RM38N0EC _58 Vehicle Interior _111838 SUPPLEMENTAL RESTRAINT SYSTEMS _0499714 AIRBAG SYSTEM C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM  B000412  Driver Knee Bolster Deployment Control Circuit Short to Battery  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate DTC Output from Priority Test Mode / Check Mode
B000412 Driver Knee Bolster Deployment Control Circuit Short to Battery
·

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

·

Lower No. 1 instrument panel airbag assembly malfunction

·

Airbag sensor assembly malfunction


·

Harness or connector

·

Lower No. 1 instrument panel airbag assembly

·

Airbag sensor assembly


Comes on SRS Airbag A Applies to check mode

WIRING DIAGRAM

B585853E01
4.896,3.083 7.146,3.49 2.25,0.406 10 false Airbag Sensor Assembly 4.885,2.917 6.552,3.438 1.667,0.521 10 false E64 4.708,1.333 5.51,1.979 0.802,0.646 10 false 13 4.719,1.896 5.521,2.542 0.802,0.646 10 false 12 4.958,1.333 5.76,1.979 0.802,0.646 10 false DK+ 4.958,1.896 5.76,2.542 0.802,0.646 10 false DK- 0.875,2.406 2.542,2.927 1.667,0.521 10 false E70 0.875,2.563 2.74,2.948 1.865,0.385 10 false Lower No. 1 Instrument Panel Airbag Assembly 2.083,1.333 2.885,1.979 0.802,0.646 10 false 1 2.083,1.885 2.885,2.531 0.802,0.646 10 false 2 1.719,1.333 2.521,1.979 0.802,0.646 10 false DK+ 1.729,1.885 2.531,2.531 0.802,0.646 10 false DK-

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.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

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 sensor assembly, refer to work procedure.

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.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>CHECK MODE PROCEDURE

·

Perform the simulation method while checking the Data List.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>DATA LIST / ACTIVE TEST



PROCEDURE

1.CLEAR DTC

Pre-procedure1

a.

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


Procedure1

b.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444
Result:
Proceed to
NEXT



Post-procedure1

c.

Turn the ignition switch off.



NEXT

2.CHECK DTC
2.CHECK DTC

Pre-procedure1

a.

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


Procedure1

b.

Check for DTCs.

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



Post-procedure1

c.

None



A

3.CHECK CONNECTION OF CONNECTORS

B

USE SIMULATION METHOD TO CHECK

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


3.CHECK CONNECTION OF CONNECTORS

Pre-procedure1

a.

Turn the ignition switch off.


b.

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


Procedure1

c.

Check that the connectors are properly connected to the lower No. 1 instrument panel airbag assembly and airbag sensor assembly.

OK:

The connectors are properly connected.


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

4.CHECK CONNECTORS

NG

CONNECT CONNECTORS PROPERLY

4.CHECK CONNECTORS

Pre-procedure1

a.
C208251C38
0.688,1.229 1,1.385 0.313,0.156 10 false *1 2.208,1.635 2.521,1.865 0.313,0.229 10 false *2 1.271,1.229 1.583,1.385 0.313,0.156 10 false *3
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag Sensor Assembly
*3 Wire Harness


Disconnect the airbag sensor assembly connector.


b.

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


Procedure1

c.

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

OK:

The terminals 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 mechanism of the wire harness connector are not deformed or damaged.

OK:

The short springs are not deformed or damaged.


Result:
Proceed to
OK
NG



Post-procedure1

f.

None



OK

5.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CLEAR DTC

Pre-procedure1

a.
C415634C05
0.667,2.094 1.073,2.354 0.406,0.26 2.417,2.417 2.24,2.417 2.24,2.417 2.063,2.24 true 0.958,0.865 1.271,1.021 0.313,0.156 10 false *1 2.385,1.198 2.698,1.354 0.313,0.156 10 false *2 2.458,2.354 2.771,2.51 0.313,0.156 10 false *4 0.604,1.51 0.917,1.667 0.313,0.156 10 false *a 0.76,2.156 1.406,2.615 0.646,0.458 10 false E70 2,0.635 2.313,0.792 0.313,0.156 10 false A 1.833,0.635 2.146,0.792 0.313,0.156 10 false B 1.417,0.635 1.729,0.792 0.313,0.156 10 false C 1.115,0.635 1.427,0.792 0.313,0.156 10 false D 1.604,0.823 1.917,0.979 0.313,0.156 10 false *3
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag Sensor Assembly
*3 Wire Harness
*4 SST
*a Front view of wire harness connector
(to Lower No. 1 Instrument Panel Airbag Assembly)


Connect the airbag sensor assembly connector.


b.

Connect SST (resistance: 2.1 Ω) to connector C.

CAUTION:

Never connect the 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 SST.

·

Insert SST straight into the terminals of the connector.




SST
09843-18061  

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.


Procedure1

e.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444
Result:
Proceed to
NEXT



Post-procedure1

f.

Turn the ignition switch off.



NEXT

6.CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY
6.CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

Pre-procedure1

a.

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


Procedure1

b.

Check for DTCs.

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


HINT:

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



Post-procedure1

c.

Turn the ignition switch off.


d.

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


e.

Disconnect SST from connector C.



A

REPLACE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

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


B

7.CHECK HARNESS AND CONNECTOR
7.CHECK HARNESS AND CONNECTOR

Pre-procedure1

a.

Disconnect the airbag sensor 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.


Procedure1

d.
E439474C03
0.646,2 1.052,2.26 0.406,0.26 0.99,2.469 1.104,2.469 1.104,2.469 1.479,2.073 true 2.24,2.458 2.083,2.458 2.083,2.458 1.698,2.073 true 0.802,0.854 1.115,1.01 0.313,0.156 10 false *1 2.396,1.198 2.708,1.354 0.313,0.156 10 false *2 1.49,0.823 1.802,0.979 0.313,0.156 10 false *3 0.49,1.479 0.802,1.635 0.313,0.156 10 false *a 1,0.635 1.167,0.833 0.167,0.198 10 false D 1.302,0.635 1.448,0.823 0.146,0.188 10 false C 1.729,0.635 1.875,0.823 0.146,0.188 10 false B 2,0.635 2.146,0.823 0.146,0.188 10 false A 0.719,2.406 1.188,2.604 0.469,0.198 10 false DK+ 2.292,2.396 2.76,2.594 0.469,0.198 10 false DK- 0.75,2.063 1.094,2.229 0.344,0.167 10 false E70
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag Sensor Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Lower No. 1 Instrument Panel Airbag Assembly)


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

Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(E70)Location & Routing

Click Connector(E70)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Driver Side Knee Airbag Squib (Lower No. 1 Instrument Panel Airbag Assembly)

E70-1 (DK+) - Body ground Ignition switch ON Below 1 V
E70-2 (DK-) - Body ground Ignition switch ON Below 1 V


Result:
Proceed to
OK
NG



Post-procedure1

e.

Turn the ignition switch off.


f.

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



OK

8.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CLEAR DTC

Pre-procedure1

a.
C238245C41
0.75,1.208 1.313,1.635 0.563,0.427 10 false *1 2.156,1.573 2.49,1.979 0.333,0.406 10 false *2 1.323,1.198 1.885,1.625 0.563,0.427 10 false *3
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag Sensor Assembly
*3 Wire Harness


Connect the airbag sensor 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.


Procedure1

e.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444
Result:
Proceed to
NEXT



Post-procedure1

f.

Turn the ignition switch off.



NEXT

9.CHECK DTC
9.CHECK DTC

Pre-procedure1

a.

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


Procedure1

b.

Check for DTCs.

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


HINT:

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



Post-procedure1

c.

None



A

USE SIMULATION METHOD TO CHECK

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


B

REPLACE AIRBAG SENSOR ASSEMBLY

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