Toyota Tundra. Manual — part 613

Fig. 10: Front Power Seat Switch - Wiring Diagram (Driver Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Fig. 11: Front Power Seat Switch - Wiring Diagram (Passenger Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK SEAT OPERATION

a. Operate the power seat switch and check that the front power seat operates.

Result

SEAT OPERATION

Result

Proceed to

Driver side power seat does not operate

A

Driver side lumbar does not operate

B

Driver side leg support does not operate

C

Passenger side power seat does not operate

D

Passenger side lumbar does not operate

E

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

B: Go to step 6

C: Go to step 10

D: Go to step 14

E: Go to step 18

A: Go to next step

2. INSPECT FUSE (ECU-B1, ECU-IG No. 1, FR P/SEAT)

a. Remove the ECU-B1 fuse from the engine room relay block.

b. Remove the FR P/SEAT LH and ECU-IG No. 1 fuses from the main body ECU.

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

Standard resistance

FUSE (ECU-B1, ECU-IG NO. 1, FR P/SEAT)

NG: REPLACE FUSE

OK: Go to next step

3. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - BATTERY

AND BODY GROUND)

a. Disconnect the Z9 and Z10 switch connectors.

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

Standard voltage

FRONT POWER SEAT SWITCH LH - BATTERY AND BODY GROUND VOLTAGE
SPECIFICATION

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

Tester Connection Condition Specified Condition

ECU-B1 fuse

Always

Below 1 ohms

ECU-IG No. 1 fuse

FR P/SEAT LH fuse

Tester Connection

Switch Condition Specified Condition

Z9-5 (+B) - Body ground

Always

11 to 14 V

Z10-4 (IG) - Body ground

Ignition switch OFF

Below 1 V

Ignition switch ON

11 to 14 V

Z10-8 (SYSB) - Body ground

Always

11 to 14 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Standard resistance

FRONT POWER SEAT SWITCH LH - BATTERY AND BODY GROUND RESISTANCE
SPECIFICATION

Fig. 12: Identifying Front Power Seat Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

4. INSPECT FRONT SEAT ADJUSTER ASSEMBLY LH

a. Disconnect the Z9 switch connector.

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

OK

FRONT SEAT ADJUSTER ASSEMBLY LH

Tester Connection

Condition Specified Condition

Z9-1 (GND) - Body ground Always

Below 1 ohms

Measurement Condition

Specified Condition

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra