C2191

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 the intelligent tester 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. CHECK COMBINATION METER SYSTEM
(a) The circuits that send vehicle speed signals to this system are inspected in the meter system Speed Signal Circuit.
(b) During inspection for the meter section, if there is an instruction that indicates to go back to inspections for each system, proceed to the next step.
NEXT -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR





(a) Disconnect the F2 meter connector.
(b) Disconnect the E60 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - NO.3 JUNCTION BLOCK)
OK -- REPLACE TIRE PRESSURE WARNING ECU
3. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - NO.3 JUNCTION BLOCK)
(a) Disconnect the 3O connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (TIRE PRESSURE WARNING ECU - NO. 3 JUNCTION BLOCK)
OK -- REPAIR OR REPLACE HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK)