereEngine / Hybrid System>1GD-FTV (ENGINE CONTROL)>ECD SYSTEM (w/ DPF)>ECM Power Source Circuit201906,999999,_51,_078856,_0385516,RM100000001JEBZ,

REPLACE EFI MAIN RELAY

6.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO.2 RELAY))

Disconnect the engine stop and start ECU connector.

Disconnect the instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N33-18 (IG2) - 3B-32	Always	Below 1 Ω
N33-18 (IG2) or 3B-32 - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

7.CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE)

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE)

0.552,1.094 0.948,1.396 0.396,0.302 0.271,0.125 0.583,0.323 0.313,0.198 10 false *a 0.677,1.177 0.99,1.375 0.313,0.198 10 false 3F

*a	Front view of wire harness connector (to Instrument Panel Junction Block Assembly)

Disconnect the instrument panel junction block assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
3F-1 - Body ground	Always	11 to 14 V

Result:

Proceed to
OK
NG

8.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO.2 RELAY)

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

8.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO.2 RELAY)

Remove the instrument panel junction block assembly.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3F-1 - 3B-32	Battery positive (+) → 3A-17 Battery negative (-) → 3B-3	Below 1 Ω
3F-1 - 3B-32	Battery not connected to 3A-17 and 3B-3	10 kΩ or higher

Result:

Result	Proceed to
OK (w/ Entry and Start System)	A
OK (w/o Entry and Start System)	B
NG	C

9.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO. 2 RELAY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

10.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO.2 RELAY) - IGNITION OR STARTER SWITCH ASSEMBLY)

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2 NO. 2 RELAY)

9.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO. 2 RELAY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

Disconnect the instrument panel junction block assembly connector.

Disconnect the certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3A-17 - N156-17 (IG1D)	Always	Below 1 Ω
3A-17 or N156-17 (IG1D) - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

GO TO ENTRY AND START SYSTEM (ENTRY AND START SYSTEM)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ENTRY AND START SYSTEM (for Start Function)>Power Source Mode does not Change to ON (IG)201906,999999,_58,_078378,_0397001,RM100000001IM4R,

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG2-NO.2 RELAY) - IGNITION OR STARTER SWITCH ASSEMBLY)

Disconnect the instrument panel junction block assembly connector.

Disconnect the ignition or starter switch assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3A-17 - N28-2 (IG2)	Always	Below 1 Ω
3A-17 or N28-2 (IG2) - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

11.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

Inspect the ignition or starter switch assembly.

Click hereEngine / Hybrid System>1GD-FTV (STARTING)>IGNITION SWITCH>INSPECTION201902,999999,_51,_078666,_0382059,RM100000001G3KX,

Result:

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION OR STARTER SWITCH ASSEMBLY)

REPLACE IGNITION OR STARTER SWITCH ASSEMBLY

Click hereEngine / Hybrid System>1GD-FTV (STARTING)>IGNITION SWITCH>REMOVAL201902,999999,_51,_078666,_0382059,RM100000001G3KV,