Toyota Tundra (2015 year). Manual — part 118
OK
(a) Check the output waveform.
(1) Remove the combination meter assembly with the
connector(s) still connected.
(2) Connect an oscilloscope to terminal J28-29 (+S) and body
ground.
(3) Turn the ignition switch to ON.
(4) Turn a wheel slowly.
(5) Check the signal waveform according to the condition(s) in
the table below.
ITEM
CONDITION
Measurement terminal
J28-29 (+S) - Body ground
Tool setting
5 V/DIV., 20 ms./DIV.
Vehicle condition
Wheel being rotated
OK:
The waveform is similar to that shown in the illustration.
HINT:
When the system is functioning normally, one wheel revolution
generates 4 pulses. As the vehicle speed increases, the width
indicated by (A) in the illustration narrows.
Text in Illustration
*a
Component with harness connected
(Combination Meter Assembly)
NG
GO TO METER / GAUGE SYSTEM
2.
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY -
COMBINATION METER ASSEMBLY)
(a) Disconnect the J141 stereo component amplifier 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:
NAVIGATION: NAVIGATION SYSTEM: Vehicle Speed Signal Circuit ...
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
J141-11 (SPD) - J28-29 (+S)
Always
Below 1 Ω
J141-11 (SPD) - 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
NAVIGATION: NAVIGATION SYSTEM: Vehicle Speed Signal Circuit ...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000003YLU03CX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: NAVIGATION: NAVIGATION SYSTEM: Reverse Signal Circuit; 2015 MY Tundra [08/2014 - ]
Reverse Signal Circuit
DESCRIPTION
The navigation receiver assembly receives a reverse signal from the park/neutral position switch assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1.
CHECK VEHICLE SIGNAL (OPERATION CHECK)
(a) Enter the "Vehicle Signal Check Mode" screen. [Refer to check
Vehicle Signal in Operation Check
].
(b) Check that the display changes between ON and OFF according to the shift lever position.
OK:
NAVIGATION: NAVIGATION SYSTEM: Reverse Signal Circuit; 201...
SHIFT LEVER POSITION
DISPLAY
R
ON
Except R
OFF
HINT:
This display is updated once per second. As a result, it is normal for the display to lag behind the actual
shift lever position.
NG
GO TO STEP 2
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN
PROBLEM SYMPTOMS TABLE
2.
CHECK NAVIGATION RECEIVER ASSEMBLY
(a) Disconnect the navigation receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table
below.
Standard Voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED
CONDITION
J135-2 (REV) - Body
ground
Ignition switch ON, shift
lever in R
7.5 to 14 V
J135-2 (REV) - Body
ground
Ignition switch ON, shift
lever not in R
Below 1 V
Text in Illustration
*a
Result
RESULT
PROCEED TO
OK (for Column Shift Type)
A
OK (for Floor Shift Type)
B
NG
C
B
REPLACE NAVIGATION RECEIVER ASSEMBLY
C
GO TO STEP 3
NAVIGATION: NAVIGATION SYSTEM: Reverse Signal Circuit; 201...
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