| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001QM5C |
| Model Year Start: 2021 | Model: RAV4 | Prod Date Range: [08/2020 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1653; Driver Side Seat Position Sensor; 2021 - 2024 MY RAV4 RAV4 HV [08/2020 - ] | ||
|
DTC |
B1653 |
Driver Side Seat Position Sensor |
DESCRIPTION
The front seat adjuster assembly LH (seat position airbag sensor) circuit consists of the airbag ECU assembly and front seat adjuster assembly LH (seat position airbag sensor).
DTC B1653 is stored when a malfunction is detected in the front seat adjuster assembly LH (seat position airbag sensor) circuit.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Test Mode / Check Mode |
|---|---|---|---|---|---|
|
B1653 |
Driver Side Seat Position Sensor |
One of the following conditions is met:
|
|
Comes on |
Not applicable |
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
![2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; 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
PROCEDURE
|
1. |
CHECK CONNECTION OF 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 airbag ECU assembly and front seat adjuster assembly LH (seat position airbag sensor).
| Connectors are not properly connected |
|
CONNECT CONNECTORS PROPERLY |
|
|
2. |
CHECK CONNECTORS |
|
(a) Disconnect the connectors from the airbag ECU assembly and front seat adjuster assembly LH (seat position airbag sensor). |
|
(b) Check that the connectors (on the airbag ECU assembly side and front seat adjuster assembly LH (seat position airbag sensor) side) are not damaged.
| Connectors are deformed or damaged |
|
REPLACE FLOOR WIRE OR FRONT SEAT INNER BELT ASSEMBLY LH |
|
|
3. |
CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (SEAT POSITION AIRBAG SENSOR) CIRCUIT |
|
(a) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
z18-1 - Body ground |
Ignition switch ON |
Below 1 V |
|
z18-2 - Body ground |
Ignition switch ON |
Below 1 V |
(d) Turn the ignition switch off.
(e) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(f) Using a service wire, connect terminals 26 (LSP-) and 25 (LSP+) of connector B.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
z18-1 - z18-2 |
Always |
Below 1 Ω |
(h) Disconnect the service wire from connector B.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
z18-1 - z18-2 |
Always |
1 MΩ or higher |
|
z18-1 - Body ground |
Always |
1 MΩ or higher |
|
z18-2 - Body ground |
Always |
1 MΩ or higher |
| NG |
|
|
|
4. |
CHECK DTC |
|
(a) Connect the connectors to the airbag ECU assembly and front seat adjuster assembly LH (seat position airbag sensor). |
|
(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 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 B1653 may be output at this time, but they are not related to this check.
| DTC B1653 is not output |
|
|
|
5. |
REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH (SEAT POSITION AIRBAG SENSOR) |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
(c) Replace the front seat adjuster assembly LH (seat position airbag sensor).
for Manual Seat:
Click here
for Power Seat:
Click here
HINT:
Perform the inspection using parts from a normal vehicle if possible.
|
|
6. |
CHECK DTC |
|
(a) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds. |
|
(b) Turn the ignition switch to ON, and wait for at least 60 seconds.
(c) Clear the DTCs in memory.
Click here
Body Electrical > SRS Airbag > Clear DTCs
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON, and wait for at least 60 seconds.
(f) Check for DTCs.
Click here
Body Electrical > SRS Airbag > Trouble Codes
HINT:
Codes other than DTC B1653 may be output at this time, but they are not related to this check.
| DTC B1653 is not output |
|
END (FRONT SEAT ADJUSTER ASSEMBLY LH [SEAT POSITION AIRBAG SENSOR] WAS DEFECTIVE) |
| DTC B1653 is output |
|
REPLACE AIRBAG ECU ASSEMBLY
|
|
7. |
INSPECT FRONT SEAT INNER BELT ASSEMBLY LH |
(a) Remove the front seat inner belt assembly LH.
for Manual Seat:
Click here
for Power Seat:
Click here
(b) Inspect the front seat inner belt assembly LH.
for Manual Seat:
Click here
for Power Seat:
Click here
| OK |
|
REPLACE FLOOR WIRE |
| NG |
|
REPLACE FRONT SEAT INNER BELT ASSEMBLY LH for Manual Seat: Click here
for Power Seat: Click here
|
|
|