Engine Immobiliser System (For Sedan) Ecu Power Source Circuit

Vehicle Interior. Yaris. Ncp93, 131
Theft Deterrent Keyless Entry. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (ECU-B)

INSPECT FUSE (IGN)

INSPECT INTEGRATION NO.1 RELAY (IG2 RELAY AND AM2 FUSE)

INSPECT IGNITION SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY AND BODY GROUND)

ENGINE IMMOBILISER SYSTEM (for Sedan) - ECU Power Source Circuit


DESCRIPTION

This circuit provides power to operate the transponder key ECU assembly.

WIRING DIAGRAM


Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Ecu Power Source Circuit


INSPECTION PROCEDURE

1.INSPECT FUSE (ECU-B)


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Ecu Power Source Circuit

  1. Remove the ECU-B fuse from the engine room R/B and J/B.

  1. Measure the ECU-B fuse resistance.

    Standard resistance:
    Below 1 Ω

  1. Reinstall the ECU-B fuse.



NG
REPLACE FUSE
OK


2.INSPECT FUSE (IGN)


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Ecu Power Source Circuit

  1. Remove the IGN fuse from the main body ECU.

  1. Measure the IGN fuse resistance.

    Standard resistance:
    Below 1 Ω

  1. Reinstall the IGN fuse.



NG
REPLACE FUSE
OK


3.INSPECT INTEGRATION NO.1 RELAY (IG2 RELAY AND AM2 FUSE)


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Ecu Power Source Circuit

  1. Remove the integration relay from the engine room R/B and J/B.

  1. Inspect the AM2 fuse.

    1. Remove the AM2 fuse from the integration relay.

    2. Measure the resistance of the AM2 fuse.

      Standard resistance:
      Below 1 Ω

    3. Reinstall the AM2 fuse.

  1. Inspect the IG2 relay.

    1. Measure the resistance between the terminals shown below.

      Standard resistance:
      Tester Connections
      		Specified Conditions
      1C-1-1B-4
      		10 kΩ or higher
      Below 1 Ω (when battery voltage is applied to terminals 1B-2 and 1B-3)
      1C-1-1B-1
      		Below 1 Ω

    2. Reinstall the integration relay.



NG
REPLACE INTEGRATION RELAY (YARIS_NCP93 RM000001CMT04GX.html)
OK


4.INSPECT IGNITION SWITCH ASSEMBLY


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Ecu Power Source Circuit

  1. Disconnect the D8 ignition switch connector.

  1. Measure the resistance between the terminals shown below.

    Standard resistance:
    Key Position
    		Tester Connection
    		Specified Condition
    LOCK
    		-
    		10 kΩor higher
    ACC
    		2-4
    		Below 1 Ω
    ON
    		1-2-4
    		Below 1 Ω
    5-6
    		Below 1 Ω
    START
    		1-3-4
    		Below 1 Ω
    5-6-7
    		Below 1 Ω

  1. Reconnect the D8 ignition switch connector.



NG
REPLACE IGNITION SWITCH ASSEMBLY (YARIS_NCP93 RM000000WC701WX.html)
OK


5.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY AND BODY GROUND)


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Ecu Power Source Circuit

  1. Disconnect the D23 transponder key ECU connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    D23-1 (+B) - Body ground
    		D23-1 (+B) - Body ground
    		11 to 14 V
    D23-2 (IG) - Body ground
    		Ignition switch OFF
    		 Below 1 V
    Ignition switch ON
    		11 to 14 V

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    D23-16 (GND) - Body ground
    		 Below 1 Ω

  1. Reconnect the D23 transponder key ECU connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY (YARIS_NCP93 RM000003BHZ005X.html)