DESCRIPTION
The tire pressure warning ECU receives an engine speed signal from the ECM. This DTC is stored upon entering test mode and cleared when an engine speed signal of 1000 rpm is detected for 3 seconds or more. This DTC is stored only in test mode.
DTC Code |
Detection Condition |
Trouble Area |
---|---|---|
C2194/94 |
The test mode procedure is performed. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (ENGINE 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 |
---|---|---|---|
Engine Speed |
Engine speed/ min.: 0 rpm max.: 65535 rpm |
Almost same as actual engine speed |
The speed indicated on the combination meter. |
OK:
Engine 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 (TACH SIGNAL) |
(a) Disconnect the F7 ECU connector.
(b) Start the engine.
(c) Check the waveform of the ECU connector using an oscilloscope while idling the engine. OK:
HINT: The wavelength becomes shorter as the engine speed increases. Text in Illustration
|
|
OK | ![]() |
REPLACE TIRE PRESSURE WARNING ECU |
|
3. |
CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - ECM) |
(a) Disconnect the F7 ECU connector.
(b) Disconnect the F50 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F7-4 (TACH) - F50-29 (TACH) |
Always |
Below 1 Ω |
F7-4 (TACH) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE ECM |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Disposal
DISPOSAL
PROCEDURE
1. DISPOSE OF STABILIZER CONTROL WITH ACCUMULATOR HOUSING ASSEMBLY
(a) Using a drill, make a hole in the areas of the accumulator housing
indicated in the illustration to discharge the gas inside.
CAUTION:
...
Data Signal Circuit between Navigation Receiver Assembly and Extension Module
DESCRIPTION
The stereo component tuner assembly sends the sound data signal or image data
signal from a device to the navigation receiver assembly via this circuit.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After replacing the navigation receiver ...