Sfi System (For Hatchback) Ecm Power Source Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT NO. 1 INTEGRATION RELAY (POWER SOURCE VOLTAGE)

INSPECT NO. 1 INTEGRATION RELAY (EFI RELAY AND IG2 RELAY)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW TERMINAL VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - NO. 1 INTEGRATION RELAY)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - IGNITION SWITCH - BODY GROUND)

INSPECT IGNITION SWITCH

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   
2. After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work (YARIS_NCP93 RM00000482L007X.html).
   

1. Remove the No. 1 integration relay.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   1C-1 - Body ground	Always	11 to 14 V

   Text in Illustration

   *a	Front view of wire harness connector (to No. 1 Integration Relay)

1. Remove the No. 1 integration relay.
   

2. Inspect the relay
   

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

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      1C-1 - 1E-4	Battery voltage not applied	10 kΩ or higher
      	Battery voltage applied to terminals 1D-7 and 1E-10	Below 1 Ω
      1C-1 - 1D-9	Battery voltage not applied	10 kΩ or higher
      	Battery voltage applied to terminals 1D-17 and 1E-10	Below 1 Ω

      Text in Illustration

      *a	Component without harness connected (No. 1 Integration Relay)

1. Remove the No. 1 integration relay.
   

2. Disconnect the ECM connector.
   

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

   Standard Resistance:

   
   

   Tester Connection	Condition	Specified Condition
   A72-46 (MREL) - 1D-7	Always	Below 1 Ω
   A72-2 (+B) - 1E-4	Always	Below 1 Ω
   A72-3 (+B2) - 1E-4	Always	Below 1 Ω
   A72-46 (MREL) or 1D-7 - Body ground	Always	10 kΩ or higher
   A72-2 (+B) or 1E-4 - Body ground	Always	10 kΩ or higher
   A72-3 (+B2) or 1E-4 - Body ground	Always	10 kΩ or higher

1. Disconnect the ECM connector.
   

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

   Standard Resistance:

   
   

   Tester Connection	Condition	Specified Condition
   C51-16 (E1) - Body ground	Always	Below 1 Ω

1. Disconnect the ECM connectors.
   

2. Turn the ignition switch to ON.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   A72-37 (IGSW) - C51-16 (E1)	Ignition switch ON	11 to 14 V

1. Remove the No. 1 integration relay.
   

2. Disconnect the ECM connector.
   

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

   Standard Resistance:

   
   

   Tester Connection	Condition	Specified Condition
   A72-37 (IGSW) - 1D-9	Always	Below 1 Ω
   A72-37 (IGSW) or 1D-9 - Body ground	Always	10 kΩ or higher

1. Remove the No. 1 integration relay.
   

2. Disconnect the ignition switch assembly connector.
   

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

   Standard Resistance:

   
   

   Tester Connection	Condition	Specified Condition
   1D-17 - D109-6 (IG2)	Always	Below 1 Ω
   1E-10 - Body ground	Always	Below 1 Ω
   1D-17 or D109-6 (IG2) - Body ground	Always	10 kΩ or higher

1. Inspect the ignition switch (YARIS_NCP93 RM000000X2S02EX.html).