C2173

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 C2124/24 (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 the Techstream and write them down before removal.
* It is necessary to perform initialization Initialization after registration 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 Test Mode Procedure.

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

(c) Start the engine and allow it to run at 1000 rpm for 3 seconds or more to DTC C2194/94.

(d) Check for 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 C2194

B -- GO TO DTC C2191/91 C2191

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