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

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM  B00301A  Second Row Left Side Airbag Deployment Control Circuit Resistance Below Threshold  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B00301A Second Row Left Side Airbag Deployment Control Circuit Resistance Below Threshold One of the following conditions is met:
·

The airbag ECU assembly detects a line short in the rear side squib LH circuit for 2 seconds during the primary check.

·

Rear side squib LH (rear seat airbag assembly LH) malfunction

·

Airbag ECU assembly malfunction


·

Harness or connector

·

Rear side squib LH (Rear seat airbag assembly LH)

·

Airbag ECU assembly


Comes on Applies to check mode

DTC Detection Conditions:
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition During the primary check ○ ○ ○
Malfunction Status The airbag ECU assembly detects a line short in the rear side squib LH circuit ○ - -
Rear side squib LH (rear seat airbag assembly LH) malfunction - ○ -
Airbag ECU assembly malfunction - - ○
Detection Time 2 seconds 2 seconds 2 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

C442199E27
4.885,3.083 6.698,3.521 1.813,0.438 10 false Airbag ECU Assembly 4.885,2.917 6.552,3.438 1.667,0.521 10 false O1 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 14 4.958,1.323 5.76,1.969 0.802,0.646 10 false SRL+ 4.958,1.896 5.76,2.542 0.802,0.646 10 false SRL- 0.833,2.396 2.156,2.583 1.323,0.188 10 false O198 0.833,2.573 2.792,3.333 1.958,0.76 10 false Rear Side Squib LH (Rear Seat Airbag Assembly LH) 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 1.615,1.313 2.229,1.51 0.615,0.198 10 false SRL+ 1.625,1.865 2.24,2.063 0.615,0.198 10 false SRL-

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 B00301A is output A
Current B00301A 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 rear 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.

Disconnect the connectors from the rear seat airbag assembly LH and airbag ECU assembly.


b.
C208249C45
0.583,0.281 0.75,0.281 0.75,0.281 0.75,0.698 false 1.167,0.292 1.333,0.292 1.333,0.292 1.333,0.708 false 2.229,1.031 2.531,1.469 0.302,0.438 10 false *2 0.396,0.188 0.844,0.521 0.448,0.333 10 false *1 0.99,0.188 1.292,0.375 0.302,0.188 10 false *3
*1 Rear Seat Airbag Assembly LH
*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.



Result:
Proceed to
OK
NG



OK

4.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CLEAR DTC
a.
C465714C03
0.344,2.146 0.813,2.406 0.469,0.26 0.656,1.021 0.656,0.677 false 1.771,2.323 1.948,2.552 true 1.448,1 1.448,0.667 false 0.573,1.042 0.885,1.302 0.313,0.26 10 false *1 2.25,0.792 2.625,1.115 0.375,0.323 10 false *2 0.313,1.719 0.646,2.135 0.333,0.417 10 false *a 1.896,2.583 2.26,2.844 0.365,0.26 10 false SST 0.396,2.188 0.771,2.406 0.375,0.219 10 false O198 1.813,0.531 1.958,0.781 0.146,0.25 10 false A 1.646,0.531 1.792,0.698 0.146,0.167 10 false B 1.146,0.531 1.292,0.698 0.146,0.167 10 false C 0.781,0.531 0.969,0.698 0.188,0.167 10 false D 1.375,1.083 1.667,1.354 0.292,0.271 10 false *3
*1 Rear Seat Airbag Assembly LH
*2 Airbag ECU Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Rear Seat Airbag Assembly LH)


Connect the connector to the airbag ECU assembly.


b.

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

CAUTION:

Never connect a tester to the rear seat airbag assembly LH 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 REAR SEAT AIRBAG ASSEMBLY LH
5.CHECK REAR SEAT AIRBAG ASSEMBLY LH
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
B00301A is not output A
B00301A is output B


HINT:

Codes other than DTC B00301A 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 REAR SEAT AIRBAG ASSEMBLY LH

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>REAR SEAT SIDE AIRBAG ASSEMBLY>REMOVAL


B

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

Disconnect the connector from the airbag ECU assembly.


b.
C238360C61
0.375,2.25 0.833,2.49 0.458,0.24 0.563,0.688 0.563,1.135 false 1.375,0.688 1.375,1.135 false 1.021,2.708 1.344,2.354 true 1.823,2.677 1.542,2.344 true 0.677,0.531 0.896,0.76 0.219,0.229 10 false D 1.063,0.531 1.354,0.813 0.292,0.281 10 false C 1.573,0.542 1.854,0.927 0.281,0.385 10 false B 1.948,0.542 2.177,0.875 0.229,0.333 10 false A 2.406,0.875 2.75,1.25 0.344,0.375 10 false *2 0.5,1.167 0.833,1.406 0.333,0.24 10 false *1 0.313,1.833 0.604,2.125 0.292,0.292 10 false *a 0.417,2.292 0.771,2.49 0.354,0.198 10 false O198 1.302,1.177 1.604,1.417 0.302,0.24 10 false *3 0.771,2.74 1.385,2.938 0.615,0.198 10 false SRL+ 1.781,2.729 2.396,2.927 0.615,0.198 10 false SRL-
*1 Rear Seat Airbag Assembly LH
*2 Airbag ECU Assembly
*3 Wire Harness
*a Front view of wire harness connector
(to Rear Seat Airbag Assembly LH)


Check for a short in the circuit.

i.

Release the activation prevention mechanism built into connector B.

HINT:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>SYSTEM DESCRIPTION



ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
O198-1 (SRL+) - O198-2 (SRL-) Always 1 MΩ or higher


Result:
Proceed to
OK
NG



iii.

Restore the released activation prevention mechanism of connector B to the original condition.




OK

7.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CLEAR DTC
a.
C238353C01
0.802,0.833 0.802,1.156 false 0.938,0.708 1.542,1.438 0.604,0.729 10 false D 1.083,0.708 1.49,1.177 0.406,0.469 10 false C 1.594,0.708 1.885,1.094 0.292,0.385 10 false B 1.75,0.708 2.073,1 0.323,0.292 10 false A 2.188,1.021 2.49,1.354 0.302,0.333 10 false *2 0.74,1.167 1.115,1.521 0.375,0.354 10 false *1
*1 Rear Seat Airbag Assembly LH
*2 Airbag ECU Assembly


Connect the connectors to the rear seat airbag assembly LH 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
B00301A is not output A
B00301A is output B


HINT:

Codes other than DTC B00301A 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