Toyota Tundra Service Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT TRAILER BRAKE CONTROL SWITCH

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

8 (SRF) -5 (SRRT)

-

2 kΩ to 3.09 kΩ

8 (SRF) -16 (SRW1)

Manual trailer brake output slider operated to maximum position (100%)

Below 1 kΩ

Manual trailer brake output slider not operated (0%)

2 kΩ to 3 kΩ

8 (SRF) -14 (SRW2)

Manual trailer brake output slider operated to maximum position (100%)

2 kΩ to 3 kΩ

Manual trailer brake output slider not operated (0%)

Below 1 kΩ

8 (SRF) -15 (SRR)

-

12 Ω to 14 Ω

4 (GA+) -6 (GND)

GAIN (+) selection button pressed

Below 20 Ω

GAIN (+) selection button not pressed

100 kΩ or higher

4 (GA-) -6 (GND)

GAIN (-) selection button pressed

Below 20 Ω

GAIN (-) selection button not pressed

100 kΩ or higher

If the result is not as specified, replace the trailer brake control switch.

*a

Component without harness connected

(Trailer brake control switch)

*b

GAIN (+) selection button

*c

GAIN (-) selection button

*d

Manual trailer brake output slider

(b) Check that the LED illuminates.

(1) Apply battery voltage between the terminals of the trailer brake control switch, and check the illumination condition.

OK:

Measurement Condition

Switch Condition

Battery positive (+) →3 (TAIL)

Battery negative (-) → 1 (ILL-)

Illuminates

If the result is not as specified, replace the trailer brake control switch.

*a

Component without harness connected

(Trailer brake control switch)

*b

Indicator

    Components

    Installation

    See More:

    Toyota Tundra Owners Manual > Adjusting the seats: Front seats
    Adjustment procedure (separated type seats) ■ Driver's seat Seat position adjustment switch Seatback angle adjustment switch Seat cushion length adjustment switch (if equipped) Seat cushion (front) angle adjustment switch Seat vertical height adjustment switch Seat lumbar support adjustment switch ...

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    Toyota Tundra Service Manual

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