DESCRIPTION
When the front power seat switch LH does not receive a sensor signal despite upward or downward movement of the seat by power seat motor operation, this DTC is stored.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2653 |
The upward and downward lock detection position of the sensor is the same. |
|
WIRING DIAGRAM
PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (POWER SEAT MOTOR FUNCTION) |
(a) Select the Active Test, use the Techstream to generate a control command,
and then check the power seat motor function (See page
).
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Lifter Operation |
Seat lifter operation |
Up / OFF / Down |
- |
OK:
Motor operates normally.
NG | ![]() |
GO TO STEP 5 |
|
2. |
CHECK FRONT POWER SEAT SWITCH LH (LIFTER MOTOR CIRCUIT) |
(a) Disconnect the b17 lifter motor connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
b17-2 (O/P) - b17-3 (GND) |
Lifter switch on |
4.8 to 5.1 V |
*a |
Front view of wire harness connector (to Separate Type Front Seat Cushion Spring Assembly LH [Lifter Motor]) |
NG | ![]() |
GO TO STEP 4 |
|
3. |
CHECK SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (LIFTER MOTOR) |
(a) Connect the b17 lifter motor connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
b17-2 (O/P) - Body ground |
Lifter switch on |
4.5 to 4.8 V |
*a |
Component with harness connected (Separate Type Front Seat Cushion Spring Assembly LH [Lifter Motor]) |
OK | ![]() |
REPLACE FRONT POWER SEAT SWITCH LH |
NG | ![]() |
REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (LIFTER MOTOR) |
4. |
CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - LIFTER MOTOR) |
(a) Disconnect the b19 front power seat switch LH connector.
(b) Disconnect the b17 lifter motor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
b19-4 (SSRL) - b17-2 (O/P) |
Always |
Below 1 Ω |
b19-1 (SGND) - b17-3 (GND) |
Always |
Below 1 Ω |
b19-4 (SSRL) - Body ground |
Always |
10 kΩ or higher |
b19-1 (SGND) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE FRONT POWER SEAT SWITCH LH |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
5. |
INSPECT SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (LIFTER MOTOR) |
(a) Remove the separate type front seat cushion spring assembly LH (lifter
motor) (See page |
|
(b) Disconnect the b17 lifter motor connector.
(c) Check if the seat cushion spring moves smoothly when the battery is connected to the lifter motor connector terminals.
OK:
Measurement Condition |
Operational Direction |
---|---|
Battery positive (+) → 1 (UP) Battery negative (-) → 4 (DOWN) |
Seat cushion spring moves upward |
Battery positive (+) → 4 (DOWN) Battery negative (-) → 1 (UP) |
Seat cushion spring moves downward |
*a |
Component without harness connected (Separate Type Front Seat Cushion Spring Assembly LH [Lifter Motor]) |
NG | ![]() |
REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (LIFTER MOTOR) |
|
6. |
CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - LIFTER MOTOR) |
(a) Disconnect the b18 front power seat switch LH connector.
(b) Disconnect the b17 lifter motor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
b18-10 (LFT+) - b17-1 (UP) |
Always |
Below 1 Ω |
b18-12 (LFT-) - b17-4 (DOWN) |
Always |
Below 1 Ω |
b18-10 (LFT+) - Body ground |
Always |
10 kΩ or higher |
b18-12 (LFT-) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE FRONT POWER SEAT SWITCH LH |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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