Toyota Sequoia (2005). Manual - part 268

F19884

Tire Pressure Warning Reset Switch
(harness side connector)

Tire Pressure Monitor ECU:

T18

CALSW

T17

F19144

Tire Pressure Warning Reset Switch

ON

OFF

2

1

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

DI–867

1061

14

Check harness and connector (Tire pressure warning reset switch – Tire pres-
sure monitor ECU).

PREPARATION:
Disconnect the tire pressure warning reset switch connector
T18 and tire pressure monitor ECU connector T17.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

T17–10 (CALSW) – T18–1

Below 1 

Ω

T17–10 (CALSW) – Body ground

10 k

Ω

 or higher

NG

Repair or replace harness or connector.

OK

15

Inspect tire pressure warning reset switch.

PREPARATION:
Disconnect the tire pressure warning reset switch connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the tire
pressure warning reset switch when the tire pressure warning
switch is ON and OFF.
OK:

Switch Condition

Specified Condition

ON

Below 1 

Ω

OFF

10 k

Ω

 or higher

NG

Replace tire pressure warning reset switch.

OK

F19138

Tire Pressure Monitor ECU:

T17

CALSW

GND2

DI–868

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

1062

16

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

T17–10 (CALSW) –

T17–16 (GND2)

IG Switch ON to OFF

8 to 16 V

NG

Repair or replace harness or connector.

OK

17

Check DTC (See page 

DI–820

).

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

DTC is not output.

OK

End

NG

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

DI–869

1063

18

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

F19792

Combination Meter

Tire Pressure Monitor ECU

To Battery

SPD

G–O

3

T17

C5

20

IE

Instrument Panel J/B

G–O

J8
J/C

A

IF

10

1

1H

11

T17 GND

IG

W–B

W–B

T17

J17
J/C

B

B

2

DI–870

–

DIAGNOSTICS

TIRE PRESSURE WARNING SYSTEM

1064

DTC

C2191/91 Vehicle Speed Signal Error

CIRCUIT DESCRIPTION

The tire pressure monitor ECU receives a speed signal from the combination meter. This DTC is stored upon
entering test mode but erased when a vehicle speed signal of 12 mph (20 km/h) is detected for 3 seconds
or more. The DTC is output only in test mode.

DTC No.

DTC Detecting Condition

Trouble Area

C2191/91

Speed sensor circuit malfunction.

Vehicle speed sensor

Combination meter assy

Tire pressure monitor ECU

Wire harness

WIRING DIAGRAM

DIDKE–01