Toyota Tundra (2015 year). Manual — part 974
Last Modified: 9-16-2014
6.6 J
Doc ID: RM0000012CK0S5X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Steering Pad Switch Circuit; 2015 MY Tundra [08/2014 -
]
Steering Pad Switch Circuit
DESCRIPTION
This circuit sends an operation signal from the steering pad switch assembly to the radio and display receiver
assembly.
If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly.
If there is a short in the circuit, the same condition as when the switch is continuously depressed occurs.
Therefore, the radio and display receiver assembly cannot be operated using the steering pad switch assembly,
and the radio and display receiver assembly itself cannot function.
WIRING DIAGRAM
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Steering Pad Swi...
INSPECTION PROCEDURE
CAUTION:
The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as
.
PROCEDURE
1.
INSPECT STEERING PAD SWITCH ASSEMBLY
(a) Remove the steering pad switch assembly
.
(b) Inspect the steering pad switch assembly
.
NG
REPLACE STEERING PAD SWITCH ASSEMBLY
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Steering Pad Swi...
OK
OK
2.
INSPECT SPIRAL CABLE SUB-ASSEMBLY
(a) Remove the spiral cable sub-assembly
.
(b) Inspect the spiral cable sub-assembly
.
NG
REPLACE SPIRAL CABLE SUB-ASSEMBLY
3.
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY -
SPIRAL CABLE SUB-ASSEMBLY)
(a) Disconnect the J139 radio and display receiver assembly connector.
(b) Disconnect the J45 spiral cable sub-assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
J139-21 (SW1) - J45-6 (AU1)
Always
Below 1 Ω
J139-22 (SW2) - J45-5 (AU2)
Always
Below 1 Ω
J139-24 (SW3) - J45-4 (AU3)
Always
Below 1 Ω
J139-23 (SWG) - J45-3 (EAU)
Always
Below 1 Ω
J139-21 (SW1) - Body ground
Always
10 kΩ or higher
J139-22 (SW2) - Body ground
Always
10 kΩ or higher
J139-24 (SW3) - Body ground
Always
10 kΩ or higher
J139-23 (SWG) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN
PROBLEM SYMPTOMS TABLE
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Steering Pad Swi...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM0000012CG0X2X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Illumination Circuit; 2015 MY Tundra [08/2014 - ]
Illumination Circuit
DESCRIPTION
Power is supplied to the radio and display receiver assembly and steering pad switch assembly illumination when
the headlight dimmer switch assembly is in the tail or head position.
WIRING DIAGRAM
INSPECTION PROCEDURE
CAUTION:
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Illumination Circ...
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