C2191

TIRE AND WHEEL: 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 detected for 3 seconds or more. This DTC is output 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 registration Programming and Relearning of the transmitter IDs into the tire pressure warning ECU after the ECU has been replaced.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON and turn the Techstream on.

(d) Enter the following menus:

"Bus Check" from the "System Select" / "Communication Malfunction DTC" from the "Bus Check" screen

(e) Check the CAN communication system Diagnosis System.

NG -- CHECK AND REPLACE CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Turn the ignition switch off.

(b) Connect Techstream to the DLC3.

(c) Turn the ignition switch to ON and turn the Techstream on.

(d) Check for DTCs.

Result





C -- CHECK AND REPLACE CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting

B -- CHECK AND REPLACE CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

3. CHECK VEHICLE SPEED SIGNAL (DATA LIST)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON and turn 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:

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

NG -- GO TO METER / GAUGE SYSTEM How To Proceed With Troubleshooting

OK -- REPLACE TIRE PRESSURE WARNING ECU Removal