RM3660EC _58 Vehicle Interior _080747 THEFT DETERRENT / KEYLESS ENTRY _0586354 SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series)) C

THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series))  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 between terminal ACCD of the certification ECU (smart key ECU assembly) and the ACC relay.

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

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


·

Driver side 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.



*: Only detected while a malfunction is present.


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 ACC 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 ACC 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 and Active Test
B2274
Power Source Control
·

ACC Relay Monitor


Starting Control
·

Ignition



WIRING DIAGRAM

B481556E40
2.198,1.396 2.76,1.667 0.563,0.271 10 false ACC 1.104,1.656 4.052,1.906 2.948,0.25 10 false Driver Side Junction Block Assembly 5.49,1.625 6.052,1.896 0.563,0.271 10 false I1 5.479,1.792 6.99,2.25 1.51,0.458 10 false Certification ECU (Smart Key ECU Assembly) 5.792,1.042 6.354,1.313 0.563,0.271 10 false ACCD 5.531,1.042 6.094,1.313 0.563,0.271 10 false 16 6.125,0.646 6.688,0.917 0.563,0.271 10 false +B 0.854,0.635 1.417,0.906 0.563,0.271 10 false 4A 0.865,1.115 1.427,1.385 0.563,0.271 10 false 4F 3.417,0.635 3.979,0.906 0.563,0.271 10 false 4D 3.458,0.458 4.021,0.729 0.563,0.271 10 false 1 3.438,0.948 4,1.219 0.563,0.271 10 false 30 0.896,0.938 1.458,1.208 0.563,0.271 10 false 3 0.854,0.458 1.417,0.729 0.563,0.271 10 false 26 1.323,0.792 2.094,1.042 0.771,0.25 10 false ECU-ACC 3.427,1.115 3.99,1.385 0.563,0.271 10 false 4E 6.563,0.979 6.948,1.281 0.385,0.302 10 false IC

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, Gasoline Model (NR Series))>HOW TO PROCEED WITH TROUBLESHOOTING

·

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

·

Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

·

After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".



PROCEDURE

1.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the I1 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the 4D, 4E and 4F driver side junction block assembly connectors.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I1-16 (ACCD) - 4E-30 Always Below 1 Ω
4F-3 - Body ground Always Below 1 Ω
I1-16 (ACCD) or 4E-30 - Other terminals and body ground Always 10 kΩ or higher



d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4D-1 - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

2.CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY)
a.

Remove the driver side junction block assembly.

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


b.

Connect all of the driver side junction block assembly connectors.


c.

Connect the I1 certification ECU (smart key ECU assembly) connector.


d.

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

B463118C39
2.26,2.333 2.573,2.542 0.313,0.208 0.083,0.125 0.396,0.281 0.313,0.156 10 false *a 2.333,2.354 2.646,2.51 0.313,0.156 10 false 4A
*a Component with harness connected
(Driver Side Junction Block Assembly) 		- -


Standard Voltage:
Tester Connection Condition Specified Condition
4A-26 - Body ground Engine switch on (ACC) 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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


3.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
a.
B511269C11
1.573,0.094 1.99,0.344 0.417,0.25 1.094,1.938 1.281,1.938 1.281,1.938 1.281,0.99 true 0.094,0.063 0.406,0.219 0.313,0.156 10 false *a 1.729,0.135 2.042,0.292 0.313,0.156 10 false I1 0.688,1.854 1.406,2.052 0.719,0.198 10 false ACCD
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))


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

Standard Voltage:
Tester Connection Condition Specified Condition
I1-16 (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

END (TEMPORARY CONNECTION FAILURE IS SUSPECTED)

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


NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)