Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 20v15 preche40
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05-347
DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
05BW8-04
PRE-CHECK
1. TIRE PRESSURE WARNING SYSTEM DESCRIPTION
(a) The tire pressure warning system warns decline of the tire air pressure to the driver. When the tire pres-
sure warning system detects the low air pressure which disturbs safe driving from any of 4 wheels, the
tire pressure warning lamp comes on.
HINT:
When the ignition switch is OFF, the tire pressure warning lamp goes off. However, when the ignition switch
is turned ON again, and the vehicle is driven at more than 30 km/h (19 mph), the tire pressure warning lamp
comes on again.
2. TIRE PRESSURE WARNING SYSTEM PRECAUTION
(a) When the tire pressure warning lamp comes on, immediately check the air pressure of the tire and ad-
just it to the specified pressure (See page 28-1 ). When the ignition switch is turned OFF, the tire pres-
sure warning lamp goes off.
(b) This system needs initializing after changing tires or wheels and rotating the tires.
(c) In the following cases, the system does not operate normally.
S When vehicle speed is 30 km/h (19 mph) or less.
S When tires size is different from that which is specified.
S When tires of different sizes or types are used simultaneously.
S When the spare tire or snow tires are used, or when chains are used.
S When the vehicle is driven on unpaved, extremely rough or slippery roads.
S When one of the tires on the vehicle is extremely worn or new.
(d) When the run-flat tires are used, replace the tire if the pressure is 100 kPa (1 kgf/cm, 14 psi) or less.
(if the tire is reused, it could damaged.)
3. FAIL-SAFE FUNCTION
(a) When a system malfunction occurs in the tire pressure warning system, the tire pressure warning lamp
blinks.
NOTICE:
If the malfunction returns to normal, the tire pressure warning lamp does not blink.
(b) The result of this diagnosis is stored in the skid control ECU.
4. TIRE PRESSURE WARNING DISPLAY FUNCTION
(a) Based on the tire pressure warning system condition, turn
the tire pressure warning lamp on as shown in the table.
Tire Pressure
Warning Lamp
F44418
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
TIRE PRESSURE WARNING LAMP CHART:
Priority Condition Tire Pressure Warning Lamp Output Pattern
1 While detecting the system abnormal 1 Tire pressure warning lamp comes on
Tire pressure warning lamp signal is opened.
HINT: ON
When the tire pressure warning lamp drive OFF
signal circuit opens due to the skid control
ECU malfunction, communication error, Signal Open
open circuit in the wire harness, etc. the
tire pressure warning lamp comes on as
system malfunction 1.
2 When the ignition switch is ON. Tire pressure warning lamp comes on for 3
seconds once the ignition switch is turned
ON. (However, during initialization, the lamp
comes on for 4 seconds.)
3 to 4 Sec.
ON
OFF
Ignition Switch ON
3 While detecting the system abnormal 2 Tire pressure warning lamp blinks
(ABS system malfunction) (Turning on and off repeatedly at 0.5 second
(Speed sensor malfunction) intervals.)
(Stop lamp switch assy malfunction) 0.5 Sec.
HINT:
ON
When the skid control ECU monitors the
speed sensor signal and the stop lamp OFF
switch signal and judges that the tire pres- Malfunction 0.5 Sec.
sure warning lamp is not functioning prop- Occurs
erly, the tire pressure warning lamp blink HINT:
as system malfunction 2. (When the skid control ECU detects the system
malfunction 2, check the DTCs and proceed to
the pages which the DTCs are described.)
4 When the tire pressure warning Tire pressure warning lamp comes on when the
switch is ON during TEST mode. tire pressure warning switch operates.
(When TEST
mode) Switch Operating
ON
OFF
Switch ON
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
Priority Condition Tire Pressure Warning Lamp Output Pattern
5 When the initialization mode is received. Tire pressure warning lamp blinks 3 times
(Turning on and off repeatedly at 1 second in-
tervals.)
1 Sec.
ON
OFF
1 Sec.
Switch ON
6 When the initialize signal is sent. Tire pressure warning lamp blinks
(Turning on and off repeatedly at 0.25 second
intervals.)
0.25 Sec.
ON
OFF
0.25 Sec.
Vehicle
Running
7 Outputting the result. When tire air pressure is judged to be normal:
Not come on:
ON
OFF
When tire air pressure is judged to be low:
Come on:
ON
OFF
Determination of Decrease of the Tire Air Pressure
HINT:
When the skid control ECU does not operate properly, the ABS warning lamp comes on as ABS system mal-
function.
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
5. INITIAL SETTING OF TIRE PRESSURE WARNING
SYSTEM
(a) Check and adjust the tire air pressure to the specified val-
ue (See page 28-1 ).
(b) With the vehicle stopped, turn the ignition switch ON.
(c) Press the tire pressure warning switch until the tire pres-
sure warning lamp blinks 3 times at a 1 second interval.
(Continue pressing the tire pressure warning switch for
Tire Pressure Tire Pressure approximately 3 to 4 seconds.) (Receipt of the initializa-
Warning Lamp Warning Switch tion signal.)
HINT:
Lamp Output Pattern:
When the tire pressure warning lamp does not blink, perform ini-
F Receipt of the Initialization Signal
tialization again. (with the ignition switch off, perform the proce-
Switch ON
1 Sec. dure above starting at step 5-(b).)
ON
(d) Drive the vehicle and speed it up at 30 km/h (19 mph) or
OFF more, and then initialize when the skid control ECU to its
1 Sec. initial condition. (It takes about 0.5 to 1.0 hour to complete
the initialization depends on.)
F Failure of Initialization HINT:
Vehicle Running If the tire pressure warning lamp blinks at 0.25 second intervals
0.25 Sec.
ON while the vehicle is being driven, the initialization may be failed,
so perform the initialization again. (Turn the ignition switch OFF
OFF
0.25 Sec. and retry from step 5-(b).)
F44422 (e) After initialization, the skid control ECU monitors the de-
crease of the tire air pressure.
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
6. DIAGNOSIS SYSTEM
(a) Inspect the battery voltage.
Battery voltage: 11 to 14 V
If voltage is below 11 V, recharge the battery before proceeding.
(b) Check DLC3.
The vehicle's skid control ECU uses ISO 9141-2 for com-
munication. The terminal arrangement of DLC3 complies
with SAE J1962 and matches with the ISO 9141-2 for-
DLC3
C52361 mat.
Verify conditions listed in table below:
Terminal No. Connection / Voltage or Resistance Condition
7 Bus + Line / Pulse generation During transmission
4 Chassis Ground to Body Ground / 1 or less Always
16 Battery Positive to Body Ground / 9 to 14 V Always
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 ON and the tester
is operated, there is a problem on the vehicle side or tester side.
S If communication is normal when the tester is connected
to another vehicle, inspect DLC3 on the original vehicle.
S 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.
7. CHECK WARNING LAMP
(a) Turn the ignition switch OFF.
(b) With the ignition switch ON, the lamp should illuminate for
3 seconds and then go out.
HINT:
S However, during initialization, the tire pressure warning
Tire Pressure lamp comes on for 4 seconds.
Warning Lamp S If the tire pressure warning lamp has a defect, check the
tire pressure warning lamp output patterns (See the tire
Lamp Output Pattern: pressure warning lamp display function, step 4) and the
Ignition Switch ON
problem symptoms table (See page 05-364 ).
ON
OFF 3 to 4 Sec.
F44420
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
8. CHECK TIRE PRESSURE WARNING SWITCH FUNC-
TS
TION (USING SST CHECK WIRE)
(a) Make sure the ignition switch is OFF.
(b) Using the SST, connect the terminals TS and CG of
DLC3.
SST 09843-18040
(c) Turn the ignition switch ON (The mode switches to TEST
DLC3 mode).
CG
C52361
(d) Press the tire pressure warning switch is ON.
(e) Check that the tire pressure warning lamp comes on.
HINT:
S Unless the above operation including (d) is performed,
the tire pressure warning lamp remains off while TEST
mode.
S When the tire pressure warning system has any problem,
the tire pressure warning lamp blinks at 0.5 second inter-
Tire Pressure Tire Pressure val.
Warning Lamp Warning Switch If the indicator check result is not normal, proceed to the prob-
Lamp Output Pattern: lem symptoms table or TS terminal circuit.
F Normal Condition
Item See page
Switch ON
Problem symptoms table 05-364
ON TS terminal circuit (w/o VSC) 05-429
Switch
TS terminal circuit (w/ VSC) 05-526
OFF Operating
(f) Turn the ignition switch OFF.
(g) Remove the SST from the DLC3.
F System Malfunction SST 09843-18040
Switch ON 0.5 Sec.
ON
OFF
0.5 Sec.
F45199
(h) Turn the ignition switch ON.
(i) Check that the tire pressure warning lamp go off.
(j) Initial setting of the tire pressure warning system (See
step 5.).
Tire Pressure
Warning Lamp
Lamp Output Pattern:
ON
OFF
Ignition Switch ON
F45200
2005 SIENNA REPAIR MANUAL (RM1163U)
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
9. CHECK TIRE PRESSURE WARNING SWITCH FUNC-
TION (USING HAND-HELD TESTER)
(a) Connect the hand-held tester to DLC3.
(b) Turn the ignition switch ON.
(c) Select the "TEST MODE", and operate it the with hand-
held tester.
DLC3
Hand- held
Tester F44425
(d) Press the tire pressure warning switch is ON.
(e) Check that the tire pressure warning lamp comes on.
HINT:
S Unless the above operation including (d) is performed,
the tire pressure warning lamp remains off while TEST
mode.
S When the tire pressure warning system has any problem,
the tire pressure warning lamp blinks at 0.5 second inter-
Tire Pressure Tire Pressure val.
Warning Lamp Warning Switch If the indicator check result is not normal, proceed to the prob-
Lamp Output Pattern: lem symptoms table or TS terminal circuit.
F Normal Condition
Item See page
Switch ON
Problem symptoms table 05-364
ON TS terminal circuit (w/o VSC) 05-429
Switch
TS terminal circuit (w/ VSC) 05-526
OFF Operating
(f) Turn the ignition switch OFF.
F System Malfunction
Switch ON 0.5 Sec.
ON
OFF
0.5 Sec.
F45199
(g) Turn the ignition switch ON.
(h) Check that the tire pressure warning lamp goes off.
(i) Initial setting of the tire pressure warning system (See
step 5.).
Tire Pressure
Warning Lamp
Lamp Output Pattern:
ON
OFF
Ignition Switch ON
F45200
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
10. DTC CHECK (USING SST CHECK WIRE)
TC
HINT:
When the ABS warning lamp comes on while ignition switch is
ON, check the DTCs for the ABS system first.
(a) Checking DTCs.
(1) Using the SST, connect terminals TC and CG of
DLC3.
DLC3 SST 09843-18040
CG (2) Turn the ignition switch ON.
C52361
(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
code and codes 11 and 13.
HINT:
S If the tire pressure warning lamp does not blink any DTC
codes or the normal code, inspect the tire pressure warn-
Tire Pressure
ing lamp circuit or TC terminal circuit.
Warning Lamp
F44418 Trouble Area See page
Tire pressure warning lamp circuit 05-373
TC terminal circuit (w/o VSC) 05-427
Normal Code:
TC terminal circuit (w/ VSC) 05-524
0.25 Sec. S If 2 or more malfunctions are indicated at the same time,
ON the lowest numbered DTC is displayed first.
(4) Refer to the Diagnostic Trouble Code Chart (See
OFF page 05-358 ) for DTC information.
0.25 Sec. (5) After completing the check, remove SST from
DLC3.
Code 11 and 13: SST 09843-18040
1.5 Sec.
2.5 Sec. 4 Sec.
0.5 sec.
ON
OFF
1.5 Sec. 0.5 Sec. Repeat
F44432
(b) Clearing the DTCs.
TC
(1) Using the SST, connect terminals TC and CG of
DLC3.
SST 09843-18040
(2) Turn the ignition switch ON.
DLC3
CG
C52361
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
(3) Clear DTC stored in ECU by depressing the brake
pedal 8 times or more within 5 sec.
(4) Check that the tire pressure warning lamp shows
the normal code.
(5) Remove SST from DLC3.
SST 09843-18040
HINT:
Disconnect the battery cable during the operation will not erase
BR3890 DTC in ECU.
11. DTC CHECK (USING HAND-HELD TESTER)
HINT:
When the ABS warning lamp comes on while ignition switch is
ON, check the DTCs for the ABS system first.
(a) Checking DTCs using the Hand-held tester.
(1) Connect the hand-held tester to DLC3.
DLC3
(2) Turn the ignition switch ON.
Hand- held (3) Read DTCs by following the prompts on the tester
Tester F44425 screen.
HINT:
Refer to the hand-held tester operator's manual for further de-
tails.
(b) Clearing the DTCs using the Hand-held tester.
(1) Connect the hand-held tester to DLC3.
(2) Turn the ignition switch ON.
(3) Erase the DTCs following the prompts on the tester
screen.
HINT:
Refer to the hand-held tester operator's manual for further de-
tails.
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
12. DATA LIST
HINT:
By accessing the DATA LIST displayed by the hand-held tester, you can read the value of the switches and
sensors and so on without removing any parts. Reading the DATA LIST is the first step of troubleshooting
and is one method to shorten labor time.
(a) Connect the hand-held tester to DLC3.
(b) Turn the ignition switch ON.
(c) Following the display on the tester, read the "DATA LIST".
w/o VSC:
Measurement Item / Range (Dis-
Item Normal Condition Diagnostic Note
play)
ON: Brake pedal depressed
STOP LIGHT SW Stop light switch / ON or OFF -
OFF: Brake pedal released
Front right wheel speed reading /
WHEEL SPD FR min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Front left wheel speed reading /
WHEEL SPD FL min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Rear right wheel speed reading /
WHEEL SPD RR min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Rear left wheel speed reading /
WHEEL SPD RR min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Vehicle speed reading /
VEHICLE SPD min.: 0 km/h (0 mph) Actual vehicle speed Speed indicated on speedometer
max.: 255 km/h (158 mph)
NORMAL: Normal mode
TEST MODE Test mode / NORMAL or TEST -
TEST: During test mode
Number of DTC recorded / min.: 0,
#CODES Min.: 0, Max.: - -
max.: 255
w/ VSC:
Measurement Item / Range (Dis-
Item Normal Condition Diagnostic Note
play)
ON: Brake pedal depressed
STOP LIGHT SW Stop light switch / ON or OFF -
OFF: Brake pedal released
Front right wheel speed reading /
WHEEL SPD FR min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Front left wheel speed reading /
WHEEL SPD FL min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Rear right wheel speed reading /
WHEEL SPD RR min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Rear left wheel speed reading /
WHEEL SPD RR min.: 0 km/h (0 mph) Actual wheel speed Speed indicated on speedometer
max.: 326 km/h (202 mph)
Vehicle speed reading /
VEHICLE SPD min.: 0 km/h (0 mph) Actual vehicle speed Speed indicated on speedometer
max.: 255 km/h (158 mph)
EFI communication open detection
EFI COM Normal -
/ Open detection, Normal
2005 SIENNA REPAIR MANUAL (RM1163U)
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DIAGNOSTICS - TIRE PRESSURE WARNING SYSTEM
Measurement Item / Range (Dis-
Item Normal Condition Diagnostic Note
play)
NORMAL: Normal mode
TEST MODE Test mode / NORMAL or TEST -
TEST: During test mode
Number of DTC recorded / min.: 0,
#CODES Min.: 0, Max.: - -
max.: 255
13. ACTIVE TEST LIST
HINT:
Perform the ACTIVE TEST using the hand-held tester to operate the ABS warning light without removing
any parts. Performing the ACTIVE TEST is the first step of troubleshooting is one of the methods to shorten
labor time. It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Connect the hand-held tester to DLC3.
(b) Turn the ignition switch ON.
(c) Following the display on tester, perform the "ACTIVE TEST".
w/o VSC:
Item Vehicle Condition / Test Details Diagnostic Note
ABS WARN LIGHT ABS warning light / ON or OFF -
w/ VSC:
Item Vehicle Condition / Test Details Diagnostic Note
ABS WARN LIGHT ABS warning light / ON or OFF -
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 540
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