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

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM  B00011A  Driver Frontal Stage 1 Deployment Control Circuit Resistance Below Threshold  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B00011A Driver Frontal Stage 1 Deployment Control Circuit Resistance Below Threshold One of the following conditions is met:
·

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

·

Spiral cable sub-assembly malfunction

·

Driver side squib (horn button assembly) malfunction

·

Airbag ECU assembly malfunction


·

Harness or connector

·

Spiral cable sub-assembly

·

Driver side squib (Horn button assembly)

·

Airbag ECU assembly


Comes on Applies to check mode

DTC Detection Conditions:
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4
Diagnosis Condition During the primary check ○ ○ ○ ○
Malfunction Status The airbag ECU assembly detects a line short in the driver side squib circuit ○ - - -
Spiral cable sub-assembly malfunction - ○ - -
Driver side squib (horn button assembly) malfunction - - ○ -
Airbag ECU assembly malfunction - - - ○
Detection Time 2 seconds 2 seconds 2 seconds 2 seconds
Number of Trips 1 trip 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

B475053E98
4.948,1.344 5.333,1.625 0.385,0.281 10 false D+ 4.948,1.896 5.333,2.177 0.385,0.281 10 false D- 4.771,1.344 5.156,1.625 0.385,0.281 10 false 6 4.771,1.896 5.156,2.177 0.385,0.281 10 false 7 4.917,2.917 5.49,3.104 0.573,0.188 10 false I47 4.917,3.083 6.594,3.427 1.677,0.344 10 false Airbag ECU Assembly 3.208,1.438 3.719,1.74 0.51,0.302 10 false I22 3.208,1.99 3.719,2.292 0.51,0.302 10 false I22 3.302,1.229 3.813,1.531 0.51,0.302 10 false 1 3.302,1.781 3.813,2.083 0.51,0.302 10 false 2 2.396,2.406 4.146,2.833 1.75,0.427 10 false Spiral Cable Sub-assembly 2.917,1.344 3.302,1.625 0.385,0.281 10 false D+ 2.948,1.896 3.333,2.177 0.385,0.281 10 false D- 2.094,1.427 2.604,1.729 0.51,0.302 10 false z33 2.094,1.99 2.604,2.292 0.51,0.302 10 false z33 0.542,2.417 2.01,3.365 1.469,0.948 10 false Driver Side Squib (Horn Button Assembly) 2.177,1.229 2.688,1.531 0.51,0.302 10 false 2 2.177,1.781 2.688,2.083 0.51,0.302 10 false 1

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 B00011A is output A
Current B00011A 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 horn button assembly, spiral cable sub-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 horn button assembly, spiral cable sub-assembly and airbag ECU assembly.


b.
C371112C08
2.031,1.177 2.031,1.563 false 0.271,1.177 0.271,1.563 false 0.208,1.583 0.75,1.917 0.542,0.333 10 false *1 1.073,1.031 1.333,1.25 0.26,0.219 10 false *2 2.833,1.031 3.167,1.25 0.333,0.219 10 false *3 1.958,1.583 2.417,1.854 0.458,0.271 10 false *4
*1 Horn Button Assembly
*2 Spiral Cable Sub-assembly
*3 Airbag ECU Assembly
*4 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 mechanisms of the wire harness connector and spiral cable sub-assembly connector are not deformed or damaged.

OK:

The short springs are not deformed or damaged.



d.

Check that the spiral cable sub-assembly connector (on the horn button 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

REPLACE SPIRAL CABLE SUB-ASSEMBLY OR REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CLEAR DTC
a.
C348746C46
0.375,2.156 0.74,2.375 0.365,0.219 0.313,1.177 0.313,0.76 false 1.75,2.25 2,2.25 false 1.292,2.396 0.865,2.833 true 0.25,1.208 0.5,1.417 0.25,0.208 10 false *1 2.042,2.167 2.406,2.417 0.365,0.25 10 false SST 2.781,0.615 3.083,0.833 0.302,0.219 10 false *3 1.156,0.615 1.417,0.833 0.26,0.219 10 false *2 2.333,0.615 2.469,0.833 0.135,0.219 10 false A 2.177,0.615 2.313,0.833 0.135,0.219 10 false B 1.75,0.615 1.875,0.833 0.125,0.219 10 false C 1.594,0.615 1.729,0.833 0.135,0.219 10 false D 0.75,0.615 0.875,0.833 0.125,0.219 10 false E 0.438,0.615 0.583,0.833 0.146,0.219 10 false F 0.427,2.177 0.781,2.375 0.354,0.198 10 false z33 0.333,1.698 0.646,1.896 0.313,0.198 10 false *a 0.677,2.771 0.99,2.969 0.313,0.198 10 false *b
*1 Horn Button Assembly
*2 Spiral Cable Sub-assembly
*3 Airbag ECU Assembly
*a Front view of wire harness connector
(to Horn Button Assembly)
*b Color: Light Green


Connect the connectors to the airbag ECU assembly and spiral cable sub-assembly.


b.

Connect the white wire side of SST (resistance 2.1 Ω) to connector E (light green connector).

CAUTION:

Never connect a tester to the horn button 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 HORN BUTTON ASSEMBLY
5.CHECK HORN BUTTON ASSEMBLY
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
B00011A is not output A
B00011A is output B


HINT:

Codes other than DTC B00011A 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 E.



A

REPLACE HORN BUTTON ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>STEERING PAD>REMOVAL


B

6.CHECK DRIVER SIDE SQUIB CIRCUIT
6.CHECK DRIVER SIDE SQUIB CIRCUIT
a.

Disconnect the connector from the airbag ECU assembly.


b.
C348747C37
0.51,2.229 0.865,2.49 0.354,0.26 0.25,1.208 0.25,0.875 false 1.792,2.813 1.323,2.438 true 1.917,1.208 1.917,0.875 false 1.833,1.24 2.125,1.5 0.292,0.26 10 false *4 1.073,0.698 1.375,1.042 0.302,0.344 10 false *2 2.813,0.74 3.146,1.229 0.333,0.49 10 false *3 0.323,1.698 0.625,2.042 0.302,0.344 10 false *a 2.375,0.708 2.708,1.198 0.333,0.49 10 false A 2.052,0.708 2.385,1.198 0.333,0.49 10 false B 1.708,0.708 2.042,1.198 0.333,0.49 10 false C 1.542,0.708 1.698,1.188 0.156,0.479 10 false D 0.698,0.719 0.865,1 0.167,0.281 10 false E 0.375,0.719 0.573,1.063 0.198,0.344 10 false F 0.563,2.271 0.854,2.51 0.292,0.24 10 false z33 1.823,2.74 2.167,3.021 0.344,0.281 10 false *b 0.167,1.24 0.458,1.5 0.292,0.26 10 false *1
*1 Horn Button Assembly
*2 Spiral Cable Sub-assembly
*3 Airbag ECU Assembly
*4 Wire Harness
*a Front view of wire harness connector
(to Horn Button Assembly)
*b Color: Light Green


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
z33-2 - z33-1 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

9.CHECK HARNESS AND CONNECTOR
7.CLEAR DTC
a.
C238334C01
0.313,1.01 0.313,0.344 0.313,0.344 0.563,0.344 false 0.594,0.26 1.063,0.521 0.469,0.26 10 false *1 0.427,1.01 1.031,1.688 0.604,0.677 10 false F 0.583,1.01 1.021,1.573 0.438,0.563 10 false E 1.51,1.01 1.729,1.385 0.219,0.375 10 false D 1.667,1.01 1.917,1.375 0.25,0.365 10 false C 2.094,1.01 2.49,1.354 0.396,0.344 10 false B 2.25,1.01 2.542,1.292 0.292,0.281 10 false A 1,1.01 1.49,1.656 0.49,0.646 10 false *2 2.667,1.021 2.979,1.365 0.313,0.344 10 false *3
*1 Horn Button Assembly
*2 Spiral Cable Sub-assembly
*3 Airbag ECU Assembly


Connect the connectors to the horn button 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
B00011A is not output A
B00011A is output B


HINT:

Codes other than DTC B00011A 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


9.CHECK HARNESS AND CONNECTOR
a.

Disconnect the connector from the spiral cable sub-assembly.


b.
C238335C72
0.5,2.417 0.917,2.667 0.417,0.25 0.281,0.948 0.281,1.229 false 1.281,2.604 1.063,2.958 true 1.448,2.604 1.677,2.958 true 1.969,0.823 1.969,0.396 1.969,0.396 1.802,0.396 false 0.594,2.458 0.927,2.667 0.333,0.208 10 false I22 0.396,0.802 0.583,1.208 0.188,0.406 10 false F 0.667,0.802 0.906,1.26 0.24,0.458 10 false E 1.49,0.813 1.813,1.083 0.323,0.271 10 false D 1.75,0.813 2.094,1.271 0.344,0.458 10 false C 2.104,0.813 2.531,1.292 0.427,0.479 10 false B 2.365,0.813 2.854,1.313 0.49,0.5 10 false A 1.042,0.823 1.458,1.156 0.417,0.333 10 false *2 0.208,1.25 0.667,1.594 0.458,0.344 10 false *1 2.74,0.823 3.146,1.26 0.406,0.438 10 false *3 0.344,1.969 0.719,2.313 0.375,0.344 10 false *a 1.646,2.969 2.083,3.167 0.438,0.198 10 false D- 1.646,0.323 1.979,0.604 0.333,0.281 10 false *4 0.969,2.969 1.333,3.188 0.365,0.219 10 false D+
*1 Horn Button Assembly
*2 Spiral Cable Sub-assembly
*3 Airbag ECU Assembly
*4 Wire Harness
*a Front view of wire harness connector
(to Spiral Cable Sub-assembly)


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
I22-1 (D+) - I22-2 (D-) 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

REPLACE SPIRAL CABLE SUB-ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>SPIRAL CABLE>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR