RM36D0EC _58 Vehicle Interior _083100 SUPPLEMENTAL RESTRAINT SYSTEMS _0694957 AIRBAG SYSTEM(for SFTM Made) J

SUPPLEMENTAL RESTRAINT SYSTEMS  AIRBAG SYSTEM(for SFTM Made)  SRS Warning Light Remains 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 goes off automatically.

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

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

When the auxiliary 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 recorded in the airbag ECU assembly. The SRS warning light automatically goes off when the source voltage returns to normal.

The signal to illuminate the SRS warning light is transmitted from the airbag ECU assembly to the combination meter assembly through the CAN communication system.

WIRING DIAGRAM

for 7 Inch Multi-information Display:
B721711E01
5.625,3.75 7.146,4.063 1.521,0.313 10 false Airbag ECU Assembly 2.906,3.76 4.802,4.042 1.896,0.281 10 false Combination Meter Assembly 0.313,1.938 1.417,2.427 1.104,0.49 10 false from Engine Stop and Start ECU 0.792,4.302 3.563,4.531 2.771,0.229 10 false : CAN Communication Line 4.896,0.615 5.76,0.979 0.865,0.365 10 false A/BAG-IGR 2.896,3.573 3.281,3.76 0.385,0.188 10 false G18 3.469,2.042 3.854,2.229 0.385,0.188 10 false IG+ 6.083,0.448 6.469,0.635 0.385,0.188 10 false IGR 3.167,1.885 3.469,2.073 0.302,0.188 10 false 38 3.188,2.76 3.49,2.948 0.302,0.188 10 false 23 5.792,2.771 6.094,2.958 0.302,0.188 10 false 32 5.792,2.26 6.094,2.448 0.302,0.188 10 false 33 5.781,0.375 6.083,0.563 0.302,0.188 10 false 36 6.083,2.375 6.385,2.563 0.302,0.188 10 false E1 6.073,2.896 6.375,3.083 0.302,0.188 10 false E2 3.479,2.885 3.781,3.073 0.302,0.188 10 false ES 5.635,3.573 6.042,3.76 0.406,0.188 10 false G70 2.927,0.427 4.385,0.646 1.458,0.219 10 false from IGR NO.1 Relay

for 12.3 Inch Multi-information Display:
B721710E01
5.625,3.75 7.146,4.063 1.521,0.313 10 false Airbag ECU Assembly 2.906,3.76 4.802,4.042 1.896,0.281 10 false Combination Meter Assembly 2.156,2.177 3.021,2.396 0.865,0.219 10 false METER-IGR 0.083,2.01 1.542,2.229 1.458,0.219 10 false from IGR NO.1 Relay*1 0.792,4.302 3.563,4.531 2.771,0.229 10 false : CAN Communication Line 4.896,0.615 5.76,0.979 0.865,0.365 10 false A/BAG-IGR 2.896,3.573 3.354,3.76 0.458,0.188 10 false G151 3.469,2.042 3.854,2.229 0.385,0.188 10 false IG+ 6.083,0.448 6.469,0.635 0.385,0.188 10 false IGR 3.219,1.885 3.521,2.073 0.302,0.188 10 false 6 3.26,2.76 3.563,2.948 0.302,0.188 10 false 2 5.792,2.75 6.094,2.938 0.302,0.188 10 false 32 5.792,2.24 6.094,2.427 0.302,0.188 10 false 33 5.781,0.344 6.083,0.531 0.302,0.188 10 false 36 6.083,2.375 6.385,2.563 0.302,0.188 10 false E1 6.073,2.896 6.375,3.083 0.302,0.188 10 false E2 3.479,2.885 3.781,3.073 0.302,0.188 10 false ES 5.635,3.573 6.042,3.76 0.406,0.188 10 false G70 2.927,0.427 4.385,0.646 1.458,0.219 10 false from IGR NO.1 Relay 0.115,1.375 1.469,1.875 1.354,0.5 10 false from Engine Stop and Start ECU*2 0.167,3.396 2.146,3.646 1.979,0.25 10 false *1: for HV Model 0.177,3.75 2.156,4 1.979,0.25 10 false *2: for Gasoline Model 2,1.365 2.302,1.552 0.302,0.188 10 false *2 2.01,1.938 2.313,2.125 0.302,0.188 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

·

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

·

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

·

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.



PROCEDURE

1.CHECK SRS WARNING LIGHT OPERATION
a.

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

HINT:

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



Result:
Result Proceed to
After the primary check period, the SRS warning light remains on. A
After the primary check period, the SRS warning light goes off and comes on again. B



A

2.CHECK AUXILIARY BATTERY

B

7.CHECK CAN COMMUNICATION SYSTEM
2.CHECK AUXILIARY BATTERY
a.

Measure the auxiliary battery voltage with the ignition switch off.

Standard voltage:

11 to 14 V


HINT:

It may be possible to tell whether the auxiliary battery is discharged by operating the horn.

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.



Result:
Proceed to
OK
NG



OK

3.CHECK CONNECTOR

NG

REPLACE OR RECHARGE AUXILIARY BATTERY

3.CHECK CONNECTOR
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 connector is properly connected to the airbag ECU assembly.


Result:
Proceed to
The connectors are properly connected
The connectors are not properly connected



The connectors are properly connected

4.CHECK CONNECTOR

The connectors are not properly connected

CONNECT CONNECTORS PROPERLY

4.CHECK CONNECTOR
a.
C414926C01
0.656,1.49 0.969,1.688 0.313,0.198 10 false *1 2.594,1.635 2.906,1.833 0.313,0.198 10 false *2 1.604,1.24 1.917,1.438 0.313,0.198 10 false *3
*1 Combination Meter Assembly
*2 Airbag ECU Assembly
*3 Wire Harness


Disconnect the airbag ECU assembly connector.


b.

Check that the connectors (on the airbag ECU assembly side) are not damaged.


Result:
Proceed to
The connectors are not deformed or damaged
The connectors are deformed or damaged



The connectors are not deformed or damaged

5.CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - BATTERY AND BODY GROUND)

The connectors are deformed or damaged

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - BATTERY AND BODY GROUND)
a.
C411578C10
0.5,0.938 0.948,1.188 0.448,0.25 2.094,1.906 1.844,1.906 1.844,1.906 1.906,1.417 true 1.135,1.896 1.302,1.896 1.302,1.896 1.792,1.406 true 2.729,1.75 2.573,1.75 2.573,1.75 2.229,1.396 true 0.167,0.135 0.427,0.354 0.26,0.219 10 false *a 0.604,0.99 0.927,1.208 0.323,0.219 10 false G70 2.833,1.667 3.167,1.865 0.333,0.198 10 false IGR 2.188,1.823 2.469,2 0.281,0.177 10 false E1 0.906,1.823 1.26,2.021 0.354,0.198 10 false E2
*a Front view of wire harness connector
(to Airbag ECU Assembly)


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


b.

Turn the ignition switch to ON.


c.

Operate all components of the electrical systems (defogger, wipers, headlights, heater blower, etc.).


d.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G70-36 (IGR) - Body ground Ignition switch ON 8 to 16 V



e.

Turn the ignition switch off.


f.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G70-33 (E1) - Body ground Always Below 1 Ω
G70-32 (E2) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.CHECK SRS WARNING LIGHT (SHORT TO GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK SRS WARNING LIGHT (SHORT TO GROUND)
a.
C414927C01
0.74,1.51 1.052,1.708 0.313,0.198 10 false *1 2.677,1.625 2.99,1.823 0.313,0.198 10 false *2 1.698,0.823 2.01,1.021 0.313,0.198 10 false *3
*1 Combination Meter Assembly
*2 Airbag ECU Assembly
*3 Wire Harness


Turn the ignition switch to ON.


b.

Approximately 6 seconds after the ignition switch to ON, check the condition of the SRS warning light.


Result:
Proceed to
Turns off for 10 seconds, and then illuminates
Turns off for 10 seconds, and then remains off



Turns off for 10 seconds, and then illuminates

REPLACE AIRBAG ECU ASSEMBLY

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


Turns off for 10 seconds, and then remains off

REPLACE COMBINATION METER ASSEMBLY

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


8.CHECK AUXILIARY BATTERY
a.

Measure the auxiliary battery voltage with the ignition switch off.

Standard voltage:

11 to 14 V


HINT:

It may be possible to tell whether the auxiliary battery is discharged by operating the horn.

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.



Result:
Proceed to
OK
NG



OK

9.CHECK CONNECTOR

NG

REPLACE OR RECHARGE AUXILIARY BATTERY

9.CHECK CONNECTOR
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 connector is properly connected to the combination meter assembly and airbag ECU assembly.


Result:
Proceed to
The connectors are properly connected
The connectors are not properly connected



The connectors are properly connected

10.CHECK CONNECTOR

The connectors are not properly connected

CONNECT CONNECTORS PROPERLY

10.CHECK CONNECTOR
a.
C413952C02
0.542,1.458 0.854,1.656 0.313,0.198 10 false *1 2.719,1.563 3.031,1.76 0.313,0.198 10 false *2 1.635,0.792 1.865,0.948 0.229,0.156 10 false *3
*1 Combination Meter Assembly
*2 Airbag ECU Assembly
*3 Wire Harness


Disconnect the airbag ECU assembly connector.


b.

Disconnect the combination meter assembly connector.


c.

Check that the connectors (on the combination meter assembly side and airbag ECU assembly side) are not damaged.


Result:
Proceed to
The connectors are not deformed or damaged
The connectors are deformed or damaged



The connectors are not deformed or damaged

11.CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - BATTERY AND BODY GROUND)

The connectors are deformed or damaged

REPAIR OR REPLACE HARNESS AND CONNECTOR

11.CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - BATTERY AND BODY GROUND)
a.
C411578C10
0.5,0.938 0.948,1.188 0.448,0.25 2.094,1.906 1.844,1.906 1.844,1.906 1.906,1.417 true 1.135,1.896 1.302,1.896 1.302,1.896 1.792,1.406 true 2.729,1.75 2.573,1.75 2.573,1.75 2.229,1.396 true 0.167,0.135 0.427,0.354 0.26,0.219 10 false *a 0.604,0.99 0.927,1.208 0.323,0.219 10 false G70 2.833,1.667 3.167,1.865 0.333,0.198 10 false IGR 2.188,1.823 2.469,2 0.281,0.177 10 false E1 0.906,1.823 1.26,2.021 0.354,0.198 10 false E2
*a Front view of wire harness connector
(to Airbag ECU Assembly)


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


b.

Turn the ignition switch to ON.


c.

Operate all components of the electrical systems (defogger, wipers, headlights, heater blower, etc.).


d.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G70-36 (IGR) - Body ground Ignition switch ON 8 to 16 V



e.

Turn the ignition switch off.


f.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G70-33 (E1) - Body ground Always Below 1 Ω
G70-32 (E2) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

12.CHECK VEHICLE TYPE

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

12.CHECK VEHICLE TYPE
a.

Check the vehicle type.


Result:
Result Proceed to
for 7 Inch Multi-information Display A
for 12.3 Inch Multi-information Display B



A

13.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)

B

14.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)
13.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)
a.
C406366C76
1.5,0.073 1.885,0.333 0.385,0.26 2.75,1.833 2.917,1.833 2.917,1.833 2.781,1.385 true 0.646,1.375 0.5,1.917 0.5,1.917 0.333,1.917 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.573,0.115 1.885,0.271 0.313,0.156 10 false G18 2.448,1.75 2.75,1.99 0.302,0.24 10 false IG+ 0.115,1.833 0.417,2.167 0.302,0.333 10 false ES
*a Front view of wire harness connector
(to Combination Meter Assembly)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G18-38 (IG+) - Body ground Ignition switch ON 10.5 to 16 V



b.

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


c.

Turn the ignition switch off.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G18-23 (ES) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

15.CHECK SRS WARNING LIGHT

NG

GO TO STOP AND START SYSTEM

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


14.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)
a.
B721709C01
1.5,0.073 1.885,0.333 0.385,0.26 2.698,0.865 2.865,0.333 2.865,0.333 3.031,0.333 true 0.948,0.885 0.771,0.417 0.771,0.417 0.604,0.417 true 0.115,0.083 0.427,0.24 0.313,0.156 10 false *a 1.531,0.115 2.063,0.323 0.531,0.208 10 false G151 3.094,0.219 3.396,0.458 0.302,0.24 10 false IG+ 0.365,0.323 0.667,0.656 0.302,0.333 10 false ES
*a Front view of wire harness connector
(to Combination Meter Assembly)


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

Standard Voltage:
for HV Model
Tester Connection Switch Condition Specified Condition
G151-6 (IG+) - Body ground Ignition switch ON 11 to 14 V

for Gasoline Model
Tester Connection Switch Condition Specified Condition
G151-6 (IG+) - Body ground Ignition switch ON 10.5 to 16 V



b.

Turn the ignition switch off.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G151-2 (ES) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG (for Gasoline Model)
NG (for HV Model)



OK

15.CHECK SRS WARNING LIGHT

NG (for Gasoline Model)

GO TO STOP AND START SYSTEM

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


NG (for HV Model)

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.CHECK SRS WARNING LIGHT
a.
C414927C01
0.74,1.51 1.052,1.708 0.313,0.198 10 false *1 2.677,1.625 2.99,1.823 0.313,0.198 10 false *2 1.698,0.823 2.01,1.021 0.313,0.198 10 false *3
*1 Combination Meter Assembly
*2 Airbag ECU Assembly
*3 Wire Harness


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


b.

Connect the G18*1 or G151*2 combination meter assembly connector.

*1: for 7 Inch Multi-information Display

*2: for 12.3 Inch Multi-information Display



c.

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


d.

Approximately 6 seconds after the ignition switch to ON, check the condition of the SRS warning light.


Result:
Proceed to
Turns off for 10 seconds, and then illuminates
Turns off for 10 seconds, and then remains off



Turns off for 10 seconds, and then illuminates

REPLACE AIRBAG ECU ASSEMBLY

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


Turns off for 10 seconds, and then remains off

REPLACE COMBINATION METER ASSEMBLY

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