C2191

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2191/91: Vehicle Speed Signal Error (Test Mode DTC)

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

DESCRIPTION

The tire pressure warning ECU and receiver receives a speed signal from the skid control ECU. 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 and receiver, read the 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 and receiver after the ECU and/or valve and transmitter has been replaced.

PROCEDURE

1. CHECK VEHICLE SPEED SIGNAL (DATA LIST)
(a) Turn the ignition switch OFF.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch ON and the Techstream on.
(d) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(e) Check that the values indicated on the Techstream and on the combination meter are the same.

Tire Pressure Monitor





OK:
Vehicle speed indicated on the Techstream indicates the actual speed.
NG -- CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)
OK -- USE SIMULATION METHOD TO CHECK
2. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)
(a) Check if speed sensor malfunction DTCs in the vehicle stability control system are output Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)
A -- REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER