DESCRIPTION The main body ECU (multiplex network body ECU) sends signals to the tire pressure warning ECU and receiver via a direct line. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Note | | C2179/79 |
Tire Pressure Monitor ECU Communication Stop |
Communication
between the main body ECU (multiplex network body ECU) and tire
pressure warning ECU and receiver is interrupted for 10 seconds or more. |
- Main body ECU (Multiplex network body ECU)
- Wire harness or connector
- Tire pressure warning ECU and receiver
| - | WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- When replacing the tire pressure warning ECU and receiver, read the
transmitter IDs stored in the old ECU using the Techstream and write
them down before removal.
- It is necessary to perform initialization
 after registration
of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.
PROCEDURE |
1. | CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the P21 tire pressure warning ECU and receiver connector.
(b) Disconnect the J165 main body ECU (multiplex network body ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
P21-5 (PRG) - J165-5 (PRG) |
Always | Below 1 Ω | |
P21-5 (PRG) or J165-5 (PRG) - Body ground |
Always | 10 kΩ or higher |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK |
 | |
| 2. |
REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER |
(a) Replace the tire pressure warning ECU and receiver. Click here
|
NEXT | |
| |
(a) Clear the DTCs.
Click here (b) Turn the ignition switch off.
(c) Turn the ignition switch to ON. (d) Check for DTCs. Click here
OK: DTC C2179/79 is not output.
| OK |
| END |
| NG |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) | | 
