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

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for NR Series Engine)  SRS Warning Light does not Come ON  


DESCRIPTION

The SRS warning light is located in the combination meter assembly.

When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition switch is turned from off to ON, and then turns off automatically.

If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.

If a malfunction occurs in the airbag sensor with ECU assembly, combination meter assembly or wire harness connected to the airbag sensor with ECU assembly or combination meter assembly, the SRS warning light turns on.

The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the airbag sensor with ECU assembly in case the power source voltage drops.

When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the voltage of the SRS to normal voltage.

A malfunction in this circuit is not stored in the airbag sensor with ECU assembly. The SRS warning light automatically turns off when the power source voltage returns to normal.

The signal to illuminate the SRS warning light is transmitted from the airbag sensor with ECU assembly to the combination meter assembly via CAN communication.

WIRING DIAGRAM

B544757E02
0.719,1.813 2.198,2.365 1.479,0.552 10 false from Battery 4.896,0.729 5.771,0.979 0.875,0.25 10 false A/BAG-IG2 1.958,1.969 3.073,2.479 1.115,0.51 10 false ECU-DCC NO. 2 3.094,2.365 3.396,2.635 0.302,0.271 10 false ES 2.875,1.729 3.146,2.021 0.271,0.292 10 false 22 2.865,1.177 3.188,1.427 0.323,0.25 10 false 38 5.802,1.115 6.208,1.385 0.406,0.271 10 false 26 4.094,1.125 4.417,1.375 0.323,0.25 10 false 9 2.865,2.271 3.26,2.594 0.396,0.323 10 false 23 6.052,0.594 6.427,0.906 0.375,0.313 10 false IG2 3.615,1.26 4.302,1.583 0.688,0.323 10 false CANH 3.635,1.823 4.25,2.177 0.615,0.354 10 false CANL 6.063,2.365 6.354,2.625 0.292,0.26 10 false E1 6.063,2.875 6.354,3.125 0.292,0.25 10 false E2 5.875,3.625 6.385,3.917 0.51,0.292 10 false I47 3,3.604 3.406,3.854 0.406,0.25 10 false I4 5.865,3.792 7.042,4.167 1.177,0.375 10 false Airbag Sensor with ECU Assembly 3,3.771 4.198,4.333 1.198,0.563 10 false Combination Meter Assembly 5.802,1.677 6.313,1.958 0.51,0.281 10 false 27 6.052,1.26 6.583,1.5 0.531,0.24 10 false CANH 6.052,1.802 6.552,2.021 0.5,0.219 10 false CANL 5.802,0.49 6.25,0.781 0.448,0.292 10 false 36 5.813,2.271 6.208,2.521 0.396,0.25 10 false 33 5.813,2.781 6.104,2.979 0.292,0.198 10 false 32 4.094,1.677 4.5,2.031 0.406,0.354 10 false 25 3.104,1.813 3.406,2.031 0.302,0.219 10 false B 3.104,1.26 3.479,1.49 0.375,0.229 10 false IG+ 0.74,4.469 2.51,4.771 1.771,0.302 10 false : CAN Communication Line 2.917,0.563 4.427,0.875 1.51,0.313 10 false from IG2-NO. 2 Relay 3.094,2.885 3.396,3.156 0.302,0.271 10 false EP 2.854,2.781 3.156,3.052 0.302,0.271 10 false 19 0.229,1.26 2.417,1.479 2.188,0.219 10 false from Engine Stop and Start ECU

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


·

Inspect the fuses for circuits related to this system before performing the following procedure.



PROCEDURE

1.CHECK BATTERY VOLTAGE
a.

Measure the voltage of the battery.

Standard Voltage:

11 to 14 V



Result:
Proceed to
OK
NG



OK

2.CHECK CONNECTOR

NG

INSPECT CHARGING SYSTEM AND BATTERY

Click herePower Source / Network>NR Series (BATTERY / CHARGING)>CHARGING SYSTEM>ON-VEHICLE INSPECTION


2.CHECK CONNECTOR
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 connector is properly connected to the combination meter assembly.

OK:

The connector is properly connected.


HINT:

If the connector is not properly connected, reconnect the connector and proceed to the next inspection.



d.

Disconnect the connector from the combination meter assembly.


e.

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

OK:

The terminals are not deformed or damaged.



Result:
Proceed to
OK
NG



OK

3.CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE CONNECTOR

3.CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - BODY GROUND)
a.
B515929C01
0.115,0.302 0.427,0.531 0.313,0.229 2.906,1.781 2.719,1.323 true 2.375,1.792 2.719,1.146 true 0.438,1.781 0.698,1.333 true 1.885,1.792 2.302,1.156 true 0.219,0.333 0.563,0.625 0.344,0.292 10 false I4 0.094,0.063 0.458,0.26 0.365,0.198 10 false *a 2.844,1.802 3.188,2.094 0.344,0.292 10 false IG+ 2.323,1.802 2.667,2.094 0.344,0.292 10 false B 0.333,1.802 0.677,2.094 0.344,0.292 10 false ES 1.781,1.802 2.125,2.094 0.344,0.292 10 false EP
*a Front view of wire harness connector
(to Combination Meter Assembly)


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


b.

Turn the ignition switch to ON.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
I4-38 (IG+) - Body ground Ignition switch ON 10.5 to 16 V
I4-22 (B) - Body ground Always 11 to 14 V



d.

Turn the ignition switch off.


e.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I4-23 (ES) - Body ground Always Below 1 Ω
I4-19 (EP) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.CHECK SRS WARNING LIGHT

NG

REPAIR OR REPLACE WIRE HARNESS

4.CHECK SRS WARNING LIGHT
a.

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.



b.

Connect the connector to the combination meter assembly.


c.

Disconnect the connector from the airbag sensor with ECU assembly.


d.

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


e.

Turn the ignition switch to ON and check the SRS warning light condition.

OK:

After the primary check period, the SRS warning light turns off for approximately 10 seconds and then turns back on.


HINT:

The primary check period is approximately 6 seconds after the ignition switch is turned to ON.



Result:
Proceed to
OK
NG



OK

REPLACE AIRBAG SENSOR WITH ECU ASSEMBLY

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


NG

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL