DTC 91

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

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

WIRING DIAGRAM:

INSPECTION PROCEDURE

NOTICE:
^ When replacing the tire pressure warning ECU, read the IDs stored in the ECU using the intelligent tester and write 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 has been replaced. Initialization

Step 1(Part 1):

Steps 1(Part 2)-2: