RM38N0EC _58 Vehicle Interior _111832 THEFT DETERRENT / KEYLESS ENTRY _0509385 SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model) C

THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model)  B227411  ACC Circuit Short to Ground  


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
B227411 ACC Circuit Short to Ground 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.


·

Power distribution box assembly

·

Certification ECU (smart key ECU assembly)

·

Wire harness or connector


DTC Output Confirmation Operation:

Wait 10 seconds after turning the ignition switch to ACC or ON, and then wait another 10 seconds after turning the ignition 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 ignition 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 ignition switch is ACC.


HINT:

The ignition switch can be turned to ON and the engine can be started.


-

Related Data List and Active Test Items
DTC No. Data List and Active Test
B227411
Power Source Control
·

ACC Relay Monitor



WIRING DIAGRAM

B586656E09
1.813,0.75 3.51,1.073 1.698,0.323 10 false from Auxiliary Battery 2.521,2.677 3.073,2.906 0.552,0.229 10 false ACC 1.5,2.031 2.313,2.26 0.813,0.229 10 false ECU-ACC 0.958,1.646 1.302,1.885 0.344,0.24 10 false 12 0.958,2.177 1.302,2.417 0.344,0.24 10 false 36 3.99,1.635 4.333,1.875 0.344,0.24 10 false 1 3.958,2.156 4.302,2.396 0.344,0.24 10 false 39 0.948,1.875 1.292,2.115 0.344,0.24 10 false 4B 0.948,2.406 1.292,2.646 0.344,0.24 10 false 4B 3.958,2.406 4.302,2.646 0.344,0.24 10 false 4B 3.969,1.875 4.313,2.115 0.344,0.24 10 false 4F 5.135,3.583 5.479,3.823 0.344,0.24 10 false E52 5.125,3.75 6.656,4.448 1.531,0.698 10 false Certification ECU (Smart Key ECU Assembly) 4.99,2.292 5.333,2.531 0.344,0.24 10 false 21 5.26,2.281 5.813,2.51 0.552,0.229 10 false ACCD 5.76,1.875 6.104,2.115 0.344,0.24 10 false +B 6.229,2.271 6.573,2.51 0.344,0.24 10 false IC 1.542,3.396 4.771,3.917 3.229,0.521 10 false Power Distribution Box Assembly

CAUTION / NOTICE / HINT

NOTICE:
·

When using the GTS with the ignition switch off, perform lock and unlock operations using the door control switch of the multiplex network master switch assembly at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins, and then select the vehicle model manually.

Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start (CAN). While using the GTS, periodically perform lock and unlock operations using the door control switch of the multiplex network master switch assembly 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)>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) - POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)

Pre-procedure1

a.

Disconnect the E52 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the 4B power distribution box assembly connector.


Procedure1

c.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(E52)Location & Routing

Click Connector(E52)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Smart Key ECU Assembly

E52-21 (ACCD) - 4B-39 Always Below 1 Ω
4B-36 - Body ground Always Below 1 Ω
E52-21 (ACCD) or 4B-39 - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

2.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
a.
B574624C44
1.625,0.052 1.979,0.24 0.354,0.188 2.667,1.917 2.479,1.917 2.479,1.917 2.396,0.938 true 0.177,0.073 0.49,0.271 0.313,0.198 10 false *a 1.677,0.063 1.99,0.26 0.313,0.198 10 false E52 2.719,1.854 3.333,2.052 0.615,0.198 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

Click Location & Routing(E52)Location & Routing

Click Connector(E52)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Smart Key ECU Assembly

E52-21 (ACCD) - Body ground Ignition switch off 1 V or less
E52-21 (ACCD) - Body ground Ignition switch ACC 8.5 V or higher


Result:
Proceed to
OK
NG




OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)