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 exchanges speed signals and warning light signals with 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 and/or the tire pressure warning valve and transmitter has been replaced.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.

NG -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Check for DTC Diagnosis System.

Result





B -- GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) CAN Communication System
A -- Continue to next step.

3. CHECK VEHICLE SPEED SIGNAL (DATA LIST)

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

Tire Pressure Monitor





OK:

Vehicle speed indicated on the Techstream and on the combination meter are the same.

NG -- GO TO METER/GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How To Proceed With Troubleshooting
OK -- Continue to next step.

4. CLEAR DTC

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

5. CHECK DTC

(a) Check for DTC Reading and Clearing Diagnostic Trouble Codes.

NOTICE:
After turning the engine switch on (IG), wait for 10 seconds or more and then check if DTC C2179/79 is output.

Result





B -- REPLACE TIRE PRESSURE WARNING ECU Removal

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