RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0397001 ENTRY AND START SYSTEM(for Start Function) C

THEFT DETERRENT / KEYLESS ENTRY  ENTRY AND START SYSTEM(for Start Function)  B228B  System Voltage or GND Energization Malfunction  


DESCRIPTION

This DTC is stored when there is a malfunction in the certification ECU (smart key ECU assembly) battery power supply circuit or ground circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B228B System Voltage or GND Energization Malfunction A malfunction is detected in the certification ECU (smart key ECU assembly) battery power supply circuit or ground circuit. (1-trip detection logic*)
·

SMART fuse

·

Harness or connector

·

Certification ECU (smart key ECU assembly)


DTC Output Confirmation Operation:

Drive the vehicle.



*: 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
The engine stopped while driving. -

Related Data List and Active Test Items
DTC No. Data List and Active Test
B228B -

WIRING DIAGRAM

B424433E28
2.531,0.531 3.49,1.125 0.958,0.594 10 false from Battery 4.271,0.688 4.885,0.885 0.615,0.198 10 false SMART 5.323,0.448 5.938,0.646 0.615,0.198 10 false 4 5.531,0.552 6.146,0.75 0.615,0.198 10 false +B 5.542,1.406 6.156,1.604 0.615,0.198 10 false E 5.26,1.292 5.875,1.49 0.615,0.198 10 false 18 5.208,1.906 5.823,2.104 0.615,0.198 10 false N156 5.198,2.052 6.719,2.51 1.521,0.458 10 false Certification ECU (Smart Key ECU 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. 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 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 entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

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

·

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

·

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 SUPPLY)
a.
B519425C11
1.448,2.427 1.865,2.677 0.417,0.25 2.521,4.385 2.271,4.385 2.271,4.385 2.271,3.552 true 0.406,3.031 0.719,3.188 0.313,0.156 10 false *a 1.521,2.469 1.875,2.708 0.354,0.24 10 false N156 2.563,4.302 2.885,4.531 0.323,0.229 10 false +B
*a Front view of wire harness connector
(to Certification ECU (Smart Key ECU Assembly))


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


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N156-4 (+B) - Body ground Always 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - BODY GROUND)

NG

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

2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - BODY GROUND)
a.
B519425C12
1.438,2.427 1.875,2.677 0.438,0.25 0.74,4.198 0.906,4.198 0.906,4.198 1.156,3.781 true 0.615,4.125 0.771,4.323 0.156,0.198 10 false E 1.5,2.469 2.188,2.688 0.688,0.219 10 false N156 0.396,2.875 0.708,3.073 0.313,0.198 10 false *a
*a Front 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
N156-18 (E) - Body ground Always Below 1 Ω



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

REPAIR OR REPLACE HARNESS OR CONNECTOR