DTC 91

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 and receiver receives a speed signal from the combination meter assembly. 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. The 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 ECU using the Techstream and note 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 if the ECU and/or one of the valve and transmitters have been replaced.

PROCEDURE

1. CHECK DTC

(a) Check for DTCs of the multiplex communication and the speed sensor.

Result:





A -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
C -- Continue to next step.

2. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

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

(e) Check that the value indicated on the Techstream and on the combination meter assembly are the same.

Tire Pressure Monitor:





OK:

Vehicle speed indicated on the Techstream indicates the actual speed.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal

OK -- REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Removal