C2179

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2179/79: Tire Pressure Monitor ECU Communication Stop

DTC C2179/79 - Tire Pressure Monitor ECU Communication Stop

DESCRIPTION

The tire pressure warning ECU and receiver receives speed signals from the combination meter via multiplex communication.






INSPECTION PROCEDURE
NOTICE:
- When replacing the tire pressure warning ECU and receiver, 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 and receiver if the ECU has been replaced.

PROCEDURE

1. CHECK MULTIPLEX COMMUNICATION SYSTEM
(a) Check if DTC B1247 is output in the multiplex communication system Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1247 is not output.
NG -- GO TO MULTIPLEX COMMUNICATION SYSTEM
OK -- Continue to next step.
2. 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).
(d) Turn the Techstream on.
(e) Check that the values indicated on the Techstream and on the combination meter are the same. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

Tire Pressure Monitor:





OK:
The vehicle speed displayed on the Techstream changes depending on the actual vehicle speed.
NG -- GO TO METER / GAUGE SYSTEM
OK -- Continue to next step.
3. PERFORM SIGNAL CHECK (VEHICLE SPEED SIGNAL)
(a) Enter the signal check mode in TEST MODE PROCEDURE Test Mode Procedure.
(b) Drive the vehicle at 20 km/h (12 mph) or more for 3 seconds to erase DTC C2191/91.
(c) Check the test mode DTCs.
Result:






B -- REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER
A -- USE SIMULATION METHOD TO CHECK