Toyota Sequoia (2005). Manual - part 267

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

DI–863

1057

7

Check tire pressure warning lamp.

PREPARATION:
(a)

Turn the ignition switch to the ON position.

(b)

Enter TEST MODE (see page 

DI–810

).

(c)

Press the tire pressure warning reset switch for 1 second or more after switching to TEST MODE.

CHECK:
Does the tire pressure warning lamp come on while pressing the tire pressure warning reset switch?
RESULT:

Comes on

A

Does not come on

B

B

Go to step 14.

A

DI–864

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

1058

8

Check tire pressure warning lamp.

HINT:
Check all tires, including the spare, one at a time in this order: FR, FL, RR RL, Spare.
PREPARATION:
(a)

Turn the ignition switch to the ON position.

(b)

Rapidly reduce the pressure of the tires to approximately 120 kPa (1.2 kgf/cm

2

, 35 psi).

(c)

Check that the tire pressure warning lamp comes on for 1 second while rapidly reducing the pressure
or immediately after reducing the pressure.

(d)

Note the check results.

(e)

Set the tire pressure to the specified value.

CHECK:
Check that the tire pressure warning lamp comes on when each of the wheels is inspected.
RESULT:

Does not come on (All wheels)

A

Does not come on (Some wheels)

B

Comes on (All wheels)

C

B

Replace tire pressure monitor receiver assy
(See page 

SA–13

).

HINT:
Replace the tire pressure monitor valve sub–assy for which the
tire pressure warning lamp did not come on during inspection.

C

Perform initialization (See page 

DI–808

).

A

F19136

Tire Pressure Monitor ECU:

T17

RF5V

GND2

RDA

F19137

Tire Pressure Monitor Receiver Assy:

T19

+5V

GND

RDA

F19138

Tire Pressure Monitor ECU:

T17

RF5V

GND2

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

DI–865

1059

9

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:

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

10

Inspect tire pressure monitor ECU.

PREPARATION:
Connect the tire pressure monitor ECU T17 connector.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Tester Connection

Condition

Specified Condition

T17–8 (RF5V) – 

T17–16 (GND2)

Ignition Switch ON

4.5 to 5.5 V

NG

Check power source circuit 
(See page 

DI–878

).

OK

DI–866

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

1060

11

Replace tire pressure monitor receiver assy (See page 

SA–13

).

NEXT

12

Check DTC (See page 

DI–820

).

PREPARATION:
Clear the DTCs.
CHECK:
Check for a DTC.
OK:

DTC is not output.

OK

End

NG

13

Replace tire pressure monitor ECU and check DTC.

PREPARATION:
(a)

Replace the tire pressure monitor ECU (see page 

SA–20

).

(b)

Clear the DTCs.

CHECK:
Check for a DTC.
OK:

DTC is not output.

NG

Replace tire pressure monitor valve sub–assy
(See page 

SA–16

).

OK

End