Vehicle Speed or Engine Speed Signal Malfunction - Tire Pressure Monitoring (from 12/2010)

TIRE AND WHEEL: 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 in Main Mode) and DTC C2177/77 (Initialization not Completed).





NOTICE:
When DTCs C2121/21 to C2125/25 are stored in the tire pressure warning ECU, DTC C2173/73 may be stored simultaneously. In such cases, troubleshoot C2173/73 first, then troubleshoot DTCs C2121/21 to C2125/25 Tire Pressure Monitoring (from 12/2010).

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using the Techstream and note them down before removal.
* It is necessary to perform the initialization Initialization (from 12/2010) after the registration Registration (from 12/2010) 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 Test Mode Procedure (from 12/2010).

(b) Drive the vehicle at 20 km/h (12 mph) or more for 10 seconds to erase DTC C2191/91 and C2194/94.

(c) Check the test mode DTCs.

Result





HINT
DTCs C2181/81 to C2184/84 (Transmitter ID not Received) are output at this time, but they are not related to this check.

C -- GO TO DTC C2194/94 Tire Pressure Monitoring (from 12/2010)

B -- GO TO DTC C2191/91 Tire Pressure Monitoring (from 12/2010)

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting