Toyota Sequoia (2005). Manual - part 265

F19172

Tire Pressure
Monitor ECU

IG

GND

T17

11

Sub J/B No. 3

B–R

1F

I18
Ignition SW

2

AM1

4

Battery

T17

2

8

3A

A

A

J37
J/C

B–R

IG1

1

Instrument Panel J/B

ECU–IG

1

2

T17

T17

T17

GND2

RDA

RF5V

GND

RDA

+5V

1

4

5

T19 Tire Pressure
Monitor Receiver

BR–R

V

L

BD2

BD2

BD2

5

B–R

W–L

8

7

16

J30

H

J30

I

J30

J

J29

A

J29

B

J29

C

BR–R

V

L

BR–R

V

L

8

3C

1C

4

B–Y

1L

1

Instrument Panel J/B

AM1

1C

6

W

ALT

F10
Fusible Link Block

Instrument Panel J/B

1F

10

1H

1

W–B

W–B

A

J8
J/C

IE

4

3

J/C

5

8

B

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

DI–855

1049

WIRING DIAGRAM

F19137

Tire Pressure Monitor Receiver Assy:

T19

+5V

GND

DI–856

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

1050

INSPECTION PROCEDURE

NOTICE:
It is necessary to register an ID code after replacing the tire pressure monitor valve sub–assy and/or
the tire pressure monitor ECU (see page 

DI–805

).

HINT:
Set the tire pressure to the specified value.

1

Inspect tire pressure monitor receiver assy.

PREPARATION:
(a)

Disconnect the tire pressure monitor receiver assy T19
connector.

(b)

Turn the ignition switch to the ON position.

CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Tester Connection

Condition

Specified Condition

T19–4 (GND) – 

T19–5 (+5V)

Ignition Switch ON

4.5 to 5.5 V

NG

Go to step 3.

OK

F19136

Tire Pressure Monitor ECU:

T17

RDA

F19137

Tire Pressure Monitor Receiver Assy:

T19

RDA

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

DI–857

1051

2

Check harness and connector (Tire pressure monitor receiver assy – Tire pres-
sure monitor ECU).

PREPARATION:
Disconnect the tire pressure monitor receiver assy T19 connec-
tor and tire pressure monitor ECU T17 connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

T17–7 (RDA) – T19–1 (RDA)

Below 1 

Ω

OK

Go to step 5.

NG

F19136

Tire Pressure Monitor ECU:

T17

RF5V

GND2

RDA

F19137

Tire Pressure Monitor Receiver Assy:

T19

+5V

GND

RDA

DI–858

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

1052

3

Check harness and connector (Tire pressure monitor receiver assy – Tire pres-
sure monitor ECU).

PREPARATION:
Disconnect the tire pressure monitor receiver assy T19 connec-
tor and tire pressure monitor ECU T17 connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

T17–7 (RDA) – T19–1 (RDA)

Below 1 

Ω

T17–8 (RF5V) – T19–5 (+5V)

Below 1 

Ω

T17–16 (GND2) – T19–4 (GND)

Below 1 

Ω

T17–7 (RDA) – Body ground

10 k

Ω

 or higher

T17–8 (RF5V) – Body ground

10 k

Ω

 or higher

T17–16 (GND2) – Body ground

10 k

Ω

 or higher

NG

Repair or replace harness or connector.

OK

4

Check power source circuit (See page 

DI–878

).

NG

Repair or replace power source circuit.

OK

5

Replace tire pressure monitor receiver assy (See page 

SA–13

).

HINT:
Perform the inspection using parts from a normal vehicle when possible.

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