RM38T0EC _58 Vehicle Interior _115188 SUPPLEMENTAL RESTRAINT SYSTEMS _0511913 AIRBAG SYSTEM C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM  B000411  Driver Knee Bolster Deployment Control Circuit Short to Ground  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B000411 Driver Knee Bolster Deployment Control Circuit Short to Ground One of the following conditions is met:
·

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

·

Driver side knee airbag squib (lower No. 1 instrument panel airbag assembly) malfunction

·

Airbag ECU assembly malfunction


·

Harness or connector

·

Driver side knee airbag squib (Lower No. 1 instrument panel airbag assembly)

·

Airbag ECU assembly


Comes on Applies to check mode

DTC Detection Conditions:
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition Ignition switch ON ○ ○ ○
Malfunction Status The airbag ECU assembly detects a short to ground in the driver side knee airbag squib circuit ○ - -
Driver side knee airbag squib (lower No. 1 instrument panel airbag assembly) malfunction - ○ -
Airbag ECU assembly malfunction - - ○
Detection Time 0.5 seconds 0.5 seconds 0.5 seconds
Number of Trips 1 trip 1 trip 1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.


WIRING DIAGRAM

C465709E03
4.885,3.146 6.344,3.354 1.458,0.208 10 false Airbag ECU Assembly 4.927,2.958 5.385,3.156 0.458,0.198 10 false I47 0.51,2.448 1.125,2.646 0.615,0.198 10 false I224 0.5,2.635 3.177,3.177 2.677,0.542 10 false Driver Side Knee Airbag Squib (Lower No. 1 Instrument Panel Airbag Assembly) 4.948,1.302 5.406,1.5 0.458,0.198 10 false DK+ 4.958,1.875 5.417,2.073 0.458,0.198 10 false DK- 1.688,1.344 2.146,1.542 0.458,0.198 10 false DK+ 1.698,1.896 2.156,2.094 0.458,0.198 10 false DK- 4.635,1.323 4.948,1.521 0.313,0.198 10 false 13 4.646,1.896 4.958,2.094 0.313,0.198 10 false 12 2.094,1.323 2.281,1.583 0.188,0.26 10 false 1 2.094,1.885 2.25,2.083 0.156,0.198 10 false 2

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

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




HINT:
·

To perform the simulation method, select Check Mode 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.CHECK CURRENT 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:
Result Proceed to
Current B000411 is output A
Current B000411 is not output B



A

2.CHECK CONNECTION OF CONNECTORS

B

USE SIMULATION METHOD TO CHECK

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

HINT:
·

Perform the simulation method by selecting Check Mode using 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




2.CHECK CONNECTION OF CONNECTORS
a.

Turn the ignition switch off.


b.

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.



c.

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

Disconnect the connectors from the lower No. 1 instrument panel airbag assembly and airbag ECU assembly.


b.
C208251C39
0.75,1.167 0.75,1.583 false 1.083,0.583 1.333,0.583 1.333,0.583 1.333,1.01 false 2.198,1 2.583,1.25 0.385,0.25 10 false *2 0.677,1.615 1.167,1.833 0.49,0.219 10 false *1 0.896,0.5 1.146,0.75 0.25,0.25 10 false *3
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag ECU Assembly
*3 Wire Harness


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

OK:

The terminals of the connectors are not deformed or damaged.



c.

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.



d.

Check that the wire harness connector (on the lower No. 1 instrument panel airbag assembly side) is not loose, deformed or damaged.

OK:

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



Result:
Proceed to
OK
NG



OK

4.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CLEAR DTC
a.
C247056C35
0.448,2.24 0.833,2.479 0.385,0.24 0.667,0.906 0.667,1.302 false 1.844,2.26 2.021,2.26 false 1.5,0.917 1.5,1.313 false 0.594,1.313 0.938,1.656 0.344,0.344 10 false *1 2.25,0.75 2.573,1.115 0.323,0.365 10 false *2 1.813,0.76 2.083,1.094 0.271,0.333 10 false A 1.656,0.76 1.979,1.198 0.323,0.438 10 false B 1.146,0.76 1.385,1.156 0.24,0.396 10 false C 0.781,0.76 1.063,1.188 0.281,0.427 10 false D 0.521,2.271 0.885,2.573 0.365,0.302 10 false I224 2.063,2.177 2.542,2.552 0.479,0.375 10 false SST 0.313,1.698 0.625,2.146 0.313,0.448 10 false *a 1.438,1.323 1.75,1.583 0.313,0.26 10 false *3
*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)


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.


Result:
Proceed to
NEXT



NEXT

5.CHECK INSTRUMENT PANEL AIR BAG ASSEMBLY LOWER NO.1
5.CHECK INSTRUMENT PANEL AIR BAG ASSEMBLY LOWER NO.1
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:
Result Proceed to
B000411 is not output A
B000411 is output B


HINT:

Codes other than DTC B000411 may be output at this time, but they are not related to this check.



c.

Turn the ignition switch off.


d.

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.



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

6.CHECK HARNESS AND CONNECTOR
6.CHECK HARNESS AND CONNECTOR
a.

Disconnect the connector from the airbag ECU assembly.


b.
C245639C33
0.51,2.219 0.875,2.458 0.365,0.24 1.469,2.323 1.073,2.563 true 1.698,2.323 2.042,2.563 true 0.51,0.875 0.51,0.458 0.51,0.458 0.375,0.458 false 1.354,0.875 1.354,0.458 1.354,0.458 1.219,0.458 false 0.635,0.865 1.135,1.208 0.5,0.344 10 false D 1.031,0.865 1.354,1.177 0.323,0.313 10 false C 1.594,0.875 1.927,1.167 0.333,0.292 10 false B 1.99,0.875 2.563,1.271 0.573,0.396 10 false A 2.406,0.875 2.74,1.135 0.333,0.26 10 false *2 0.938,2.573 1.396,2.875 0.458,0.302 10 false DK+ 0.573,2.26 0.875,2.458 0.302,0.198 10 false I224 2,2.573 2.635,2.885 0.635,0.313 10 false DK- 0.302,1.875 0.604,2.177 0.302,0.302 10 false *a 0.219,0.385 0.688,0.698 0.469,0.313 10 false *1 1.073,0.385 1.552,0.708 0.479,0.323 10 false *3
*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)


Check for a short to ground in the circuit.

i.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I224-1 (DK+) - Body ground Always 1 MΩ or higher
I224-2 (DK-) - Body ground Always 1 MΩ or higher




Result:
Proceed to
OK
NG



OK

7.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CLEAR DTC
a.
C238245C01
0.844,1.146 0.844,1.458 false 0.969,1 1.219,1.385 0.25,0.385 10 false D 1.125,1 1.333,1.417 0.208,0.417 10 false C 1.583,1 1.823,1.354 0.24,0.354 10 false B 1.74,1 2,1.323 0.26,0.323 10 false A 2.167,0.99 2.458,1.313 0.292,0.323 10 false *2 0.76,1.479 1.083,1.781 0.323,0.302 10 false *1
*1 Lower No. 1 Instrument Panel Airbag Assembly
*2 Airbag ECU Assembly


Connect the connectors to the lower No. 1 instrument panel airbag assembly and airbag ECU assembly.


b.

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


c.

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


d.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

e.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

8.CHECK DTC
8.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:
Result Proceed to
B000411 is not output A
B000411 is output B


HINT:

Codes other than DTC B000411 may be output at this time, but they are not related to this check.



A

USE SIMULATION METHOD TO CHECK

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

HINT:
·

Perform the simulation method by selecting Check Mode using 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




B

REPLACE AIRBAG ECU ASSEMBLY

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