Toyota Tundra. Manual — part 512

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

2. INSPECT SPIRAL CABLE

a. Disconnect the z3 and J45 cable connectors.

Fig. 174: Identifying Z3 And J45 Cable Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

SPIRAL CABLE TESTER CONNECTION SPECIFIED CONDITION

Tester Connection

Condition

Specified

Condition

J45-4(EAU)-Z3-8(EAU)

Spiral cable is turned 2.5 rotations

counterclockwise

Spiral cable is centered

Spiral cable is turned 2.5 rotations clockwise

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY (See REMOVAL )

OK: Go to Next Step

3. INSPECT STEERING PAD SWITCH ASSEMBLY

Fig. 175: Identifying Steering Pad Switch Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Disconnect the z3 switch connector.

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

Standard resistance

STEERING PAD SWITCH ASSEMBLY

J45-5(AU2)-z3-9(AU2)

Spiral cable is turned 2.5 rotations

counterclockwise

Below 1 ohms

Spiral cable is centered

Spiral cable is turned 2.5 rotations clockwise

J45-6(AU1)-z3-10

(AU1)

Spiral cable is turned 2.5 rotations

counterclockwise

Spiral cable is centered

Spiral cable is turned 2.5 rotations clockwise

CAUTION: The spiral cable is an important part of the SRS airbag system.

Incorrect removal or installation of the spiral cable may prevent
the airbag from deploying. Be sure to read the PRECAUTION for
the supplemental restraint system (see PRECAUTION ).

Tester Connection

Switch Condition

Specified Condition

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

NG: REPLACE STEERING PAD SWITCH ASSEMBLY (See REMOVAL )

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE

ILLUMINATION CIRCUIT

DESCRIPTION

Power is supplied to the illumination circuit for the navigation receiver and steering pad switch when the light
control switch is in the TAIL or HEAD position.

WIRING DIAGRAM

9(AU2)-8(EAU)

No switch is pushed

100 kohms or higher

MODE switch pushed

Below 1 ohms

On Hook switch pushed

329 ohms

Off Hook switch pushed

1000 ohms

Voice switch is pushed

3110 ohms

10(AU1)-8(EAU)

No switch is pushed

100 kohms or higher

Seek+ switch pushed

Below 1 ohms

Seek- switch pushed

329 ohms

Volume+ switch is pushed

1000 ohms

Volume- switch is pushed

3110 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Fig. 176: Illumination Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK ILLUMINATION

a. Check if the illumination for the navigation receiver, steering pad switch, glove box light or other

parts (seat heater switch, room light switch, etc.) come on when the light control switch is turned to
the HEAD or TAIL position.

Result

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 ).

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra