C2191

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

DESCRIPTION

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





INSPECTION PROCEDURE

NOTICE:
- When replacing the tire pressure warning ECU, 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 after the ECU and/or the tire pressure warning valve and transmitter has been replaced.

PROCEDURE

1. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

(a) Check if DTCs for the vehicle stability control system are output Reading and Clearing Diagnostic Trouble Codes.

OK:

No DTCs for vehicle stability control system are output.

NG -- GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Vehicle Stability Control System
OK -- Continue to next step.

2. CHECK DTC (METER/GAUGE SYSTEM)

(a) Check if DTCs for the meter/gauge system are output Reading and Clearing Diagnostic Trouble Codes.

OK:

No DTCs for meter/gauge system are output.

NG -- GO TO METER/GAUGE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Meter / Gauge System
OK -- Continue to next step.

3. CHECK VEHICLE SPEED SIGNAL (DATA LIST)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

(e) Check that the values by referring to the table below.

Tire Pressure Monitor





OK:

The vehicle speed displayed on the Techstream changes depending on the actual vehicle speed.

NG -- REPLACE TIRE PRESSURE WARNING ECU Removal

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