THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function)  Power Source Mode does not Change to ON (IG)  


DESCRIPTION

If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode.

Related Data List and Active Test Items
Problem Symptom Data List Item Active Test Item
Power source mode does not change to on (IG) but does change to on (ACC)
Power Source Control
·

Power Supply Condition

·

IG1 Relay Monitor (Inside)

·

IG2 Relay Monitor (Inside)

·

IG1 Relay Monitor (Outside)

·

IG2 Relay Monitor (Outside)

·

IG1 Circuit

·

IG2 Circuit


-

CAUTION / NOTICE / HINT

NOTICE:
·

When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

The smart entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>HOW TO PROCEED WITH TROUBLESHOOTING

·

Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>DIAGNOSTIC TROUBLE CODE CHART

·

If the smart entry and start system is disabled through the customize function, enable the system before performing troubleshooting.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>CUSTOMIZE PARAMETERS

·

Before replacing the certification ECU (smart key ECU assembly), refer to smart entry and start system (for Start Function) Precaution.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>PRECAUTION

·

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

·

After completing repairs, confirm that the problem does not occur.



HINT:

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.


PROCEDURE

1.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the E108 certification ECU (smart key ECU assembly) connector.


b.

Remove the IG2 relay from the engine room relay block and junction block assembly.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E108-9 (IG2D) - IG2 relay terminal 1 Always Below 1 Ω
IG2 relay terminal 2 - Body ground Always Below 1 Ω
E108-9 (IG2D) or IG2 relay terminal 1 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

2.INSPECT IG2 RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.INSPECT IG2 RELAY

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>RELAY>ON-VEHICLE INSPECTION

Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

NG

REPLACE IG2 RELAY

3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the E110 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the 3D and 3C instrument panel junction block assembly connectors.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E110-6 (IG1D) - 3D-25 Always Below 1 Ω
3C-9 - Body ground Always Below 1 Ω
E110-6 (IG1D) or 3D-25 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAY)
a.

Remove the instrument panel junction block assembly.

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


b.

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

B349410C01
1.99,0.531 2.292,0.75 0.302,0.219 5.104,0.531 5.406,0.75 0.302,0.219 5.156,2.167 5.458,2.385 0.302,0.219 1.781,2.167 2.083,2.385 0.302,0.219 0.167,0.167 0.333,0.333 0.167,0.167 10 false *a 2.063,0.552 2.313,0.719 0.25,0.167 10 false 3A 5.219,2.177 5.469,2.344 0.25,0.167 10 false 3C 5.177,0.552 5.427,0.719 0.25,0.167 10 false 3B 1.854,2.177 2.104,2.344 0.25,0.167 10 false 3D
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
·

3B-1 - 3A-38 (IG1 NO. 1 relay)

·

3B-1 - 3A-1 (IG1 NO. 2 relay)

·

3B-1 - 3C-17 (IG1 NO. 3 relay)


Battery voltage not applied to terminals 3D-25 and 3C-9 10 kΩ or higher
Battery voltage applied to terminals 3D-25 and 3C-9 Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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


5.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
a.

Install the instrument panel junction block assembly.

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


b.

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

B445559C04
4.75,0.833 5.177,1.083 0.427,0.25 2.052,0.833 2.479,1.083 0.427,0.25 1.729,2.313 1.979,1.729 false 4.198,2.292 4.365,1.625 false 4.813,0.885 5.271,1.083 0.458,0.198 10 false E110 4.063,2.313 4.521,2.51 0.458,0.198 10 false IG1D 2.115,0.875 2.729,1.073 0.615,0.198 10 false E108 1.583,2.333 2.198,2.531 0.615,0.198 10 false IG2D 0.271,0.188 0.583,0.385 0.313,0.198 10 false *a
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) 		- -


Standard Voltage:
Tester Connection Condition Specified Condition
E108-9 (IG2D) - Body ground Engine switch on (ACC) → Engine switch on (IG) 1 V or less → 9 V or higher
E110-6 (IG1D) - Body ground Engine switch on (ACC) → Engine switch on (IG) 1 V or less → 9 V or higher



Result:
Proceed to
OK
NG



OK

CHECK RELAY CONTACT SIDE CIRCUIT

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)