| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001HIAQ |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [02/2019 - 08/2020] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): B1875-B1878; Short in Passenger Side Front Seat Cushion Squib Circuit; 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020] | ||
|
DTC |
B1875 |
Short in Passenger Side Front Seat Cushion Squib Circuit |
|
DTC |
B1876 |
Open in Passenger Side Front Seat Cushion Squib Circuit |
|
DTC |
B1877 |
Short to GND in Passenger Side Front Seat Cushion Squib Circuit |
|
DTC |
B1878 |
Short to B+ in Passenger Side Front Seat Cushion Squib Circuit |
DESCRIPTION
The front seat cushion squib RH circuit consists of the airbag ECU assembly and the front seat cushion airbag assembly RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the front seat cushion squib RH circuit.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Test Mode / Check Mode |
|---|---|---|---|---|---|
|
B1875 |
Short in Passenger Side Front Seat Cushion Squib Circuit |
One of the following conditions is met:
|
|
Comes on |
Comes on |
|
B1876 |
Open in Passenger Side Front Seat Cushion Squib Circuit |
One of the following conditions is met:
|
|
Comes on |
Comes on |
|
B1877 |
Short to GND in Passenger Side Front Seat Cushion Squib Circuit |
One of the following conditions is met:
|
|
Comes on |
Comes on |
|
B1878 |
Short to B+ in Passenger Side Front Seat Cushion Squib Circuit |
One of the following conditions is met:
|
|
Comes on |
Comes on |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.
Click here
![2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION](/t3Portal/stylegraphics/info.gif)
-
When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.
Click here
-
After replacing the airbag ECU assembly, refer to initialization.
Click here
HINT:
To perform the simulation method, enter check mode (signal check) with the Techstream (Click here
), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (Click here
).
PROCEDURE
|
1. |
CHECK CONNECTORS |
|
(a) Turn the ignition switch off. |
|
(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the front seat cushion airbag assembly RH and airbag ECU assembly.
OK:
The connectors are properly connected.
HINT:
If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.
(d) Disconnect the connectors from the front seat cushion airbag assembly RH and airbag ECU assembly.
(e) Check that the terminals of the connectors are not deformed or damaged.
OK:
The terminals are not deformed or damaged.
(f) Check that the short springs of the activation prevention mechanism of the floor wire connector are not deformed or damaged.
OK:
The short springs are not deformed or damaged.
| NG |
|
REPLACE FLOOR WIRE |
|
|
2. |
CHECK FRONT SEAT CUSHION AIRBAG ASSEMBLY RH |
|
(a) Connect the connector to the airbag ECU assembly. |
|
(b) Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.
CAUTION:
Never connect the tester to the front seat cushion airbag assembly RH 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
(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.
Click here
Body Electrical > SRS Airbag > Clear DTCs
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check for DTCs.
Click here
Body Electrical > SRS Airbag > Trouble Codes
HINT:
Codes other than DTC B1875, B1876, B1877 and B1878 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 90 seconds.
(k) Disconnect SST from connector C.
| DTCs B1875, B1876, B1877 and B1878 are not output |
|
REPLACE FRONT SEAT CUSHION AIRBAG ASSEMBLY RH
|
|
|
3. |
CHECK FLOOR WIRE |
(a) Disconnect the floor wire from the airbag ECU assembly.
|
*1 |
Front Seat Cushion Airbag Assembly RH |
|
*2 |
Airbag ECU Assembly |
|
*3 |
Floor Wire |
|
*a |
Front view of wire harness connector (to Front Seat Cushion Airbag Assembly RH) |
|
Release the activation prevention mechanism |
(b) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
(2) Turn the ignition switch to ON.
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
M19-2 (FCP+) - Body ground |
Ignition switch ON |
Below 1 V |
|
M19-1 (FCP-) - Body ground |
Ignition switch ON |
Below 1 V |
(4) Turn the ignition switch off.
(5) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(c) Check for an open in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M19-2 (FCP+) - M19-1 (FCP-) |
Always |
Below 1 Ω |
(d) Check for a short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M19-2 (FCP+) - Body ground |
Always |
1 MΩ or higher |
|
M19-1 (FCP-) - Body ground |
Always |
1 MΩ or higher |
(e) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B.
Click here
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M19-2 (FCP+) - M19-1 (FCP-) |
Always |
1 MΩ or higher |
(3) Restore the released activation prevention mechanism of connector B to the original condition.
| NG |
|
REPLACE FLOOR WIRE |
|
|
4. |
CHECK DTC |
|
(a) Connect the connectors to the front seat cushion airbag assembly RH and airbag ECU assembly. |
|
(b) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Clear the DTCs stored in memory.
Click here
Body Electrical > SRS Airbag > Clear DTCs
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs.
Click here
Body Electrical > SRS Airbag > Trouble Codes
HINT:
Codes other than DTC B1875, B1876, B1877 and B1878 may be output at this time, but they are not related to this check.
| DTCs B1875, B1876, B1877 and B1878 are not output |
|
| DTC B1875, B1876, B1877 or B1878 is output |
|
REPLACE AIRBAG ECU ASSEMBLY
|
|
|