DTC 91

DTC C2191/91 Vehicle Speed Signal Error (Test Mode DTC)

DESCRIPTION
The tire pressure monitor ECU receives a speed signal from the combination meter. This DTC is stored upon entering the test mode, and cleared when a vehicle speed signal of 20 km/h (12 mph) is detected for 3 seconds or more. The DTC is output only in the test mode.

C2191/91:

WIRING DIAGRAM:

INSPECTION PROCEDURE

NOTICE:
^ When replacing the tire pressure warning ECU, read the IDs stored in the ECU using the intelligent tester and note them down before removal.
^ It is necessary to perform initialization after registration of the transmitter IDs into the tire pressure warning ECU after the ECU and/or valve and transmitter has been replaced.

Steps 1-2: