RM3660EC _58 Vehicle Interior _080741 SUPPLEMENTAL RESTRAINT SYSTEMS _0610731 AIRBAG SYSTEM(for NR Series Engine) C

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for NR Series Engine)  B1617  Front Airbag Sensor Lost Communication (LH)  B1618  Front Airbag Sensor Initialization Error (LH)  


DESCRIPTION

The front airbag sensor LH circuit consists of the airbag sensor with ECU assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the airbag sensor with ECU assembly to determine if the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the front airbag sensor LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1617 Front Airbag Sensor Lost Communication (LH)
·

The airbag sensor with ECU assembly detects a line short, short to ground or B+, or an open in the front airbag sensor LH circuit.

·

Front airbag sensor LH malfunction

·

Airbag sensor with ECU assembly malfunction


·

Instrument panel wire

·

Engine room main wire

·

Front airbag sensor LH

·

Airbag sensor with ECU assembly


Comes on Does not apply to test/check mode
B1618 Front Airbag Sensor Initialization Error (LH)
·

The airbag sensor with ECU assembly detects a line short, short to ground or B+, or an open in the front airbag sensor LH circuit.

·

Front airbag sensor LH malfunction

·

Airbag sensor with ECU assembly malfunction


·

Instrument panel wire

·

Engine room main wire

·

Front airbag sensor LH

·

Airbag sensor with ECU assembly


Comes on Does not apply to test/check mode

WIRING DIAGRAM

B473428E72
4.781,2.896 7.073,3.354 2.292,0.458 10 false Airbag Sensor with ECU Assembly 4.771,2.729 6.844,3.198 2.073,0.469 10 false I47 4.583,1.021 5.042,1.323 0.458,0.302 10 false 30 4.583,1.698 5.333,2.073 0.75,0.375 10 false 31 4.833,1.021 5.292,1.323 0.458,0.302 10 false +SL 4.844,1.698 5.594,2.073 0.75,0.375 10 false -SL 5.479,1.448 6.156,1.74 0.677,0.292 10 false Interface 1.771,1.448 2.448,1.74 0.677,0.292 10 false Interface 0.76,1.448 1.438,1.74 0.677,0.292 10 false Element 3.781,1.125 4.24,1.427 0.458,0.302 10 false AI4 3.781,1.802 4.24,2.104 0.458,0.302 10 false AI4 3.833,0.938 4.292,1.24 0.458,0.302 10 false 2 3.833,1.615 4.292,1.917 0.458,0.302 10 false 1 3.042,1.021 3.5,1.323 0.458,0.302 10 false 2 3.042,1.708 3.5,2.01 0.458,0.302 10 false 1 2.667,1.021 3.125,1.323 0.458,0.302 10 false +SL 2.708,1.708 3.458,2.083 0.75,0.375 10 false -SL 0.563,2.344 2.635,2.813 2.073,0.469 10 false A7 0.563,2.521 2.635,2.99 2.073,0.469 10 false Front Airbag Sensor LH

CAUTION / NOTICE / HINT

NOTICE:
·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

HINT:

When disconnecting and reconnecting the 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




PROCEDURE

1.CHECK CONNECTION OF CONNECTORS
a.

Turn the ignition switch off.


b.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.



c.

Check that the connectors are properly connected to the airbag sensor with ECU assembly and front airbag sensor LH. Also check that the connectors that link the engine room main wire and instrument panel wire are properly connected.

OK:

The connectors are properly connected.



Result:
Proceed to
OK
NG



OK

2.CHECK CONNECTORS

NG

CONNECT CONNECTORS PROPERLY

2.CHECK CONNECTORS
a.

Disconnect the connectors from the airbag sensor with ECU assembly and front airbag sensor LH. Also disconnect the connectors that link the engine room main wire and instrument panel wire.


b.

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

OK:

The terminals are not deformed or damaged.



Result:
Proceed to
OK
NG



OK

3.CHECK FRONT AIRBAG SENSOR LH CIRCUIT

NG

REPLACE INSTRUMENT PANEL WIRE OR ENGINE ROOM MAIN WIRE

3.CHECK FRONT AIRBAG SENSOR LH CIRCUIT
a.
B473431C05
0.865,0.802 1.219,1.021 0.354,0.219 0.5,3.719 0.854,3.938 0.354,0.219 1.792,1.74 1.792,1.573 false 1.458,1.594 1.76,1.219 false 2.146,1.594 1.844,1.219 false 0.896,4.26 1.24,3.833 false 1.781,4.25 1.448,3.833 false 1.156,2.615 1.156,2.25 1.156,2.25 0.979,2.25 false 1.792,3.031 1.792,2.74 false 0.302,2.594 0.729,3 0.427,0.406 10 false *1 2.729,2.604 3.104,3.052 0.375,0.448 10 false *2 1.719,1.75 2.073,2.073 0.354,0.323 10 false *5 0.635,0.188 1.042,0.521 0.406,0.333 10 false *a 0.375,3.406 0.719,3.667 0.344,0.26 10 false *b 2.354,2.604 2.729,3.052 0.375,0.448 10 false A 1.979,2.604 2.354,3.052 0.375,0.448 10 false B 1.521,2.604 1.896,3.052 0.375,0.448 10 false C 1.354,2.604 1.729,3.052 0.375,0.448 10 false D 0.885,2.604 1.26,3.052 0.375,0.448 10 false E 0.521,2.604 0.896,3.052 0.375,0.448 10 false F 0.948,0.823 1.354,1.156 0.406,0.333 10 false I47 1.302,1.594 1.656,1.917 0.354,0.323 10 false +SL 2.042,1.594 2.396,1.917 0.354,0.323 10 false -SL 0.583,3.75 0.99,4.083 0.406,0.333 10 false A7 1.667,4.26 2.021,4.583 0.354,0.323 10 false +SL 0.76,4.26 1.115,4.583 0.354,0.323 10 false -SL 0.823,2.167 1.167,2.427 0.344,0.26 10 false *3 1.719,3.052 2.094,3.5 0.375,0.448 10 false *4
*1 Front Airbag Sensor LH
*2 Airbag Sensor with ECU Assembly
*3 Engine Room Main Wire
*4 Instrument Panel Wire
*5 Service Wire
*a Front view of wire harness connector
(to Airbag Sensor with ECU Assembly)
*b Front view of wire harness connector
(to Front Airbag Sensor LH)


Connect the connectors that link the engine room main wire and instrument panel wire.


b.

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


c.

Turn the ignition switch to ON.


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A7-2 (+SL) - Body ground Ignition switch ON Below 1 V
A7-1 (-SL) - Body ground Ignition switch ON Below 1 V



e.

Turn the ignition switch off.


f.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.



g.

Using a service wire, connect terminals 30 (+SL) and 31 (-SL) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.



h.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A7-2 (+SL) - A7-1 (-SL) Always Below 1 Ω



i.

Disconnect the service wire from connector B.


j.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A7-2 (+SL) - A7-1 (-SL) Always 1 MΩ or higher
A7-2 (+SL) - Body ground Always 1 MΩ or higher
A7-1 (-SL) - Body ground Always 1 MΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK FRONT AIRBAG SENSOR LH

NG

5.CHECK INSTRUMENT PANEL WIRE
4.CHECK FRONT AIRBAG SENSOR LH
a.
C238386C02
2.083,1.01 2.448,1.5 0.365,0.49 10 A 1.927,1.01 2.427,1.479 0.5,0.469 10 B 1.583,1.01 1.969,1.521 0.385,0.51 10 C 1.427,1.01 1.844,1.583 0.417,0.573 10 D 1.083,1.01 1.531,1.667 0.448,0.656 10 E 0.938,1.01 1.521,1.75 0.583,0.74 10 F 0.563,1.021 1.125,1.594 0.563,0.573 10 *1 2.542,1.031 2.885,1.563 0.344,0.531 10 *2
*1 Front Airbag Sensor RH
*2 Airbag Sensor with ECU Assembly


Connect the connector to the airbag sensor with ECU assembly.


b.

Interchange the front airbag sensor LH with RH and connect the connectors.


c.

Connect the cable to the negative (-) 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 188

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 188
HINT:

Codes other than DTCs B1612, B1613, B1617 and B1618 may be output at this time, but they are not related to this check.



Result:
Result Proceed to
DTCs B1612, B1613, B1617 and B1618 are not output. A
DTC B1617 or B1618 is output. B
DTC B1612 or B1613 is output. C


i.

Turn the ignition switch off.


j.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.



k.

Return the front airbag sensor LH and RH to their original positions and connect the connectors.



A

USE SIMULATION METHOD TO CHECK

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


B

REPLACE AIRBAG SENSOR WITH ECU ASSEMBLY

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


C

REPLACE FRONT AIRBAG SENSOR LH

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>FRONT AIRBAG SENSOR>REMOVAL


5.CHECK INSTRUMENT PANEL WIRE
a.
B473432C05
0.875,0.792 1.208,1 0.333,0.208 0.979,3.646 1.313,3.854 0.333,0.208 1.802,1.719 1.802,1.542 false 1.458,1.542 1.76,1.198 false 2.135,1.542 1.833,1.198 false 1.854,2.573 1.854,2.073 1.854,2.073 1.604,2.073 false 1.104,3.042 1.104,2.708 false 1.5,4.083 1.896,3.729 false 2.5,4.083 2.125,3.729 false 0.302,2.573 0.688,2.854 0.385,0.281 10 false *1 2.74,2.563 3.281,3.104 0.542,0.542 10 false *2 1.74,1.729 2.135,1.99 0.396,0.26 10 false *5 1.042,3.063 1.417,3.333 0.375,0.271 10 false *3 1.448,2.01 1.927,2.417 0.479,0.406 10 false *4 0.656,0.188 1.042,0.49 0.385,0.302 10 false *a 0.76,3.385 1.135,3.75 0.375,0.365 10 false *b 2.344,2.563 2.885,3.104 0.542,0.542 10 false A 2.052,2.563 2.594,3.104 0.542,0.542 10 false B 1.583,2.563 2.125,3.104 0.542,0.542 10 false C 1.292,2.563 1.833,3.104 0.542,0.542 10 false D 0.823,2.563 1.365,3.104 0.542,0.542 10 false E 0.521,2.563 1.063,3.104 0.542,0.542 10 false F 0.969,0.813 1.354,1.115 0.385,0.302 10 false I47 1.292,1.552 1.833,1.917 0.542,0.365 10 false +SL 2.042,1.552 2.583,1.917 0.542,0.365 10 false -SL 1.063,3.667 1.448,3.969 0.385,0.302 10 false AI4 1.354,4.094 1.74,4.396 0.385,0.302 10 false +SL 2.417,4.094 2.802,4.396 0.385,0.302 10 false -SL
*1 Front Airbag Sensor LH
*2 Airbag Sensor with ECU Assembly
*3 Engine Room Main Wire
*4 Instrument Panel Wire
*5 Service Wire
*a Front view of wire harness connector
(to Airbag Sensor with ECU Assembly)
*b Front view of wire harness connector
(to Engine Room Main Wire)


Disconnect the instrument panel wire connector from the engine room main wire.


b.

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


c.

Turn the ignition switch to ON.


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
AI4-2 (+SL) - Body ground Ignition switch ON Below 1 V
AI4-1 (-SL) - Body ground Ignition switch ON Below 1 V



e.

Turn the ignition switch off.


f.

Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.



g.

Using a service wire, connect terminals 30 (+SL) and 31 (-SL) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.



h.

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

Standard Resistance:
Tester Connection Condition Specified Condition
AI4-2 (+SL) - AI4-1 (-SL) Always Below 1 Ω



i.

Disconnect the service wire from connector B.


j.

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

Standard Resistance:
Tester Connection Condition Specified Condition
AI4-2 (+SL) - AI4-1 (-SL) Always 1 MΩ or higher
AI4-2 (+SL) - Body ground Always 1 MΩ or higher
AI4-1 (-SL) - Body ground Always 1 MΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE ENGINE ROOM MAIN WIRE

NG

REPLACE INSTRUMENT PANEL WIRE