RM36D0EC _58 Vehicle Interior _083100 SUPPLEMENTAL RESTRAINT SYSTEMS _0694959 AIRBAG SYSTEM(for GTMC Made) C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for GTMC Made)  B00021A  Driver Frontal Stage 2 Deployment Control circuit resistance below threshold  


DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B00021A Driver Frontal Stage 2 Deployment Control circuit resistance below threshold One of the following conditions is met:
·

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

·

A spiral cable sub-assembly malfunction.

·

A horn button assembly (driver side squib 2nd step) malfunction.

·

An airbag ECU assembly malfunction.


·

Wire harness

·

Spiral cable sub-assembly

·

Horn button assembly (driver side squib 2nd step)

·

Airbag ECU assembly


Comes on Applicable

WIRING DIAGRAM

E511507E02
5.25,1.208 5.396,1.354 0.146,0.146 10 false 8 5.24,0.396 5.344,0.542 0.104,0.146 10 false 9 3.073,0.396 3.177,0.542 0.104,0.146 10 false 4 3.073,1.219 3.177,1.365 0.104,0.146 10 false 3 1.99,1.229 2.094,1.375 0.104,0.146 10 false 1 1.99,0.396 2.094,0.542 0.104,0.146 10 false 2 5.448,0.479 5.781,0.646 0.333,0.167 10 false D2+ 5.448,1.323 5.948,1.51 0.5,0.188 10 false D2- 2.698,0.396 3.219,0.583 0.521,0.188 10 false D2+ 2.729,1.219 3.208,1.427 0.479,0.208 10 false D2- 5.333,1.729 7.146,1.896 1.813,0.167 10 false G70 2,1.708 2.365,1.875 0.365,0.167 10 false G21 2,1.844 3.135,2.406 1.135,0.563 10 false Spiral Cable Sub-assembly 0.083,1.719 1.906,2.042 1.823,0.323 10 false z4 5.344,1.885 6.896,2.146 1.552,0.26 10 false Airbag ECU Assembly 0.094,1.875 1.917,2.198 1.823,0.323 10 false Horn Button Assembly (Driver Side Squib 2nd Step)

CAUTION / NOTICE / HINT

NOTICE:
·

When installing the spiral cable sub-assembly and steering wheel, be sure to adjust the spiral cable sub-assembly as it may break if the steering wheel is turned before adjusting the spiral cable sub-assembly.

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

·

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 GTMC 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 B00021A is output
Past DTC B00021A is output



DTC B00021A is output

2.CHECK CONNECTION OF CONNECTORS

Past DTC B00021A 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 GTMC Made)>CHECK MODE PROCEDURE

·

Perform the simulation method while checking the Data List.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for GTMC 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 horn button assembly (driver side squib 2nd step), 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.
C371112C01
0.198,0.813 0.51,1.01 0.313,0.198 10 false *1 1.052,1.375 1.365,1.573 0.313,0.198 10 false *3 2.781,1.583 3.094,1.781 0.313,0.198 10 false *2 1.979,0.823 2.292,1.021 0.313,0.198 10 false *4
*1 Horn Button Assembly (Driver Side Squib 2nd Step)
*2 Airbag ECU Assembly
*3 Spiral Cable Sub-assembly
*4 Wire Harness


Disconnect the airbag ECU assembly connector.


b.

Disconnect the spiral cable sub-assembly connector.


c.

Disconnect the horn button assembly (driver side squib 2nd step) connector.


d.

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

OK:

The terminals of the connectors are not deformed or damaged.



e.

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.



f.

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 HORN BUTTON ASSEMBLY (DRIVER SIDE SQUIB 2ND STEP)

NG

REPAIR OR REPLACE WIRE HARNESS OR SPIRAL CABLE SUB-ASSEMBLY

4.CHECK HORN BUTTON ASSEMBLY (DRIVER SIDE SQUIB 2ND STEP)
a.
C411565C04
0.333,2.115 0.688,2.333 0.354,0.219 1.479,2.698 1.688,2.885 1.688,2.885 1.833,2.885 true 1.719,2.229 1.885,2.146 1.885,2.146 1.99,2.146 true 2.344,0.615 2.656,0.771 0.313,0.156 10 false A 0.292,0.865 0.604,1.021 0.313,0.156 10 false *1 2.719,1.281 3.031,1.438 0.313,0.156 10 false *2 1.177,1 1.49,1.156 0.313,0.156 10 false *3 2.042,2.052 2.354,2.208 0.313,0.156 10 false *5 0.365,1.719 0.677,1.875 0.313,0.156 10 false *a 1.906,2.813 2.219,2.969 0.313,0.156 10 false *b 2.188,0.615 2.5,0.771 0.313,0.156 10 false B 1.76,0.625 2.073,0.781 0.313,0.156 10 false C 1.594,0.625 2.104,0.771 0.51,0.146 10 false D 0.76,0.625 1.271,0.771 0.51,0.146 10 false E 0.438,0.625 0.948,0.771 0.51,0.146 10 false F 0.427,2.125 0.74,2.281 0.313,0.156 10 false z4 1.969,0.854 2.281,1.01 0.313,0.156 10 false *4
*1 Horn Button Assembly (Driver Side Squib 2nd Step)
*2 Airbag ECU Assembly
*3 Spiral Cable Sub-assembly
*4 Wire Harness
*5 SST
*a Front view of wire harness connector
(to Horn Button Assembly (Driver Side Squib 2nd Step))
*b Color: Black


Connect the G70 airbag ECU assembly connector.


b.

Connect the G21 spiral cable sub-assembly connector.


c.

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

CAUTION:

Never connect the tester to the horn button assembly (driver side squib 2nd step) 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  

d.

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


e.

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


f.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs
50002 444

g.

Turn the ignition switch off.


h.

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


i.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444
Result:
Proceed to
DTC B00021A is not output
DTC B00021A is output


HINT:

Codes other than DTC B00021A may be output at this time, but they are not related to this check.



j.

Turn the ignition switch off.


k.

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


l.

Disconnect SST from connector E.



DTC B00021A is not output

REPLACE HORN BUTTON ASSEMBLY

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


DTC B00021A is output

5.CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT
5.CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT
a.
C415628C06
0.583,2.167 1,2.417 0.417,0.25 1.896,2.719 1.708,2.719 1.708,2.719 1.573,2.573 true 2.521,0.531 2.76,0.844 0.24,0.313 10 false A 2.208,0.542 2.448,0.854 0.24,0.313 10 false B 1.76,0.531 2,0.844 0.24,0.313 10 false C 1.604,0.531 1.844,0.844 0.24,0.313 10 false D 0.76,0.542 1,0.854 0.24,0.313 10 false E 0.448,0.542 0.688,0.854 0.24,0.313 10 false F 0.25,1.698 0.698,2.01 0.448,0.313 10 false *a 0.719,2.208 1.167,2.521 0.448,0.313 10 false z4 1.969,2.656 2.417,2.969 0.448,0.313 10 false *b 0.271,0.792 0.5,0.99 0.229,0.198 10 false *1 2.813,1.125 3.26,1.438 0.448,0.313 10 false *2 1.156,0.906 1.604,1.219 0.448,0.313 10 false *3 1.927,0.76 2.375,1.073 0.448,0.313 10 false *4
*1 Horn Button Assembly (Driver Side Squib 2nd Step)
*2 Airbag ECU Assembly
*3 Spiral Cable Sub-assembly
*4 Wire Harness
*a Front view of wire harness connector
(to Horn Button Assembly (Driver Side Squib 2nd Step))
*b Color: Black
V100135

Release the activation prevention mechanism


Disconnect the G70 airbag ECU assembly connector.


b.

Release the activation prevention mechanism built into connector B.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for GTMC Made)>SYSTEM DESCRIPTION


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
z4-2 - z4-1 Always 1 MΩ or higher



d.

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


Result:
Proceed to
OK
NG



OK

6.CHECK DTC

NG

7.CHECK HARNESS AND CONNECTOR
6.CHECK DTC
a.
C238334C10
0.177,1.229 0.646,1.49 0.469,0.26 10 false *1 2.75,1.667 3.302,2.042 0.552,0.375 10 false *2 1.052,1.438 1.365,1.781 0.313,0.344 10 false *3
*1 Horn Button Assembly (Driver Side Squib 2nd Step)
*2 Airbag ECU Assembly
*3 Spiral Cable Sub-assembly


Connect the airbag ECU assembly connector.


b.

Connect the horn button assembly (driver side squib 2nd step) 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
DTC B00021A is not output
DTC B00021A is output


HINT:

Codes other than DTC B00021A 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.



DTC B00021A 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 GTMC Made)>CHECK MODE PROCEDURE

·

Perform the simulation method while checking the Data List.

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




DTC B00021A is output

REPLACE AIRBAG ECU ASSEMBLY

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


7.CHECK HARNESS AND CONNECTOR
a.
C371114C23
0.333,2.281 0.719,2.479 0.385,0.198 1.031,2.99 1.406,2.99 1.406,2.99 1.552,2.635 true 1.99,3.01 1.854,3.01 1.854,3.01 1.677,2.625 true 0.146,0.615 0.458,0.813 0.313,0.198 10 false *1 1.906,0.604 2.219,0.802 0.313,0.198 10 false *4 2.74,1.469 3.052,1.667 0.313,0.198 10 false *2 1.031,1.177 1.344,1.375 0.313,0.198 10 false *3 0.344,1.979 0.656,2.177 0.313,0.198 10 false *a 0.792,2.906 1.146,3.094 0.354,0.188 10 false D2- 2.042,2.906 2.375,3.104 0.333,0.198 10 false D2+ 0.427,2.313 1.031,2.563 0.604,0.25 10 false G21 2.365,0.802 2.677,1 0.313,0.198 10 false A 2.104,0.813 2.417,1.01 0.313,0.198 10 false B 1.76,0.823 2.073,1.021 0.313,0.198 10 false C 1.479,0.823 1.792,1.021 0.313,0.198 10 false D 0.656,0.813 0.969,1.01 0.313,0.198 10 false E 0.396,0.813 0.708,1.01 0.313,0.198 10 false F
*1 Horn Button Assembly (Driver Side Squib 2nd Step)
*2 Airbag ECU Assembly
*3 Spiral Cable Sub-assembly
*4 Wire Harness
*a Front view of wire harness connector
(to Spiral Cable Sub-assembly)
V100135

Release the activation prevention mechanism


Disconnect the spiral cable sub-assembly connector.


b.

Release the activation prevention mechanism built into connector B.

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for GTMC Made)>SYSTEM DESCRIPTION


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G21-4 (D2+) - G21-3 (D2-) Always 1 MΩ or higher



d.

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


Result:
Proceed to
OK
NG



OK

REPLACE SPIRAL CABLE SUB-ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR