RM35X0E _58 Vehicle Interior _078336 DOOR LOCK _0379904 POWER DOOR LOCK CONTROL SYSTEM C

DOOR LOCK  POWER DOOR LOCK CONTROL SYSTEM  B1243  GSW Terminal 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 B1243 will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1243 GSW Terminal 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)

·

Instrument panel junction block assembly

·

Airbag ECU assembly

·

Harness or connector



WIRING DIAGRAM

B708938E01
1.25,0.938 1.708,1.135 0.458,0.198 10 false GSW 1.667,0.833 1.979,1.031 0.313,0.198 10 false 25 0.583,1.802 1.042,2 0.458,0.198 10 false N45 0.594,1.969 2.51,2.344 1.917,0.375 10 false Airbag ECU Assembly 5.646,0.938 6.104,1.135 0.458,0.198 10 false GSW 4.427,0.823 4.74,1.021 0.313,0.198 10 false 7 5.406,0.823 5.719,1.021 0.313,0.198 10 false 24 4.01,1.292 4.323,1.49 0.313,0.198 10 false 3A 4.01,1.438 5.563,1.813 1.552,0.375 10 false Instrument Panel Junction Block Assembly 5.344,1.802 5.656,2 0.313,0.198 10 false A 5.344,1.979 7,2.531 1.656,0.552 10 false Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

NOTICE:
·

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

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>PRECAUTION

·

If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.*

*: w/ Entry and Start System

·

When DTC B1243 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 Type A:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type A)>PRECAUTION

for Type C:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>PRECAUTION



PROCEDURE

1.CLEAR DTC
a.

Clear the DTCs.

Click hereVehicle Interior>DOOR LOCK>POWER DOOR LOCK CONTROL SYSTEM>DTC CHECK / CLEAR

Body Electrical > Main Body > Clear DTCs
50002 123

Result:
Proceed to
NEXT



NEXT

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

Recheck for DTCs.

Click hereVehicle Interior>DOOR LOCK>POWER DOOR LOCK CONTROL SYSTEM>DTC CHECK / CLEAR

Body Electrical > Main Body > Trouble Codes
50001 123
OK:

DTC B1243 is not output.



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

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


NG

3.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
3.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
a.
B473154C11
1.406,0.135 1.885,0.406 0.479,0.271 1.927,1.25 2.396,0.667 2.396,0.667 2.51,0.667 false 1.531,0.177 1.844,0.375 0.313,0.198 10 false N45 2.583,0.625 3.021,0.823 0.438,0.198 10 false GSW 0.146,0.104 0.458,0.302 0.313,0.198 10 false *a
*a Front view of wire harness connector
(to Airbag ECU Assembly)


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

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) 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 Type A:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type A)>PRECAUTION

for Type C:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>PRECAUTION



c.

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


d.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N45-25 (GSW) - Body ground Ignition switch ON 4.3 to 5.5 V



Result:
Proceed to
OK
NG



OK

REPLACE AIRBAG ECU ASSEMBLY

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


NG

4.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - AIRBAG ECU ASSEMBLY)
4.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - AIRBAG ECU ASSEMBLY)
a.

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

CAUTION:

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



b.

Disconnect the 3A instrument panel junction block assembly connector.


c.

Disconnect the N45 airbag ECU assembly connector.

for Type A:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type A)>PRECAUTION

for Type C:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for Type C)>PRECAUTION



d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3A-7 - N45-25 (GSW) Always Below 1 Ω
3A-7 or N45-25 (GSW) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE HARNESS OR CONNECTOR

5.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
a.

Remove the instrument panel junction block assembly.

for LHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


b.

Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

for LHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


c.

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

B472615C09
1.771,0.625 2.271,0.917 0.5,0.292 5.354,0.625 5.854,0.917 0.5,0.292 2.375,2.125 2.51,2.125 2.51,2.125 2.969,1.573 false 5.51,0.688 5.75,0.885 0.24,0.198 10 false 3A 1.99,0.677 2.146,0.875 0.156,0.198 10 false A 2.01,2.042 2.469,2.292 0.458,0.25 10 false GSW 0.115,0.052 0.427,0.25 0.313,0.198 10 false *a
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
A-24 (GSW) - 3A-7 Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD:Power Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:Power Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL



NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

for LHD:Power Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:Power Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL