DESCRIPTION
When the position control ECU and switch assembly does not receive a sensor signal
despite upward or downward movement of the seat by power seat motor operation, this
DTC is stored.
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DTC Code
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DTC Detection Condition
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Trouble Area
|
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B2652
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The upward and downward lock detection position of the sensor is the
same.
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- Position control ECU and switch assembly
- Front seat cushion frame sub-assembly LH (vertical motor)
- Harness or connector
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WIRING DIAGRAM
PROCEDURE
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1.
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PERFORM ACTIVE TEST USING TECHSTREAM (FRONT VERTICAL OPERATION)
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(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Driver Seat
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Tester Display
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Test Part
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Control Range
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Diagnostic Note
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Front Vertical Operation
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Seat front vertical operation
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Up / OFF / Down
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-
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OK:
Motor operates normally.
| NG |
 |
GO TO STEP 5
|
| OK |
|
|
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2.
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CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (VERTICAL MOTOR CIRCUIT)
|
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(a) Disconnect the front seat cushion frame sub-assembly LH (vertical
motor) connector.
|
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(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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Tester Connection
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Switch Condition
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Specified Condition
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Z14-1 - Z14-2
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Front vertical switch on
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4.8 to 5.1 V
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Text in Illustration
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*a
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Front view of wire harness connector
(to Front Seat Cushion Frame Sub-assembly LH [Vertical Motor])
|
| NG |
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GO TO STEP 4
|
| OK |
|
|
|
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3.
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CHECK FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH (VERTICAL MOTOR)
|
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(a) Reconnect the front seat cushion frame sub-assembly LH (vertical
motor) connector.
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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Tester Connection
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Switch Condition
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Specified Condition
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|
Z14-2 - Body ground
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Front vertical switch on
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4.5 to 4.8 V
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Text in Illustration
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*a
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Component with harness connected
(Front Seat Cushion Frame Sub-assembly LH [Vertical Motor])
|
| OK |
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REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY
|
| NG |
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REPLACE FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH
|
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4.
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CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY
- FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH)
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(a) Disconnect the Z10 position control ECU and switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
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Tester Connection
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Condition
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Specified Condition
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Z10-3 (SSFV) - Z14-2
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Always
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Below 1 Ω
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Z10-1 (SGND) - Z14-1
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Always
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Below 1 Ω
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Z10-3 (SSFV) or Z14-2 - Body ground
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Always
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10 kΩ or higher
|
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Z10-1 (SGND) or Z14-1 - Body ground
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Always
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10 kΩ or higher
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| OK |
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REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY
|
| NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
|
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5.
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INSPECT FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH (VERTICAL MOTOR)
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(a) Remove the front seat cushion frame sub-assembly LH (vertical motor) (See
page  ).
(b) Inspect the front seat cushion frame sub-assembly LH (vertical motor) (See
page ).
| NG |
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REPLACE FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH
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| OK |
|
|
|
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6.
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CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY
- FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH)
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(a) Disconnect the Z9 position control ECU and switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
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Tester Connection
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Condition
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Specified Condition
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Z9-8 (FRV+) - Z5-2
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Always
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Below 1 Ω
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Z9-5 (FRV-) - Z5-1
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Always
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Below 1 Ω
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Z9-8 (FRV+) or Z5-2 - Body ground
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Always
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10 kΩ or higher
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Z9-5 (FRV-) or Z5-1 - Body ground
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Always
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10 kΩ or higher
|
| OK |
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REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY
|
| NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
|
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