Toyota Tundra (2015 year). Manual — part 2458
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000003S3L033X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): B2653; Lifter Sensor Malfunction; 2015 MY
Tundra [08/2014 - ]
DTC
B2653
Lifter Sensor Malfunction
DESCRIPTION
When the position control ECU and switch assembly does not receive a sensor signal despite upward or downward
CODE
DTC DETECTION CONDITION
TROUBLE AREA
B2653
The upward and downward lock detection position
assembly
Front seat cushion frame sub-assembly
RH (lifter motor)
Harness or connector
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1.
PERFORM ACTIVE TEST USING TECHSTREAM (LIFTER OPERATION)
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): B265...
OK
(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
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 POSITION CONTROL ECU AND SWITCH ASSEMBLY (LIFTER MOTOR CIRCUIT)
(a) Disconnect the front seat cushion frame sub-assembly LH
(lifter motor) connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
Z4-3 - Z4-4
Lifter switch on
4.8 to 5.1 V
Text in Illustration
*a
NG
GO TO STEP 4
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): B265...
OK
3.
CHECK FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH (LIFTER MOTOR)
(a) Reconnect the front seat cushion frame sub-assembly LH
(lifter motor) connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
Z4-4 - Body ground
Lifter switch on
4.5 to 4.8 V
Text in Illustration
*a
Component with harness connected
(Front Seat Cushion Frame Sub-assembly LH [Lifter Motor])
NG
REPLACE FRONT SEAT CUSHION FRAME
SUB-ASSEMBLY LH
OK
REPLACE POSITION CONTROL ECU AND SWITCH
ASSEMBLY
4.
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH
ASSEMBLY - FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH)
(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:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Z10-4 (SSRL) - Z4-4
Always
Below 1 Ω
Z10-1 (SGND) - Z4-3
Always
Below 1 Ω
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): B265...
OK
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Z10-4 (SSRL) or Z4-4 - Body ground
Always
10 kΩ or higher
Z10-1 (SGND) or Z4-3 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE POSITION CONTROL ECU AND SWITCH
ASSEMBLY
5.
INSPECT FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH (LIFTER MOTOR)
(a) Remove the front seat cushion frame sub-assembly LH (lifter motor)
.
(b) Inspect the front seat cushion frame sub-assembly LH (lifter motor)
.
NG
REPLACE FRONT SEAT CUSHION FRAME
SUB-ASSEMBLY LH
6.
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH
ASSEMBLY - FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH)
(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:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Z9-10 (LFT+) - Z4-1
Always
Below 1 Ω
Z9-12 (LFT-) - Z4-2
Always
Below 1 Ω
Z9-10 (LFT+) or Z4-1 - Body ground
Always
10 kΩ or higher
Z9-12 (LFT-) or Z4-2 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE POSITION CONTROL ECU AND SWITCH
ASSEMBLY
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): B265...
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