Page 1027 of 4323
DIDK6±01
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±825
1019 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If no abnormality is found when the parts are inspected, inspect the tire pressure monitor ECU.
If a malfunction code is displayed during the DTC check, inspect the circuit listed for that code. For
details of each code, refer to the ºSee pageº under respective ºDTC No.º in the DTC chart.
DTC chart of Tire Pressure Warning:
DTC No.
(See Page)Detection ItemTrouble Area
C2111/11
(DI±827)Transmitter ID1 operation stop
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
C2112/12
(DI±827)Transmitter ID2 operation stop
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
C2113/13
(DI±827)Transmitter ID3 operation stop
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
C2114/14
(DI±827)Transmitter ID4 operation stop
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
C2115/15
(DI±827)Transmitter ID5 operation stop
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
C2121/21
(DI±834)Transmitter ID1 not received
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
Wire harness
C2122/22
(DI±834)Transmitter ID2 not received
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
Wire harness
C2123/23
(DI±834)Transmitter ID3 not received
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
Wire harness
C2124/24
(DI±834)Transmitter ID4 not received
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
Wire harness
C2125/25
(DI±834)Transmitter ID5 not received
Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
Wire harness
C2141/41
(DI±842)Transmitter ID1 error
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2142/42
(DI±842)Transmitter ID2 error
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2143/43
(DI±842)Transmitter ID3 error
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2144/44
(DI±842)Transmitter ID4 error
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2145/45
(DI±842)Transmitter ID5 error
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
Page 1028 of 4323
DI±826
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1020 Author: Date:
2005 SEQUOIA (RM1146U)C2165/65
(DI±847)
Abnormal temperature inside ID1 tire
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2166/66
(DI±847)Abnormal temperature inside ID2 tire
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2167/67
(DI±847)Abnormal temperature inside ID3 tire
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2168/68
(DI±847)Abnormal temperature inside ID4 tire
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2169/69
(DI±847)Abnormal temperature inside ID5 tire
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
C2171/71
(DI±852)Transmitter ID not registeredTire pressure monitor ECU
C2176/76
(DI±854)Receiver error
Tire pressure monitor receiver assy
Tire pressure monitor ECU
Wire harness
C2177/77
(DI±860)Initialization incomplete
Tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Tire pressure monitor receiver assy
Wire harness
C2191/91
(DI±870)Vehicle speed signal error
Vehicle speed sensor
Tire pressure monitor ECU
Combination meter
Wire harness
Page 1029 of 4323
DIDK7±01
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±827
1021 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC C2111/11 Transmitter ID1 Operation Stop
DTC C2112/12 Transmitter ID2 Operation Stop
DTC C2113/13 Transmitter ID3 Operation Stop
DTC C2114/14 Transmitter ID4 Operation Stop
DTC C2115/15 Transmitter ID5 Operation Stop
CIRCUIT DESCRIPTION
The tire pressure monitor valve sub±assy stops transmitting signals when receiving specific signals. The
ECU stores the DTCs when the tire pressure monitor valve sub±assy receives the signals, for some reason,
and stops transmitting signals. As this is not a system malfunction, the DTCs are erased when signal trans-
mission is resumed.
HINT:
The electric wave is stopped at assembly plant, because the strength of the electric wave emitting from the
tire pressure sensing transmitter does not comply with the Japan Wireless Telegraphy Act.
DTC No.DTC Detecting ConditionTrouble Area
C2111/11
C2112/12
C2113/13
C2114/14
C2115/15
When any signal similar to the stop signal is received for
some reason, these DTCs will be output.Tire pressure monitor valve sub±assy
Tire pressure monitor receiver assy
Tire pressure monitor ECU
HINT:
It is necessary to perform the procedure to identify the tire pressure monitor valve sub±assy that is malfunc-
tioning because it cannot be identified by the output DTC.
Page 1030 of 4323
DI±828
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1022 Author: Date:
2005 SEQUOIA (RM1146U)
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 Forcibly transmit transmitter ID of all wheels.
PREPARATION:
Remove the valve cores of the all wheels to rapidly reduce the pressure of all tires to 120 kPa (1.2 kgf/cm2,
17 psi respectively).
HINT:
The transmitter ID can be transmitted forcibly by rapidly reducing tire air pressure.
NEXT
2 Check DTC (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
OK Set tire pressure to normal value (Transmitter
stop condition is completely reset).
NG
3 Set tire pressure to normal value.
PREPARATION:
Set the tire pressure back to the specified normal 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)
NEXT
Page 1032 of 4323
F19136
Tire Pressure Monitor ECU:
T17
RF5V
GND2RDA
F19137
Tire Pressure Monitor Receiver Assy:
T19
+5V
GNDRDA
F19138
Tire Pressure Monitor ECU:
T17
RF5V
GND2
DI±830
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1024 Author: Date:
2005 SEQUOIA (RM1146U)
7 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 W
T17±8 (RF5V) ± T19±5 (+5V)Below 1 W
T17±16 (GND2) ± T19±4 (GND)Below 1 W
T17±7 (RDA) ± Body ground10 kW or higher
T17±8 (RF5V) ± Body ground10 kW or higher
T17±16 (GND2) ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
8 Inspect tire pressure monitor ECU.
PREPARATION:
(a) Connect the tire pressure monitor ECU T17 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 ConnectionConditionSpecified Condition
T17±8 (RF5V) ±
T17±16 (GND2)Ignition Switch ON4.5 to 5.5 V
NG Check power source circuit
(See page DI±878).
OK
Page 1033 of 4323
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±831
1025 Author: Date:
2005 SEQUOIA (RM1146U)
9 Replace tire pressure monitor receiver assy (See page SA±13).
NEXT
10 Check DTC (See page DI±820).
PREPARATION:
Clear the DTCs.
CHECK:
Check for a DTC.
OK:
DTC is not output.
OK End
NG
11 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
Page 1037 of 4323
F19171
Tire Pressure
Monitor ECU Tire Pressure Monitor
Valve Sub±assy Front LH
Tire Pressure Monitor
Valve Sub±assy Rear LH Tire Pressure Monitor
Valve Sub±assy Front RH
Tire Pressure Monitor
Valve Sub±assy Rear RHJ29A
H
J30 3
4
5 BD2
5
1
4 +5V
RDA
GNDL
V
BR±R T19
Tire Pressure
Monitor Receiver
BD2
BD2L
VL
RF5V
RDA
GND2
Tire Pressure Monitor
Valve Sub±assy SpareJ29C J29B
I
J30
J
J30 BR±RBR±R J/C
T178
T177
T1716 V
: Radio Signal
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±835
1029 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT DESCRIPTION
The tire pressure monitor valve sub±assy constantly sends radio waves to the tire pressure monitor receiver
assy. If the battery for the tire pressure monitor valve sub±assy is depleted, or if the tire pressure monitor
receiver assy is defective or comes off, the DTC will be output. DTCs C2121/21 to C2125/25 can only be
deleted by the tester. DTCs C2181/81 to C2185/85 can be deleted when the transmitter sends a force trans-
mission signal or the test mode ends. DTCs C2181/81 to C2185/85 are output only in the test mode.
DTC No.DTC Detecting ConditionTrouble Area
C2121/21
C2122/22
C2123/23
C2124/24
C2125/25A DTC is detected when the ECU receives no signals for
51 minutes or more, the vehicle speed is 5 mph (8 km/h) or
higher, and the ECU receives no signals for 12 minutes or
more.Tire pressure monitor receiver assy
Each tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Wire harness
C2181/81
C2182/82
C2183/83
C2184/84
C2185/85
Malfunction in the transmitting/receiving circuit
Tire pressure monitor receiver assy
Each tire pressure monitor valve sub±assy
Tire pressure monitor ECU
Wire harness
HINT:
It is necessary to perform the procedure to identify the tire pressure monitor valve sub±assy that is malfunc-
tioning because it cannot be identified by the output DTC.
WIRING DIAGRAM
Page 1038 of 4323
DI±836
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1030 Author: Date:
2005 SEQUOIA (RM1146U)
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 Check tire pressure warning lamp.
PREPARATION:
Turn the ignition switch to the ON position.
CHECK:
Check the tire pressure warning lamp.
RESULT:
Does not blinkA
Comes on and goes off repeatedly at 0.5 second intervalsB
B Go to step 4.
A
2 Clear DTC (See page DI±820).
NEXT
3 Check DTC (See page DI±820).
CHECK:
Check for a DTC.
OK:
DTC is not output.
NG Go to step 4.
OK
Check problem symptoms table
(See page DI±814).
