Sfi System Ecm Power Source Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

INSPECT NO. 1 INTEGRATION RELAY (EFI RELAY)

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

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

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

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

INSPECT NO. 1 INTEGRATION RELAY (IG2 RELAY)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (IG2 RELAY) - ECM)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (IG2 RELAY) - BATTERY)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (IG2 RELAY) - BODY GROUND)

CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 1 INTEGRATION RELAY)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (IG2 RELAY) - IGNITION SWITCH)

INSPECT IGNITION SWITCH ASSEMBLY

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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
   C153-3 (E1) - Body ground	Always	Below 1 Ω

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   G180-8 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

   Text in Illustration

   *a	Rear view of wire harness connector (to ECM)

1. Inspect the NO. 1 integration relay (EFI relay) (LandCruiser RM000003BLB03PX_01_0014.html).
   

1. Remove the NO. 1 integration relay (EFI relay) from the engine room relay block.
   

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
   1B-4 - G180-1 (+B)	Always	Below 1 Ω
   1B-4 - G180-2 (+B2)	Always	Below 1 Ω
   1B-4 or G180-1 (+B) - Body ground	Always	10 kΩ or higher
   1B-4 or G180-2 (+B2) - Body ground	Always	10 kΩ or higher

1. Remove the NO. 1 integration relay (EFI relay) from the engine room relay block.
   

2. Disconnect the cable from the negative (-) battery terminal.
   

3. Disconnect the cable from the positive (+) battery terminal.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1C-1 - Positive battery terminal	Always	Below 1 Ω
   1C-1 or Positive battery terminal - Body ground	Always	10 kΩ or higher

1. Remove the NO. 1 integration relay (EFI relay) from the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1B-3 - Body ground	Always	Below 1 Ω

1. Disconnect the ECM connector.
   

2. Remove the integration relay (EFI relay) from the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1B-2 - G181-6 (MREL)	Always	Below 1 Ω
   1B-2 or G181-6 (MREL) - Body ground	Always	10 kΩ or higher

1. Inspect the NO. 1 integration relay (IG2 relay) (LandCruiser RM000003BLB03PX_01_0002.html).
   

1. Disconnect the ECM connector.
   

2. Remove the NO. 1 integration relay (IG2 relay) from the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1A-5 - G180-8 (IGSW)	Always	Below 1 Ω
   1A-5 or G180-8 (IGSW) - Body ground	Always	10 kΩ or higher

1. Remove the NO. 1 integration relay (IG2 relay) from the engine room relay block.
   

2. Disconnect the cable from the negative (-) battery terminal.
   

3. Disconnect the cable from the positive (+) battery terminal.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1C-1 - Positive battery terminal	Always	Below 1 Ω
   1C-1 or Positive battery terminal - Body ground	Always	10 kΩ or higher

1. Remove the NO. 1 integration relay (IG2 relay) from the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1A-3 - Body ground	Always	Below 1 Ω

1. Confirm the entry and start system.
   
   

   Result

   Result	Proceed to
   w/ Entry and Start System	A
   w/o Entry and Start System	B

1. Remove the No. 1 integration relay from the engine room relay block.
   

2. Disconnect the power management control ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   G50-8 (IG2D) - 1A-1	Always	Below 1 Ω
   G50-8 (IG2D) or 1A-1 - Body ground	Always	10 kΩ or higher

1. Disconnect the ignition switch connector.
   

2. Remove the NO. 1 integration relay (IG2 relay) from the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1A-1 - G2-6 (IG2)	Always	Below 1 Ω
   1A-1 or G2-6 (IG2) - Body ground	Always	10 kΩ or higher

1. Inspect the ignition switch assembly (LandCruiser RM00000474M00DX.html).