RM3090E _58 Vehicle Interior _008786 SUPPLEMENTAL RESTRAINT SYSTEMS _0066372 AIRBAG SYSTEM(w/ Occupant Classification System) J

SUPPLEMENTAL RESTRAINT SYSTEMS AIRBAG SYSTEM(w/ Occupant Classification System) Diagnosis Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

DTCs are output by the blinking of the SRS warning light.

HINT:: ·

When each warning light continues blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.

·

A DTC output mode signal is transmitted through the CAN communication system to each ECU, including the airbag sensor assembly. Thus, when all systems do not enter DTC output mode, there may be an ECM malfunction.

WIRING DIAGRAM

1.635,0.552 2.125,0.75 0.49,0.198 10 false CANL 1.615,1.094 2.104,1.292 0.49,0.198 10 false CANH 1.26,2.615 1.75,2.813 0.49,0.198 10 false ECM 1.26,3.438 1.542,3.635 0.281,0.198 10 false CG 1.823,3.438 2.104,3.635 0.281,0.198 10 false TC 2.042,3.302 2.26,3.49 0.219,0.188 10 false 13 1.25,2.448 1.604,2.646 0.354,0.198 10 false A62 2.063,0.427 2.302,0.635 0.24,0.208 10 false 26 2.052,0.99 2.292,1.198 0.24,0.208 10 false 13 2.063,1.573 2.302,1.781 0.24,0.208 10 false 23 1.802,1.677 2.083,1.865 0.281,0.188 10 false TC 5.771,0.427 6.01,0.635 0.24,0.208 10 false 22 5.771,0.979 6.01,1.188 0.24,0.208 10 false 13 6,0.531 6.49,0.729 0.49,0.198 10 false CANL 6.01,1.094 6.5,1.292 0.49,0.198 10 false CANH 1.229,3.917 1.583,4.115 0.354,0.198 10 false G14 5.823,3.844 6.156,4.042 0.333,0.198 10 false G92 1.229,4.083 1.719,4.281 0.49,0.198 10 false DLC3 0.531,4.438 3.063,4.656 2.531,0.219 10 false : CAN Communication Line 5.823,4.01 6.698,4.375 0.875,0.365 10 false Airbag Sensor Assembly 1.104,3.313 1.25,3.552 0.146,0.24 10 false 4

CAUTION / NOTICE / HINT

NOTICE:: ·

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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·

When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

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·

After replacing the airbag sensor assembly, refer to initialization.

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PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

Check if a CAN communication DTC is output.

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Result:

Proceed to
DTCs are output
DTC is not output

DTCs are output

GO TO CAN COMMUNICATION SYSTEM

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DTC is not output

2.CHECK HARNESS AND CONNECTOR (DLC3 - ECM)

Turn the ignition switch off.

0.531,0.771 0.917,0.99 0.385,0.219 3.885,0.729 4.271,0.948 0.385,0.219 2.198,1.417 2.094,1.135 false 6.125,1.323 5.438,1.01 false 0.802,0.073 1.115,0.229 0.313,0.156 10 false *a 4.604,0.083 4.917,0.24 0.313,0.156 10 false *b 0.594,0.792 0.906,0.948 0.313,0.156 10 false G14 3.938,0.75 4.25,0.906 0.313,0.156 10 false A62 2.219,1.448 2.531,1.604 0.313,0.156 10 false TC 6.198,1.292 6.51,1.448 0.313,0.156 10 false TC

Front view of DLC3

Front view of wire harness connector
(to ECM)

Disconnect the A62 connector from the ECM.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
G14-13 (TC) - A62-23 (TC)	Always	Below 1 Ω

Result:

Proceed to
OK
NG

3.CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

1.458,0.281 1.844,0.51 0.385,0.229 1.635,1.073 1.24,1.698 false 0.094,0.125 0.313,0.354 0.219,0.229 10 false *a 1.021,1.75 1.302,1.938 0.281,0.188 10 false CG 1.51,0.302 1.802,0.448 0.292,0.146 10 false G14

*a	Front view of DLC3

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
G14-4 (CG) - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

4.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

1.417,0.115 1.781,0.406 0.365,0.292 2.021,1.167 2.531,1.406 false 0.115,0.135 0.427,0.292 0.313,0.156 10 false *a 2.604,1.344 2.917,1.5 0.313,0.156 10 false TC 1.49,0.177 1.844,0.375 0.354,0.198 10 false A62

*a	Front view of wire harness connector (to ECM)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A62-23 (TC) - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

REPLACE AIRBAG SENSOR ASSEMBLY

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REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU

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