Toyota Tundra. Manual — part 696

9. INSTALL SLIDE AND VERTICAL POWER SEAT SWITCH KNOB LH (see REASSEMBLY )

10. INSTALL FRONT SEAT ASSEMBLY LH

a. Install the front seat (see INSTALLATION ).

SEAT HEATER CONTROL (W/ SEAT HEATER SYSTEM)

ON-VEHICLE INSPECTION

1. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH

a. Disconnect the Z11 connector.

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

Standard resistance

SEAT HEATER CONTROL SUB-ASSEMBLY LH RESISTANCE SPECIFICATION
DISCONNECT

Fig. 599: Identifying Seat Heater Control Connector Terminals (LH)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the result is not as specified, there may be a malfunction on the wire harness side.

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

Standard voltage

SEAT HEATER CONTROL SUB-ASSEMBLY LH VOLTAGE SPECIFICATION
DISCONNECT

Tester Connection

Specified Condition

Z11-6 (E) - Body ground

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

If the result is not as specified, there may be a malfunction on the wire harness side.

d. Connect the Z11 connector.

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

Standard voltage

SEAT HEATER CONTROL SUB-ASSEMBLY LH VOLTAGE SPECIFICATION
CONNECT

If the result is not as specified, the seat heater control may have a malfunction.

Fig. 600: Identifying Seat Heater Control Connector Terminals (LH)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY RH

a. Disconnect the Y8 connector.

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

Standard resistance

SEAT HEATER CONTROL SUB-ASSEMBLY RH RESISTANCE SPECIFICATION
DISCONNECT

Tester Connection

Switch Condition

Specified Condition

Z11-1 (SWL) - Z11-6(E)

Ignition switch ON, seat heater switch OFF

Below 1 V

Ignition switch ON, seat heater switch ON

11 to 14 V

Z11-4(B) - Z11-6(E)

Ignition switch OFF

Below 1 V

Ignition switch ON

11 to 14 V

Tester Connection

Switch Condition

Specified Condition

Z11-5 (THL) - Body

ground

Ignition switch ON, seat heater switch

ON, volume MIN --> MAX

Gradual increase between below

1 V and 11 to 14 V

Tester Connection

Specified Condition

Y8-6 (E) - Body ground

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

If the result is not as specified, there may be a malfunction on the wire harness side.

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

Fig. 601: Identifying Seat Heater Control Connector Terminals (RH)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard voltage

SEAT HEATER CONTROL SUB-ASSEMBLY RH VOLTAGE SPECIFICATION
DISCONNECT

If the result is not as specified, there may be a malfunction on the wire harness side.

d. Connect the Y8 connector.

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

Standard voltage

SEAT HEATER CONTROL SUB-ASSEMBLY RH VOLTAGE SPECIFICATION
CONNECT

Tester Connection

Switch Condition

Specified Condition

Y8-1 (SWL) - Y8-6 (E)

Ignition switch ON, seat heater switch OFF

Below 1 V

Ignition switch ON, seat heater switch ON

11 to 14 V

Y8-4(B1) - Y8-6(E)

Ignition switch OFF

Below 1 V

Ignition switch ON

11 to 14 V

Tester Connection

Condition

Specified Condition

Y8-5 (THL) - Body

ground

Ignition switch ON, seat heater switch

ON, volume MIN --> MAX

Gradual increase between below 1

V and 11 to 14 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

If the result is not as specified, the seat heater control may have a malfunction.

Fig. 602: Identifying Seat Heater Control Connector Terminals (RH)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra