RM38N0EC _58 Vehicle Interior _111830 DOOR LOCK _0505351 POWER DOOR LOCK CONTROL SYSTEM C

DOOR LOCK  POWER DOOR LOCK CONTROL SYSTEM  B124300  Impact Detection Sensor Circuit Malfunction  


DESCRIPTION

If the collision door lock release function does not operate normally, or an open or short in the GSW input circuit of the main body ECU (multiplex network body ECU) is detected, DTC B124300 will be stored.

HINT:

If DTC B124300 is stored, the automatic door lock function, and collision door lock release function will be prohibited.


DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
B124300 Impact Detection Sensor Circuit Malfunction A malfunction occurs in the GSW input circuit of the main body ECU (multiplex network body ECU).
·

Main body ECU (multiplex network body ECU)

·

Power distribution box assembly

·

Airbag sensor assembly

·

Wire harness or connector


Main Body A

WIRING DIAGRAM

B581847E02
1.25,0.938 1.708,1.135 0.458,0.198 10 false GSW 5.406,0.833 5.719,1.031 0.313,0.198 10 false 20 0.573,1.813 1.031,2.01 0.458,0.198 10 false E64 0.573,1.969 2.313,2.354 1.74,0.385 10 false Airbag Sensor Assembly 5.646,0.938 6.104,1.135 0.458,0.198 10 false GSW 4.354,0.823 4.667,1.021 0.313,0.198 10 false 43 1.667,0.833 1.979,1.031 0.313,0.198 10 false 25 4.052,1.281 4.365,1.479 0.313,0.198 10 false 4C 4.063,1.448 5.51,2.063 1.448,0.615 10 false Power Distribution Box Assembly 5.302,1.885 5.615,2.083 0.313,0.198 10 false MB 5.302,2.031 6.927,2.479 1.625,0.448 10 false Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

NOTICE:
·

When DTC B124300 is stored, operation of the speed-sensitive automatic door lock function, shift linked automatic door lock function and collision door lock release is prohibited.

·

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>PRECAUTION

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

·

The auxiliary battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

Click hereVehicle Interior>DOOR LOCK>POWER DOOR LOCK CONTROL SYSTEM>ON-VEHICLE INSPECTION

*: w/ Door Control Battery




PROCEDURE

1.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
50002 449

Result:
Proceed to
NEXT



NEXT

2.CHECK DTC OUTPUT
2.CHECK DTC OUTPUT
a.

Check for DTCs.

Body Electrical > Main Body > Trouble Codes
50001 449

Result:
Result Proceed to
B124300 is not output A
B124300 is output B



A

USE SIMULATION METHOD TO CHECK

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


B

3.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (GSW VOLTAGE)
3.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (GSW VOLTAGE)

Pre-procedure1

a.

Disconnect the cable from the negative (-) auxiliary battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.


NOTICE:

Turning the ignition switch to ON with the airbag sensor assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.



b.

Disconnect the E64 airbag sensor assembly connector.


c.

Connect the cable to the negative (-) auxiliary battery terminal.


Procedure1

d.
B508271C19
1.458,0.229 1.875,0.479 0.417,0.25 1.74,3.104 2.021,3.104 2.021,3.104 2.021,2.021 false 1.531,0.26 1.99,0.458 0.458,0.198 10 false E64 1.344,3.031 1.802,3.229 0.458,0.198 10 false GSW 0.188,0.188 0.646,0.385 0.458,0.198 10 false *a
*a Front view of wire harness connector
(to Airbag Sensor Assembly)


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

Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(E64)Location & Routing

Click Connector(E64)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Airbag Sensor Assembly

E64-25 (GSW) - Body ground Ignition switch ON 4.3 to 5.5 V


Result:
Proceed to
OK
NG



Post-procedure1

e.

None



OK

4.REPLACE AIRBAG SENSOR ASSEMBLY

NG

7.CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)
4.REPLACE AIRBAG SENSOR ASSEMBLY
a.

Disconnect the cable from the negative (-) auxiliary battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.



b.

Replace the airbag sensor assembly.

HINT:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>REMOVAL



Result:
Proceed to
NEXT



NEXT

5.CLEAR DTC
5.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
50002 449

Result:
Proceed to
NEXT



NEXT

6.CHECK DTC OUTPUT
6.CHECK DTC OUTPUT
a.

Check for DTCs.

Body Electrical > Main Body > Trouble Codes
50001 449

Result:
Result Proceed to
B124300 is not output A
B124300 is output B



A

END (AIRBAG SENSOR ASSEMBLY WAS DEFECTIVE)

B

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


7.CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

Pre-procedure1

a.

Disconnect the cable from the negative (-) auxiliary battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.



b.

Disconnect the 4C 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(E64)Location & Routing

Click Connector(E64)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Airbag Sensor Assembly

E64-25 (GSW) - 4C-43 Always Below 1 Ω
E64-25 (GSW) or 4C-43 - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

8.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

Pre-procedure1

a.

Remove the power distribution box assembly.

HINT:

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



b.

Remove the main body ECU (multiplex network body ECU).


Procedure1

c.

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

B581799C03
1.927,0.625 2.427,0.917 0.5,0.292 5.354,0.625 5.854,0.917 0.5,0.292 2.677,2.094 2.833,2.094 2.833,2.094 2.833,1.563 false 2.333,2.031 2.792,2.281 0.458,0.25 10 false GSW 5.521,0.698 5.76,0.896 0.24,0.198 10 false 4C 2.083,0.708 2.417,0.917 0.333,0.208 10 false MB 0.156,0.052 0.458,0.208 0.302,0.156 10 false *a
*a Component without harness connected
(Power Distribution Box Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
MB-20 (GSW) - 4C-43 Always Below 1 Ω


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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