Tire Pressure Warning System (For Sedan) Ecu Power Source Circuit

Suspension. Yaris. Ncp93, 131
Tire Pressure Monitoring. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (ECU-IG)

CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - BATTERY)

CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - BODY GROUND)

CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - FUSE)

TIRE PRESSURE WARNING SYSTEM (for Sedan) - ECU Power Source Circuit


DESCRIPTION

This is the power source for the tire pressure warning ECU.

WIRING DIAGRAM


Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Sedan) Ecu Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
  1. When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using a Techstream and write them down before removal.
  2. It is necessary to perform registration (YARIS_NCP93 RM000000XN107JX.html) of the transmitter IDs into the tire pressure warning ECU after the ECU has been replaced.
1.INSPECT FUSE (ECU-IG)
Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Sedan) Ecu Power Source Circuit

  1. Remove the ECU-IG fuse from the main body ECU.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ECU-IG
    		Always
    		Below 1 Ω


NG
Go to step 4
OK


2.CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - BATTERY)


    Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Sedan) Ecu Power Source Circuit

  1. Disconnect the D78 ECU connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D78-7 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Ignition switch OFF
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - BODY GROUND)


    Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Sedan) Ecu Power Source Circuit

  1. Disconnect the D78 ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D78-9 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TIRE PRESSURE WARNING ECU (YARIS_NCP93 RM0000024T801VX.html)

4.CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - FUSE)


    Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Sedan) Ecu Power Source Circuit

  1. Disconnect the D78 ECU connector.

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

    Standard resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D78-7 (IG) - Body ground
    		Ignition switch OFF
    		10 kΩ or higher


NG
REPLACE FUSE AND REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE FUSE