Lexus ES: Vehicle Speed Information Communication Lost (C2178)
DESCRIPTION
The tire pressure warning ECU and receiver receives signals from the combination meter assembly via CAN communication. If a malfunction occurs in this communication line, DTC C2178 is output.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C2178 | Vehicle Speed Information Communication Lost | Communication between the combination meter assembly and tire pressure warning ECU and receiver is interrupted for 10 seconds or more. |
| - |
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the tire pressure warning ECU and receiver, read the transmitter IDs and number of the transmitters (4 or 5) stored in the old ECU using the Techstream and write them down before removal.
-
It is necessary to perform initialization
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after registration of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.
PROCEDURE
| 1. | INSPECT COMBINATION METER ASSEMBLY (ON-VEHICLE INSPECTION) |
(a) Perform On-vehicle Inspection of the meter/gauge system.
Click here
HINT:
Check the meter function by referring to On-vehicle Inspection for the combination meter assembly.
| Result | Proceed to |
|---|---|
| Combination meter assembly is normal | A |
| Combination meter assembly is malfunctioning | B |
| A | .gif) | REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER |
| B | | GO TO METER / GAUGE SYSTEM |
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Components
COMPONENTS ILLUSTRATION *1 AIR CLEANER ASSEMBLY WITH AIR CLEANER HOSE *2 INLET AIR CLEANER ASSEMBLY *3 BATTERY CLAMP SUB-ASSEMBLY *4 COOL AIR INTAKE DUCT SEAL *5 ECM *6 STARTER ASSEMBLY *7 V-BANK COVER SUB-ASSEMBLY *8 VACUUM HOSE *9 NO. 1 FUEL VAPOR FEED
