THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function)  B2274  ACC Monitor Malfunction  


DESCRIPTION

This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit that goes from the ACC output terminal of the certification ECU (smart key ECU assembly) to the ACC relay.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2274 ACC Monitor Malfunction Malfunction in the ACC relay circuit in the certification ECU (smart key ECU assembly) or in the external circuit (1-trip detection logic*1).
HINT:

When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning.


·

AM2 fuse

·

ACC relay (Instrument panel junction block assembly)

·

Certification ECU (smart key ECU assembly)

·

Wire harness or connector


DTC Output Confirmation Operation

Wait 10 seconds after turning the engine switch on (ACC) or on (IG), and then wait another 10 seconds after turning the engine switch off.

HINT:

To turn the engine switch on (ACC), carry an electrical key transmitter sub-assembly and press the engine switch with the shift lever in P and the brake pedal*2 or clutch pedal*3 released.




·

*1: Only detected while a malfunction is present.

·

*2: except Manual Transaxle

·

*3: for Manual Transaxle


Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
·

If there is a malfunction due to the relay being stuck on, the ACC relay does not turn off even though the engine switch is off.

·

If there is a malfunction due to the relay being stuck off, the ACC relay does not turn on even though the engine switch is on (ACC).


HINT:

The engine switch can be turned on (IG) and the engine can be started.


-

Related Data List and Active Test Items
DTC No. Data List Item Active Test Item
B2274
Power Source Control
·

ACC Relay Monitor


Starting Control
·

Ignition


-

WIRING DIAGRAM

B483517E01
0.146,1.073 1.979,1.271 1.833,0.198 10 false from Battery 1.635,1.24 2.094,1.438 0.458,0.198 10 false AM2 2.438,0.885 2.594,1.083 0.156,0.198 10 false 2 2.333,1.083 2.948,1.281 0.615,0.198 10 false E108 2.333,2.24 2.948,2.438 0.615,0.198 10 false E108 2.406,2.031 2.719,2.229 0.313,0.198 10 false 11 2.74,1.073 3.052,1.271 0.313,0.198 10 false +B 2.75,2.24 2.906,2.438 0.156,0.198 10 false E 3.052,1.74 3.667,1.938 0.615,0.198 10 false ACCD 3.656,1.531 3.813,1.729 0.156,0.198 10 false 4 3.531,1.74 4.146,1.938 0.615,0.198 10 false E110 4.302,1.135 4.458,1.333 0.156,0.198 10 false 1 4.271,1.333 4.583,1.531 0.313,0.198 10 false 3B 4.292,1.552 4.604,1.75 0.313,0.198 10 false 26 4.281,1.74 4.594,1.938 0.313,0.198 10 false 3D 5.5,2.052 5.958,2.25 0.458,0.198 10 false ACC 5.99,1.458 6.448,1.656 0.458,0.198 10 false ACC 6.417,1.146 6.729,1.344 0.313,0.198 10 false 20 6.406,1.333 6.719,1.531 0.313,0.198 10 false 3A 6.417,1.74 6.729,1.938 0.313,0.198 10 false 3C 6.448,1.552 6.604,1.75 0.156,0.198 10 false 9 2.385,2.885 3.917,3.521 1.531,0.635 10 false Certification ECU (Smart Key ECU Assembly) 4.146,2.417 7.01,2.865 2.865,0.448 10 false Instrument Panel 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)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>B2271

Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (GROUND)

NG

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

2.CHECK HARNESS AND CONNECTOR (GROUND)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>B2271

Result:
Proceed to
OK
NG



OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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 instrument panel junction block assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E110-4 (ACCD) - 3D-26 Always Below 1 Ω
3C-9 - Body ground Always Below 1 Ω
E110-4 (ACCD) or 3D-26 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC 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.

B349407C01
5.563,2.052 5.896,2.25 0.333,0.198 2.25,2.052 2.583,2.25 0.333,0.198 1.573,0.302 1.906,0.5 0.333,0.198 5.083,0.302 5.417,0.5 0.333,0.198 0.167,0.167 0.333,0.333 0.167,0.167 10 false *a 1.656,0.313 1.906,0.479 0.25,0.167 10 false 3D 5.167,0.313 5.417,0.479 0.25,0.167 10 false 3C 2.333,2.063 2.583,2.229 0.25,0.167 10 false 3A 5.646,2.063 5.896,2.229 0.25,0.167 10 false 3B
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
3B-1 - 3A-20 Battery voltage not applied to terminals 3D-26 and 3C-9 10 kΩ or higher
Battery voltage applied to terminals 3D-26 and 3C-9 Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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


5.INSPECT 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.
B483518C01
1.406,0.271 1.802,0.552 0.396,0.281 0.896,1.865 1.135,1.063 false 1.448,0.344 2.063,0.542 0.615,0.198 10 false E110 0.156,0.135 0.469,0.333 0.313,0.198 10 false *a 0.719,1.885 1.333,2.083 0.615,0.198 10 false ACCD
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))


Reconnect the E108 and E110 certification ECU (smart key ECU assembly) connectors.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
E110-4 (ACCD) - Body ground Engine switch off → Engine switch on (ACC) 1 V or less → 8.5 V or higher



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

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


NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)