C2179

TIRE AND WHEEL: 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 and receiver receives speed signals from the combination meter via multiplex communication.





WIRING DIAGRAM





INSEPCTION 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 Programming and Relearning after registration Programming and Relearning of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU and/or valve and transmitter has been replaced.
PROCEDURE

1. CHECK DTC (MULTIPLEX COMMUNICATION SYSTEM)

(a) Turn the ignition switch OFF.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch ON and the Techstream on.

(d) Check if multiplex communication system DTC B1271 (Combination Meter ECU Communication Stop) is output Reading and Clearing Diagnostic Trouble Codes.

Result





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

2. CLEAR DTC (TIRE PRESSURE WARNING SYSTEM)

(a) Turn the ignition switch OFF.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch ON and the Techstream on.

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

NEXT -- Continue to next step.

3. CHECK DTC (TIRE PRESSURE WARNING SYSTEM)

(a) Turn the ignition switch OFF.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch ON and the Techstream on.

(d) After turning the ignition switch ON, wait for 10 seconds or more and then check if DTC C2179/79 is output.

Result





B -- USE SIMULATION METHOD TO CHECK How to Proceed with Troubleshooting

A -- REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Service and Repair