Toyota Avalon (XX50): Tire Pressure Monitor ECU Communication Stop Mode. Utility

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Power Source, Network / Networking / Can Communication System(for Hv Model) / Tire Pressure Monitor ECU Communication Stop Mode. Utility

Tire Pressure Monitor ECU Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Tire Pressure Monitor ECU Communication Stop Mode	Any of the following conditions are met: Communication stop for "Tire Pressure" is indicated on the "Communication Bus Check" screen of the Techstream. Click here Communication stop history for "Tire Pressure" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Tire Pressure" is 6 or more.) Click here Communication system DTCs (DTCs that start with U) that correspond to "Tire Pressure Monitor ECU Communication Stop Mode" in "DTC Combination Table" are output. Click here	Tire pressure warning ECU and receiver branch line or connector Power source circuit of tire pressure warning ECU and receiver Tire pressure warning ECU and receiver ground circuit Tire pressure warning ECU and receiver

Detection Item

Symptom

Trouble Area

Tire Pressure Monitor ECU Communication Stop Mode

Any of the following conditions are met:

Communication stop for "Tire Pressure" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communication stop history for "Tire Pressure" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Tire Pressure" is 6 or more.)
Click here
Communication system DTCs (DTCs that start with U) that correspond to "Tire Pressure Monitor ECU Communication Stop Mode" in "DTC Combination Table" are output.
Click here

Tire pressure warning ECU and receiver branch line or connector
Power source circuit of tire pressure warning ECU and receiver
Tire pressure warning ECU and receiver ground circuit
Tire pressure warning ECU and receiver

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Click here
Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the power switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Click here
Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.	CHECK FOR OPEN IN CAN BUS LINES (TIRE PRESSURE WARNING ECU AND RECEIVER BRANCH LINE)

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the K11 tire pressure warning ECU and receiver connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K11-9 (CANH) - K11-10 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

*a	Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER)

2.	CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K11-12 (GND) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

*a	Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver)

(b) Reconnect the cable to the negative (-) auxiliary battery terminal.

Standard Voltage:

Tester Connection	Condition	Specified Condition
K11-1 (IG) - Body ground	Power switch on (IG)	11 to 14 V
K11-7 (+B) - Body ground	Power switch off	11 to 14 V

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Utility

UTILITY

INITIALIZE THE CONNECTION INFORMATION OF A GATEWAY FUNCTION EQUIPPED ECU (BUS MONITOR ECU)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus:

for Body Electrical / Central Gateway / Utility / Initialization

Body Electrical > Central Gateway > Utility

Tester Display
Initialization

for Body Electrical / Main Body / Utility / Initialization

Body Electrical > Main Body > Utility

Tester Display
Initialization

(e) Initialize the ECU.

System Diagram. Terminals Of Ecu. Tilt and Telescopic ECU Communication Stop Mode

Lin Communication System(for Gasoline Model)

See More:

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