Toyota Tundra. Manual — part 616

a. Disconnect the U1 switch connector.

b. Apply battery voltage and check the operation of the power seat.

OK

FRONT SEAT ADJUSTER ASSEMBLY LH

Fig. 19: Inspecting Front Seat Adjuster Assembly LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 13

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (LEG SUPPORT ADJUSTMENT
SWITCH BATTERY AND BODY GROUND)

13. CHECK HARNESS AND CONNECTOR (LEG SUPPORT ADJUSTMENT SWITCH - LEG

SUPPORT MOTOR LH)

a. Disconnect the U1 switch connector.

Measurement Condition

Specified Condition

Battery positive (+) --> Terminal U1-4 (CSNF)

Battery negative (-) --> Terminal U1-1 (CSNR)

Leg support opens (A)

Battery negative (-) --> Terminal U1-4 (CSNF)

Battery positive (+) --> Terminal U1-1 (CSNR)

Leg support closes (B)

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

b. Disconnect the Z8 motor connector.

c. Measure the resistance according to the value(s) in the table below.

Standard resistance

LEG SUPPORT ADJUSTMENT SWITCH - LEG SUPPORT MOTOR LH

Fig. 20: Identifying Leg Support Adjustment Switch And Leg Support Motor Connector
Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH (see REMOVAL )

14. INSPECT FUSE (FR P/SEAT RH)

a. Remove the FR P/SEAT RH fuse from the main body ECU.

b. Measure the resistance according to the value(s) in the table below.

Tester Connection

Condition Specified Condition

U1-1 (CSNF) - Z8-1

Always

Below 1 ohms

U1-4 (CSNR) - Z8-2

U1-1 (CSNF) - Body ground

Always

10 kohms or higher

U1-4 (CSNR) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Standard resistance

FUSE (FR P/SEAT RH)

NG: REPLACE FUSE

OK: Go to next step

15. INSPECT FRONT POWER SEAT SWITCH RH

a. Remove the switch (see REMOVAL )

b. Measure the resistance according to the value(s) in the table below.

Standard resistance Slide switch

STANDARD RESISTANCE SLIDE SWITCH

Reclining switch

STANDARD RESISTANCE RECLINING SWITCH

Tester Connection Condition Specified Condition

FR P/SEAT RH fuse Always

Below 1 ohms

Tester Connection Switch Condition Specified Condition

2 (SLD+) -1 (B)

FRONT

Below 1 ohms

3 (SLD-) - 4 (E)

2 (SLD+) - 4 (E)

OFF

3 (SLD-) - 4 (E)

2 (SLD+) - 4 (E)

REAR

3 (SLD-) - 1 (B)

Tester Connection Switch Condition Specified Condition

8 (RCL+) - 1 (B)

FRONT

Below 1 ohms

10 (RCL-) - 4 (E)

8 (RCL+) - 4 (E)

OFF

10 (RCL-) - 4 (E)

8 (RCL+) - 4 (E)

REAR

10 (RCL-) - 1 (B)

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Fig. 21: Inspecting Front Power Seat Switch RH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE FRONT POWER SEAT SWITCH RH (see REMOVAL )

OK: Go to next step

16. INSPECT FRONT SEAT ADJUSTER ASSEMBLY RH

a. Disconnect the Y9 switch connector.

b. Apply battery voltage and check the operation of the power seat.

OK

FRONT SEAT ADJUSTER ASSEMBLY RH

Measurement Condition

Specified Condition

Battery positive (+) --> Terminal 2 (SLD+)

Battery negative (-) --> Terminal 3 (SLD-)

Seat slides forward (A)

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra