THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Start Function) B2271 Ignition Hold Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction in the IG1 circuit, IG2 circuit or IG hold circuit in the certification ECU (smart key ECU assembly) is detected.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2271	Ignition Hold Monitor Malfunction	When either of the following conditions is met (1-trip detection logic*1): · The IG1 or IG2 circuit in the certification ECU (smart key ECU assembly) is malfunctioning. · The IG hold circuit in the certification ECU (smart key ECU assembly) is malfunctioning.	· AM2 fuse · Certification ECU (smart key ECU assembly) · Wire harness or connector	DTC Output Confirmation Turn the engine switch on (IG). HINT: To turn the engine switch on (IG), carry an electrical key transmitter sub-assembly and press the engine switch twice with the shift lever in P and the brake pedal2 or clutch pedal3 released.

*1: Only detected while a malfunction is present and the engine switch is on (IG).

*2: except Manual Transaxle

*3: for Manual Transaxle

HINT:: ·

The IG1 and IG2 circuits activate the IG1 and IG2 relays.

·

After the IG1 and IG2 circuits turn on, even if the CPU operates incorrectly, the IG hold circuit maintains the power source mode in on (IG).

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
The engine switch cannot be turned on (IG) (the engine cannot be started).	The power source mode cannot be changed to on (IG).

Related Data List and Active Test Items
DTC No.	Data List Item	Active Test Item
B2271	Power Source Control · IG1 Relay Monitor (Inside) · IG2 Relay Monitor (Inside) · Latch Circuit Starting Control · Ignition	-

WIRING DIAGRAM

0.198,1.677 2.031,1.875 1.833,0.198 10 false from Battery 1.292,1.854 1.75,2.052 0.458,0.198 10 false AM2 2.052,1.5 2.208,1.698 0.156,0.198 10 false 2 1.938,1.708 2.552,1.906 0.615,0.198 10 false E108 1.938,5.083 2.552,5.281 0.615,0.198 10 false E108 3.135,5.771 3.75,5.969 0.615,0.198 10 false E108 2.01,4.875 2.323,5.073 0.313,0.198 10 false 11 3.26,5.563 3.417,5.76 0.156,0.198 10 false 9 2.729,5.771 3.344,5.969 0.615,0.198 10 false IG2D 2.354,5.083 2.51,5.281 0.156,0.198 10 false E 2.354,1.698 2.667,1.896 0.313,0.198 10 false +B 2.74,1.177 3.354,1.375 0.615,0.198 10 false IG1D 3.26,0.969 3.417,1.167 0.156,0.198 10 false 6 3.146,1.177 3.76,1.375 0.615,0.198 10 false E110 3.75,0.563 3.906,0.76 0.156,0.198 10 false 1 3.719,0.99 4.031,1.188 0.313,0.198 10 false 25 3.719,1.177 4.031,1.375 0.313,0.198 10 false 3D 3.708,0.76 4.021,0.958 0.313,0.198 10 false 3B 4.813,1.5 6.188,1.698 1.375,0.198 10 false IG1 NO. 1 5.5,0.958 6.427,1.583 0.927,0.625 10 false ECU-IG NO. 1 6.323,0.573 6.635,0.771 0.313,0.198 10 false 38 6.323,0.76 6.635,0.958 0.313,0.198 10 false 3A 5.75,2.083 6.26,2.51 0.51,0.427 10 false WIPER NO. 1 5.76,3.271 6.281,3.74 0.521,0.469 10 false ECU-IG NO. 4 6.354,1.74 6.51,1.938 0.156,0.198 10 false 1 6.323,1.938 6.635,2.135 0.313,0.198 10 false 3A 6.323,2.938 6.635,3.135 0.313,0.198 10 false 17 6.323,3.125 6.635,3.323 0.313,0.198 10 false 3C 6.354,3.844 6.51,4.042 0.156,0.198 10 false 9 6.323,4.042 6.635,4.24 0.313,0.198 10 false 3C 4.813,2.677 6.188,2.875 1.375,0.198 10 false IG1 NO. 2 4.802,3.865 6.177,4.063 1.375,0.198 10 false IG1 NO. 3 3.792,4.531 6.667,4.958 2.875,0.427 10 false Instrument Panel Junction Block Assembly 4.656,5.25 4.813,5.448 0.156,0.198 10 false 3 4.656,5.656 4.813,5.854 0.156,0.198 10 false 1 5.448,5.25 5.604,5.448 0.156,0.198 10 false 5 5.458,5.667 5.615,5.865 0.156,0.198 10 false 2 5.021,6.083 5.479,6.281 0.458,0.198 10 false IG2 1.885,6.198 3.438,6.833 1.552,0.635 10 false Certification ECU (Smart Key ECU Assembly) 3.531,6.333 7.052,6.719 3.521,0.385 10 false Engine Room Relay Block and Junction Block Assembly

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

·

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 performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

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 (POWER SOURCE)

0.417,1.281 0.823,1.531 0.406,0.25 1.135,1.833 1.302,1.333 false 0.115,0.083 0.427,0.281 0.313,0.198 10 false *a 0.458,1.333 1.073,1.531 0.615,0.198 10 false E108 1.01,1.854 1.323,2.052 0.313,0.198 10 false +B

*a	Rear view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
E108-2 (+B) - Body ground	Always	11 to 14 V

Result:

Proceed to
OK
NG

2.CHECK HARNESS AND CONNECTOR (GROUND)

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

2.CHECK HARNESS AND CONNECTOR (GROUND)

0.417,1.344 0.844,1.625 0.427,0.281 2.042,1.573 2.458,1.823 false 0.469,1.396 1.083,1.594 0.615,0.198 10 false E108 2.51,1.792 2.667,1.99 0.156,0.198 10 false E 0.104,0.083 0.417,0.281 0.313,0.198 10 false *a

*a	Rear view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E108-11 (E) - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

3.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

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

2.063,0.802 2.49,1.083 0.427,0.281 4.667,0.813 5.125,1.094 0.458,0.281 1.729,2.313 1.979,1.729 false 4.167,2.271 4.375,1.615 false 0.49,0.573 0.802,0.771 0.313,0.198 10 false *a 2.115,0.865 2.729,1.063 0.615,0.198 10 false E108 4.74,0.885 5.354,1.083 0.615,0.198 10 false E110 1.521,2.333 2.135,2.531 0.615,0.198 10 false IG2D 3.969,2.302 4.583,2.5 0.615,0.198 10 false IG1D

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

USE SIMULATION METHOD TO CHECK

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

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)