Toyota Tundra. Manual — part 511

diagram below will not operate normally.

WIRING DIAGRAM

Fig. 170: Vehicle Speed Signal Circuit between Navigation Receiver Assembly and Combination Meter -
Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK OPERATION OF SPEEDOMETER

a. Drive the vehicle and check if the function of the speedometer in the combination meter is normal.

OK: Actual vehicle speed and the speed indicated on the speedometer are the same.

HINT:

The vehicle speed sensor is functioning normally when the indication on the speedometer is
normal.

NG: Go TO METER / GAUGE SYSTEM (See PROBLEM SYMPTOMS TABLE )

OK: Go to Next Step

2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMBINATION

METER)

a. Disconnect the K6 receiver connector.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Fig. 171: Identifying K6 Receiver Connector And J28 Meter Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Disconnect the J28 meter connector.

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

Standard resistance

HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMBINATION METER)
TESTER CONNECTION SPECIFIED CONDITION

Result

HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMBINATION METER)
RESULT CHART

B: REPLACE NAVIGATION RECEIVER (see REMOVAL (For Floor Shift Type) )

Tester Connection

Condition Specified Condition

K6-3 (SPD) - J28-35 (+S)

Always

Below 1 ohms

K6-3 (SPD) - Body ground Always

10 kohms or higher

Result

Proceed to

OK (for Column Shift Type)

A

OK (for Floor Shift Type)

B

NG

C

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

C: REPAIR OR REPLACE HARNESS OR CONNECTOR

A: REPLACE NAVIGATION RECEIVER (see REMOVAL (For Column Shift Type) )

STEERING PAD SWITCH CIRCUIT

DESCRIPTION

This circuit sends an operation signal from the steering pad switch to the navigation receiver. If there is an open
in the circuit, the navigation system cannot be operated using the steering pad switch. If there is a short in the
circuit, the resulting condition is the same as if the switch were continuously depressed. Therefore, the
navigation system cannot be operated using the steering pad switch, and the navigation system itself cannot
function.

WIRING DIAGRAM

Fig. 172: Steering Pad Switch Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

1. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - SPIRAL CABLE)

a. Disconnect the K21 receiver connector.

Fig. 173: Identifying K21 Receiver Connector And J45 Cable Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Disconnect the J45 cable connector.

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

Standard resistance

HARNESS AND CONNECTOR (NAVIGATION RECEIVER - SPIRAL CABLE) TESTER
CONNECTION SPECIFIED CONDITION

CAUTION: The vehicle is equipped with an SRS (Supplemental Restraint System)

which includes components such as airbags. Before servicing (including
removal or installation of parts), be sure to read the PRECAUTION in the
Supplemental Restraint System (see PRECAUTION ).

Tester Connection

Condition Specified Condition

K21-8(SW2)-J45-5 (AU2)

Always

Below 1 ohms

K21-6(SWG)-J45-4 (EAU)

K21-7(SW1)-J45-6 (AU1)

K21-8(SW2)-Body ground

Always

10 kohms or higher

K21-6 (SWG)-Body ground

K21-7(SW1)-Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra