DTC 91

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 receives a speed signal from the combination meter. This DTC is stored upon entering test mode, and cleared when a vehicle speed signal of 12 mph (20 km/h) 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, read the IDs stored in the ECU using 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 has been replaced.

PROCEDURE

1. READ VALUE ON TECHSTREAM
(a) Make sure that the ignition switch is off.
(b) Connect Techstream to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select the item below in the Data List, and read the value displayed on Techstream.
HINT: Enter the following menus: Body / Combination Meter / Data List.

METER:





(e) Check that the values indicated on the tester and on the combination meter are the same.
OK:
The vehicle speed displayed on the tester changes depending in the actual vehicle speed.
NG -- GO TO METER / GAUGE SYSTEM
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (ECU - COMBINATION METER)




(a) Disconnect the T11 ECU connector.
(b) Disconnect the C6 meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE TIRE PRESSURE WARNING ECU