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 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 CAN COMMUNICATION SYSTEM

(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) Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen, to inspect the CAN Bus.

NG -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLE SHOOTING) How to Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Check for DTC Diagnosis System.

Result





NG -- GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) CAN Communication System
OK -- Continue to next step.

3. CHECK DTC (BRAKE CONTROL SYSTEM)

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

OK:

No DTCs for the brake control system are output.

NG -- GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Electronically Controlled Brake System
OK -- Continue to next step.

4. 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 the meter / gauge system are output.

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

5. 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 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 -- REPLACE TIRE PRESSURE WARNING ECU Removal

OK -- GO TO TEST MODE PROCEDURE Test Mode Procedure