TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: C2173/73: Vehicle Speed or Engine Speed Signal
Malfunction
C2173/73 - Vehicle Speed or Engine Speed Signal Malfunction
DESCRIPTION
The tire pressure warning ECU receives a vehicle speed signal from the combination meter and an engine speed signal from the ECM. The tire
pressure warning ECU uses these signals to detect DTCs C2121/21 to C2125/25 (No Signal from Transmitter) and DTC C2177/77 (Initialization not
Completed).
HINT
This DTC is set at the same time as DTCs C2121/21 to C2124/24 are being set.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using Techstream and write
them down before removal.
* It is necessary to perform initialization See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring
System/Testing and Inspection/Programming and Relearning/Initialization after registration See: Instrument Panel, Gauges
and Warning Indicators/Tire Monitoring System/Testing and Inspection/Programming and Relearning/Registration of the
transmitter IDs into the tire pressure warning ECU if the ECU has been replaced.
PROCEDURE
1. PERFORM SIGNAL CHECK (VEHICLE SPEED SIGNAL AND ENGINE SPEED SIGNAL)
(a) Enter the signal check mode in TEST MODE PROCEDURE See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring
System/Testing and Inspection/Initial Inspection and Diagnostic Overview/Test Mode Procedure.
(b) Drive the vehicle at 20 km/h (12 mph) or more for 3 seconds or more to erase DTC C2191/91.
(c) Start the engine and allow it to run at 1000 rpm for 3 seconds or more to erase DTC C2194/94.
(d) Check for test mode DTCs.
Result:
HINT
DTCs C2181/81 to C2185/85 (Transmitter ID not Received) are output at this time, but they are not related to this check.
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