RM36D0EC _58 Vehicle Interior _083092 DOOR LOCK _0403003 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.

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 ECU assembly

·

Harness or connector


Main Body A

WIRING DIAGRAM

E544600E01
1.427,1 1.885,1.198 0.458,0.198 10 false GSW 1.938,0.906 2.25,1.104 0.313,0.198 10 false 25 0.563,1.833 1.021,2.031 0.458,0.198 10 false G70 0.583,2.021 2.188,2.323 1.604,0.302 10 false Airbag ECU Assembly 5.302,1.01 5.76,1.208 0.458,0.198 10 false GSW 2.792,0.896 3.104,1.094 0.313,0.198 10 false 43 4.99,0.875 5.302,1.073 0.313,0.198 10 false 20 3.021,1.51 3.333,1.708 0.313,0.198 10 false 6C 3.042,1.698 5.135,1.938 2.094,0.24 10 false Power Distribution Box Assembly 5.083,2.021 5.396,2.219 0.313,0.198 10 false A 5.073,2.208 6.74,2.594 1.667,0.385 10 false Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

NOTICE:
·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the auxiliary battery

HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART


·

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin (w/ Smart Entry and Start System).

·

When DTC B124300 is output, the collision door lock release, shift-linked automatic door lock/unlock and speed-sensitive automatic door lock functions are prohibited.

·

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

-

for GTMC Made:Vehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for GTMC Made)>PRECAUTION

-

for SFTM Made:Vehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>PRECAUTION




PROCEDURE

1.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
50002 449

Result:
Proceed to
NEXT



NEXT

2.CHECK FOR DTC
2.CHECK FOR DTC
a.

Recheck 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)
3.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Pre-procedure1

a.

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

CAUTION:

Wait at least 60 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 ECU assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.



b.

Disconnect the airbag ECU assembly connector.

for GTMC Made:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for GTMC Made)>PRECAUTION

for SFTM Made:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>PRECAUTION


c.

Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.


Procedure1

d.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G70-25 (GSW) - Body ground Ignition switch ON 4.3 to 5.5 V



Result:
Proceed to
OK
NG


Post-procedure1

e.

None



OK

REPLACE AIRBAG ECU ASSEMBLY

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


NG

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - AIRBAG ECU ASSEMBLY)
4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - AIRBAG ECU ASSEMBLY)

Pre-procedure1

a.

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

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.



b.

Disconnect the 6C power distribution box assembly connector.


c.

Disconnect the G70 airbag ECU assembly connector.

for GTMC Made:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for GTMC Made)>PRECAUTION

for SFTM Made:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>PRECAUTION


Procedure1

d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
6C-43 - G70-25 (GSW) Always Below 1 Ω
6C-43 or G70-25 (GSW) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG


Post-procedure1

e.

None



OK

5.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPLACE HARNESS OR CONNECTOR

5.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

Pre-procedure1

a.

Remove the power distribution box assembly.

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


b.

Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

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


Procedure1

c.

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

E516730C10
1.313,0.313 1.813,0.563 0.5,0.25 4.729,0.51 5.229,0.76 0.5,0.25 5.708,1.583 5.563,1.583 5.563,1.583 5.479,1.24 true 1.479,0.354 1.792,0.552 0.313,0.198 10 false 6C 4.906,0.563 5.219,0.76 0.313,0.198 10 false A 5.792,1.479 6.323,1.667 0.531,0.188 10 false GSW 0.167,0.135 0.479,0.333 0.313,0.198 10 false *a
*a Component without harness connected
(Power Distribution Box Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
A-20 (GSW) - 6C-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