RM36D0EC _58 Vehicle Interior _083100 SUPPLEMENTAL RESTRAINT SYSTEMS _0694957 AIRBAG SYSTEM(for SFTM Made) C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for SFTM Made)  B000412  Driver Knee Bolster Deployment Control Circuit Short to Battery  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B000412 Driver Knee Bolster Deployment Control Circuit Short to Battery One of the following conditions is met:
·

The airbag ECU assembly detects a short circuit to B+ in the driver side knee squib circuit for 0.5 seconds.

·

A lower No. 1 instrument panel airbag assembly malfunction.

·

An airbag ECU assembly malfunction.


·

Wire harness

·

Lower No. 1 instrument panel airbag assembly

·

Airbag ECU assembly


Comes on Applicable

WIRING DIAGRAM

E511511E01
0.49,1.698 0.948,1.896 0.458,0.198 10 false G107 0.49,1.875 2.375,2.25 1.885,0.375 10 false Lower No. 1 Instrument Panel Airbag Assembly 1.302,1.115 1.615,1.313 0.313,0.198 10 false DK- 1.323,0.333 1.646,0.531 0.323,0.198 10 false DK+ 1.698,0.313 1.844,0.49 0.146,0.177 10 false 1 1.688,1.115 1.833,1.292 0.146,0.177 10 false 2 5.302,0.344 5.51,0.521 0.208,0.177 10 false 13 5.302,1.115 5.49,1.292 0.188,0.177 10 false 12 5.594,0.448 5.958,0.646 0.365,0.198 10 false DK+ 5.594,1.229 5.958,1.427 0.365,0.198 10 false DK- 5.417,1.708 5.875,1.906 0.458,0.198 10 false G70 5.417,1.865 7.104,2.125 1.688,0.26 10 false Airbag ECU Assembly

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


·

After replacing the airbag ECU assembly, refer to initialization.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE



HINT:

To perform the simulation method, enter check mode (signal check) with the GTS (Vehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>CHECK MODE PROCEDURE), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (General>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING).


PROCEDURE

1.CHECK DTC
a.

Turn the ignition switch to ON, and wait for at least 60 seconds.


b.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444

Result:
Proceed to
DTC B000412 is output
Past DTC B000412 is output



DTC B000412 is output

2.CHECK CONNECTION OF CONNECTORS

Past DTC B000412 is output

USE SIMULATION METHOD TO CHECK

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

HINT:
·

To perform the simulation method, enter check mode (signal check) with the GTS.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>CHECK MODE PROCEDURE

·

Perform the simulation method while checking the Data List.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>DATA LIST / ACTIVE TEST




2.CHECK CONNECTION OF CONNECTORS
a.

Turn the ignition switch off.


b.

Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.


c.

Check that the connectors are properly connected to the front seat airbag assembly LH and airbag ECU assembly.

OK:

The connectors are properly connected.



Result:
Proceed to
OK
NG



OK

3.CHECK CONNECTORS

NG

CONNECT CONNECTORS PROPERLY

3.CHECK CONNECTORS
a.
C208251C26
0.688,0.781 1,0.938 0.313,0.156 10 false *1 2.146,1.646 2.458,1.875 0.313,0.229 10 false *2 1.229,0.781 1.542,0.938 0.313,0.156 10 false *3
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag ECU Assembly
*3 Wire Harness


Disconnect the airbag ECU assembly connector.


b.

Disconnect the lower No. 1 instrument panel airbag assembly connector.


c.

Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals of the connectors are not deformed or damaged.



d.

Check that the connectors are not loose, deformed or damaged.

OK:

The connector locking button is not disengaged, and the claw of the lock is not deformed or damaged.



e.

Check that the short springs of the activation prevention mechanisms of the wire harness connector are not deformed or damaged.

OK:

The short springs are not deformed or damaged.



Result:
Proceed to
OK
NG



OK

4.CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY
a.
C415634C06
0.583,2.135 1.094,2.396 0.51,0.26 2.417,2.469 2.24,2.469 2.24,2.469 2.063,2.292 true 0.958,0.865 1.271,1.021 0.313,0.156 10 false *1 2.49,1.188 2.802,1.344 0.313,0.156 10 false *2 2.5,2.385 2.813,2.542 0.313,0.156 10 false *4 0.646,1.51 0.958,1.667 0.313,0.156 10 false *a 0.677,2.198 1.323,2.656 0.646,0.458 10 false G107 2.01,0.625 2.323,0.781 0.313,0.156 10 false A 1.844,0.635 2.156,0.792 0.313,0.156 10 false B 1.427,0.625 1.74,0.781 0.313,0.156 10 false C 1.125,0.635 1.438,0.792 0.313,0.156 10 false D 1.625,0.865 1.938,1.021 0.313,0.156 10 false *3
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag ECU Assembly
*3 Wire Harness
*4 SST
*a Front view of wire harness connector
(to Lower No. 1 Instrument Panel Airbag Assembly)


Connect the connector to the airbag ECU assembly.


b.

Connect the white wire side of SST (resistance 2.1 Ω) to connector C.

CAUTION:

Never connect a tester to the lower No. 1 instrument panel airbag assembly for measurement, as this may lead to a serious injury due to airbag deployment.


NOTICE:
·

Do not forcibly insert SST into the terminals of the connector when connecting it.

·

Insert SST straight into the terminals of the connector.




SST
09843-18061  

c.

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


d.

Turn the ignition switch to ON, and wait for at least 60 seconds.


e.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

f.

Turn the ignition switch off.


g.

Turn the ignition switch to ON, and wait for at least 60 seconds.


h.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444
Result:
Proceed to
B000412 is not output
B000412 is output


HINT:

Codes other than DTC B000412 may be output at this time, but they are not related to this check.



i.

Turn the ignition switch off.


j.

Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.


k.

Disconnect SST from connector C.



B000412 is not output

REPLACE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>KNEE AIRBAG ASSEMBLY>REMOVAL


B000412 is output

5.CHECK HARNESS AND CONNECTOR
5.CHECK HARNESS AND CONNECTOR
a.
E439474C01
0.646,2 1.052,2.26 0.406,0.26 0.979,2.469 1.094,2.469 1.094,2.469 1.469,2.073 true 2.24,2.458 2.083,2.458 2.083,2.458 1.698,2.073 true 0.823,0.438 1.135,0.594 0.313,0.156 10 false *1 2.375,1.208 2.688,1.365 0.313,0.156 10 false *2 1.5,0.448 1.813,0.604 0.313,0.156 10 false *3 0.573,1.531 0.885,1.688 0.313,0.156 10 false *a 1,0.646 1.167,0.844 0.167,0.198 10 false D 1.302,0.635 1.448,0.823 0.146,0.188 10 false C 1.729,0.646 1.875,0.833 0.146,0.188 10 false B 2.01,0.635 2.156,0.823 0.146,0.188 10 false A 0.667,2.417 1.135,2.615 0.469,0.198 10 false DK+ 2.281,2.396 2.75,2.594 0.469,0.198 10 false DK- 0.698,2.073 1.042,2.24 0.344,0.167 10 false G107
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag ECU Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Lower No. 1 Instrument Panel Airbag Assembly)


Disconnect the G70 airbag ECU assembly connector.


b.

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


c.

Turn the ignition switch to ON.


d.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G107-1 (DK+) - Body ground Ignition switch ON Below 1 V
G107-2 (DK-) - Body ground Ignition switch ON Below 1 V



Result:
Proceed to
OK
NG


e.

Turn the ignition switch off.


f.

Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.



OK

6.CHECK DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK DTC
a.
C238245C39
0.75,1.26 1.313,1.688 0.563,0.427 10 false *1 2.49,1.604 2.823,2.01 0.333,0.406 10 false *2 1.344,0.792 1.906,1.219 0.563,0.427 10 false *3
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag ECU Assembly
*3 Wire Harness


Connect the airbag ECU assembly connector.


b.

Connect the lower No. 1 instrument panel airbag assembly connector.


c.

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


d.

Turn the ignition switch to ON, and wait for at least 60 seconds.


e.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

f.

Turn the ignition switch off.


g.

Turn the ignition switch to ON, and wait for at least 60 seconds.


h.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444
Result:
Proceed to
B000412 is not output
B000412 is output


HINT:

Codes other than DTC B000412 may be output at this time, but they are not related to this check.



i.

Turn the ignition switch off.


j.

Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.



B000412 is not output

USE SIMULATION METHOD TO CHECK

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

HINT:
·

To perform the simulation method, enter check mode (signal check) with the GTS.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>CHECK MODE PROCEDURE

·

Perform the simulation method while checking the Data List.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>DATA LIST / ACTIVE TEST




B000412 is output

REPLACE AIRBAG ECU ASSEMBLY

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