2001 TOYOTA SEQUOIA Page 18

DIDJX±01
DI±802
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
996 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING
The hand±held tester can be used at steps 3, 7 and 9.
1 Vehicle Brought to Work Shop
NEXT
2 Customer Problem Analysis (See page DI±804)
NEXT
3 DTC Check and Clear (See page DI±820)
DTC is output: Go to step 4
DTC is not output: Go to step 5
4 DTC Chart (See page DI±825)
Go to step 7
5 Problem Symptom Confirmation
Symptom does not occur: Symptom simulation
(See page IN±24)
Symptom occurs: Go to step 6

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±803
997 Author: Date:
2005 SEQUOIA (RM1146U)
6 Problem Symptoms Table (See page DI±814)
Go to step 8
7 Circuit Inspection (See page DI±827 To DI±888)
NEXT
8 Repair
NEXT
9 Confirmation Test
NEXT
End

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±807
1001 Author: Date:
2005 SEQUOIA (RM1146U)
4. CONFIRMATION OF TRANSMITTER ID REGISTRATION
(a) Set the tire pressure of all wheels to the specified value.
Tire sizeFrontRearSpare
P245 / 70 R 16220 kPa (2.2 kgf/cm2, 32 psi)240 kPa (2.4 kgf/cm2, 35 psi)240 kPa (2.4 kgf/cm2, 35 psi)
P265 / 70 R 16220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)
P265 / 65 R 17220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)220 kPa (2.2 kgf/cm2, 32 psi)
(b) Connect the hand±held tester to DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select ºSIGNAL CHECKº mode on the hand±held tester (see page DI±810).
(e) Forcibly transmit the transmitter IDs for all wheels.
(1) When rapidly reducing the pressure, remove the valve core (above 20 kPa/15 sec.).
HINT:

The transmitter ID can be transmitted by rapidly reducing the tire air pressure.

When rapidly reducing the pressure, remove the valve core (above 20 kPa/15 secs.).
(2) Perform the steps mentioned above to all tires including the spare tire.
(f) Check that test mode DTCs C2181/81, C2182/82, C2183/83, C2184/84 and C2185/85 are all erased.
HINT:

The transmitter ID registration is complete when the test mode DTCs are erased.

If they haven't been erased, reset the tire pressure to the specified value and rotate the tire 90 to 270
degrees. Then forcibly transmit the transmitter IDs of all wheels. If they are still output, register the
transmitter IDs.
(g) Set the tire pressure of all wheels to the specified value.

± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±813
1007 Author: Date:
2005 SEQUOIA (RM1146U)
DTC of SIGNAL CHECK (TEST DIAGNOSIS) function:
If a malfunction code is displayed during the test mode DTC check, check the circuit listed for that code. For
details of each code, refer to the ºSee Pageº under respective ºDTC No.º in the chart.
DTC No.
(See Page)Detection ItemTrouble Area
C2181/81
(DI±834)Transmitter ID1 not received

Tire pressure monitor receiver assy

Each tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Wire harness
C2182/82
(DI±834)Transmitter ID2 not received

Tire pressure monitor receiver assy

Each tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Wire harness
C2183/83
(DI±834)Transmitter ID3 not received

Tire pressure monitor receiver assy

Each tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Wire harness
C2184/84
(DI±834)Transmitter ID4 not received

Tire pressure monitor receiver assy

Each tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Wire harness
C2185/85
(DI±834)Transmitter ID5 not received

Tire pressure monitor receiver assy

Each tire pressure monitor valve sub±assy

Tire pressure monitor ECU

Wire harness
C2191/91
(DI±870)Vehicle speed signal error

Vehicle speed sensor

Combination meter assy

Tire pressure monitor ECU

Wire harness

DIDK1±01
DI±814
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1008 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during DTC check but the problem still occurs, check the circuits for each prob-
lem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
SymptomSuspected AreaSee page
Tire pressure warning system does not operate.
1. Tire pressure monitor valve sub±assy
2. Tire pressure monitor receiver assy
3. Power source circuit
4. Tc terminal circuit
5. Combination meter assy
6. Tire pressure monitor ECU±
±
DI±878
DI±888
BE±55
±
DTC check cannot be done.
1. Power source circuit
2. Tc terminal circuit
3. Tire pressure monitor ECUDI±878
DI±888
±
Tire pressure warning lamp malfunctions (Does not light up).
1. Power source circuit
2. Tire pressure warning lamp circuit
3. Combination meter assy
4. Tire pressure monitor ECUDI±878
DI±873
BE±55
±
Tire pressure warning lamp malfunctions (Remains ON).
1. Tire pressure check
2. Tire pressure monitor ECU connector poorly connected
3. Tire pressure warning lamp circuit
4. Combination meter assy
5. Tire pressure monitor ECUSA±3
±
DI±873
BE±55
±
Tire pressure warning lamp malfunctions (Blinking).
1. Check DTC
2. Tc terminal circuit
3. Test mode (SIGNAL CHECK)
4. Tire pressure monitor ECUDI±820
DI±888
DI±810
±
Initialization cannot be done.
1. Test mode (SIGNAL CHECK)
2. Tire pressure warning reset switch
3. Tire pressure monitor ECUDI±810
DI±875
±

D13491
DLC3:
BAT
SIL CG
DIDK3±01
F19148
Combination Meter
Tire Pressure
Warning Lamp DI±816
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1010 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
1. CHECK BATTERY VOLTAGE
Battery voltage: 11 to 14 V
If the voltage is below 11 V, recharge the battery before pro-
ceeding.
2. CHECK DLC3
The vehicle's tire pressure monitor ECU uses ISO 9141±2 for
communication. The terminal arrangement of DLC3 complies
with SAE J1962 and matches the ISO 9141±2 format.
Verify the conditions listed in the table below:
Terminal No.Disc.Connection / Voltage or ResistanceCondition
7SILBus + Line / Pulse generationDuring transmission
4CGChassis Ground to Body Ground / 1 W or lessAlways
16BATBattery Positive to Body Ground / 10 to 14 VAlways
HINT:
If the hand±held tester display shows UNABLE TO CONNECT
TO VEHICLE when the cable of the hand±held tester is con-
nected to DLC3, the ignition switch is turned to the ON position
and the tester is operated, there is a problem on the vehicle side
or tester side.

If communication is normal when the tester is connected
to another vehicle, inspect DLC3 on the original vehicle.

If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tester itself, so consult the Service Department listed in
the tester's instruction manual.
3. DIAGNOSIS SYSTEM
(a) Warning lamp
(1) The tire pressure warning lamp blinks when there is
any malfunction in the tire pressure warning sys-
tem.
NOTICE:
When the malfunction has been corrected, the tire pres-
sure warning lamp does not come on.
(b) DTCs (Normal mode)
(1) DTCs are memorized in the tire pressure monitor
ECU and read by the blinks of the tire pressure
warning lamp or using the hand±held tester (see
page DI±820.
(c) Test mode
(1) By switching from normal mode into test mode (in-
put signal check), you can inspect the tire pressure
monitor receiver assy, each tire pressure monitor
valve sub±assy and vehicle speed sensor (see
page DI±810).

F19148
Combination Meter
Tire Pressure
Warning Lamp
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±817
1011 Author: Date:
2005 SEQUOIA (RM1146U)
4. CHECK WARNING LAMP
(a) Turn the ignition switch to the ON position.
(b) Check that the tire pressure warning lamp comes on for
3 seconds.
If the warning check result is not normal, proceed to the trouble-
shooting for the tire pressure warning lamp circuit.
Trouble AreaSee page
Tire pressure warning lamp circuitDI±873

DIDK4±01
D13491
DLC3:
CG TC
F19148
Combination Meter
Tire Pressure
Warning Lamp
F19128
ON0.25 sec.
OFF
0.25 sec.
0.5 sec.
1.5 sec.4.5 sec. 2.5 sec.
0.5 sec. ON
OFF Normal System Code:
Code 13 and 33:
1.5 sec.
Repeat
D05981DLC3
Hand±Held
Tester
DI±820
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1014 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
1. DTC CHECK (USING SST CHECK WIRE)
(a) Check DTCs.
(1) Using the SST, connect terminals TC and CG of
DLC3.
SST 09843±18040
(2) Turn the ignition switch to the ON position.
(3) Read and record any DTCs from the tire pressure
warning lamp on the combination meter. Refer to
the illustration on the left for examples of a normal
system code and codes 13 and 33.
HINT:

If the tire pressure warning lamp does not blink any DTCs
or the normal system code, inspect the tire pressure
warning lamp circuit or TC terminal circuit.
Trouble AreaSee page
Tire pressure warning lamp circuitDI±873
TC terminal circuitDI±888

If 2 or more malfunctions are indicated at the same time,
the lowest numbered DTC is displayed first.
(4) Refer to the Diagnostic Trouble Code Chart (see
page DI±825) for DTC information.
(5) After completing the check, turn the ignition switch
off and remove the SST from DLC3.
SST 09843±18040
2. DTC CHECK (USING HAND±HELD TESTER)
(a) Check DTCs.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Read the DTCs following the prompts on the tester
screen.
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.