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 20 km/h (12 mph) 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 transmitter IDs stored in the old ECU using the intelligent tester or Techstream 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 and/or valve and transmitter has been replaced.

Step 1:

Step 1-2 (Part 1):

Step 2 (Part 2):