C2179

TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: C2179/79: Tire Pressure Monitor ECU Communication Stop
C2179/79 - Tire Pressure Monitor ECU Communication Stop

DESCRIPTION

The tire pressure warning ECU receives speed signals from the combination meter via CAN communication.





INSPECTION PROCEDURE

NOTICE:
- When replacing the tire pressure warning ECU, 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 after the ECU has been replaced.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG) and turn the Techstream on.

(d) Enter the following menus: "Bus Check" from the "System Select" / "Communication Malfunction DTC" from the "Bus Check" screen.

(e) Check the CAN communication system Diagnosis System.

OK:

The CAN communication system is normal.

NG -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK VEHICLE SPEED SIGNAL (DATA LIST)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG) and turn the Techstream on.

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

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

Tire Pressure





OK:

The vehicle speed displayed on the Techstream changes depending on the actual vehicle speed.

NG -- GO TO METER / GAUGE SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

3. PERFORM SIGNAL CHECK (VEHICLE SPEED SIGNAL)

(a) Enter the signal check mode in Test Mode (Signal Check 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 (sensor check mode) DTCs.

Result:





B -- REPLACE TIRE PRESSURE WARNING ECU Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting