Toyota Tundra (2015 year). Manual — part 975
A
The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as
.
PROCEDURE
1.
CHECK ILLUMINATION
(a) Check if the illumination for the radio and display receiver assembly, steering pad switch assembly,
glove box or other parts (hazard switch, transmission control switch, etc.) comes on when the light
control switch is turned to the head or tail position.
Result
RESULT
PROCEED
TO
Illumination comes on for all components except steering pad switch assembly
A
Illumination comes on for all components except radio and display receiver assembly
B
No illumination comes on (radio and display receiver assembly, hazard switch, glove box, etc.)
C
Illumination comes on for all components except steering pad switch assembly and radio and
display receiver assembly
D
B
GO TO STEP 6
C
GO TO LIGHTING SYSTEM
D
GO TO STEP 7
2.
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BATTERY)
(a) Disconnect the spiral cable sub-assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Illumination Circ...
OK
OK
OK
Standard Voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
J45-12 (IL+2) - Body ground Headlight dimmer switch assembly tail or head position
11 to 14 V
Text in Illustration
*a
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
3.
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
4.
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
5.
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY -
SPIRAL CABLE SUB-ASSEMBLY)
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Illumination Circ...
(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
J139-23 (SWG) - J45-3 (EAU)
Always
Below 1 Ω
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
6.
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY -
BATTERY)
(a) Disconnect the radio and display receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
J137-10 (ILL+) - Body ground Headlight dimmer switch assembly tail or head position 11 to 14 V
Text in Illustration
*a
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN
PROBLEM SYMPTOMS TABLE
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Illumination Circ...
7.
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY -
COMBINATION METER ASSEMBLY)
(a) Disconnect the J138 radio and display receiver assembly connector.
(b) Disconnect the J28 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
J138-5 (ILL-) - J28-22 (ILL-)
Always
Below 1 Ω
J138-5 (ILL-) - 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: Illumination Circ...
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