DESCRIPTION
The tire pressure warning ECU receives a vehicle speed signal from the combination meter. This DTC is stored upon entering test mode and cleared when a vehicle speed signal of 20 km/h (12 mph) is detected for 3 seconds or more. This DTC is stored only in test mode.
DTC Code |
Detection Condition |
Trouble Area |
---|---|---|
C2191/91 |
The test mode procedure is performed. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (VEHICLE SPEED) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(f) Check that the values indicated on the Techstream and on the combination meter are the same.
Tire Pressure Monitor
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Vehicle Speed |
Vehicle speed/ min.: 0 km/h (0 mph) max.: 255 km/h (158 mph) |
Almost same as actual vehicle speed |
The speed indicated on the combination meter. |
OK:
Vehicle speed indicated on the Techstream and on the combination meter are the same.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
2. |
INSPECT TIRE PRESSURE WARNING ECU (SPD SIGNAL) |
(a) Disconnect the F7 ECU connector.
(b) Jack up the vehicle.
(c) Move the shift the lever to N.
(d) Turn the ignition switch to ON.
(e) Check the waveform of the ECU connector using an oscilloscope while turning any of the wheels slowly. OK:
HINT: The wavelength becomes shorter as the wheels are rotated faster. Text in Illustration
|
|
OK | ![]() |
REPLACE TIRE PRESSURE WARNING ECU |
|
3. |
CHECK HARNESS AND CONNECTOR (ECU - COMBINATION METER) |
(a) Disconnect the F7 ECU connector.
(b) Disconnect the F14 meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F7-2 (SPD) - F14-28 (+S) |
Always |
Below 1 Ω |
F7-2 (SPD) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
GO TO METER/GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Toyota dealer as soon as possible.
Visible symptoms
• Fluid leaks under the vehicle (Water dripping from the air
conditioning after use is norm ...
Scanning radio stations (excluding XM® Satellite Radio)
Scanning the preset radio stations
Press and hold
until you hear a beep.
Preset stations will be played for 5 seconds each.
When the desired station is
reached, press again.
Scanning all radio stations within range
Press
.
All the stations wit ...