DESCRIPTION The main body
ECU (multiplex network body ECU) and tire pressure warning ECU and
receiver are connected using 2 direct lines that they use to communicate
with each other. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Note | | B1247 |
Tire Pressure Monitor Receiver Communication Stop |
In
diagnostic mode, an applicable RDA signal cannot be received within 10
seconds after a PRG signal is sent from the main body ECU (multiplex
network body ECU). |
- Tire pressure warning ECU and receiver
- Wire harness or connector
- Main body ECU (multiplex network body ECU)
| This DTC is for main body ECU (multiplex network body ECU) | 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.
HINT: Inspect the fuses for circuits related to this system before performing the following inspection procedure. PROCEDURE
| 1. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - TIRE PRESSURE WARNING ECU AND RECEIVER) |
(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 | |
P21-4 (RDA) - J165-4 (RDA) |
Always | Below 1 Ω | |
P21-4 (RDA) or J165-4 (RDA) - Body ground |
Always | 10 kΩ or higher |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE OF TIRE PRESSURE WARNING ECU AND RECEIVER) |
| (a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
P21-12 (GND) - Body ground |
Always | Below 1 Ω | |
 |
|
*a | Front view of wire harness connector
(to Tire Pressure Warning ECU and Receiver) | | |
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
P21-1 (IG) - Body ground |
Ignition switch ON | 11 to 14 V |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 3. |
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 B1247 is not output.
| OK |
| END |
| NG |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) | | 
