Sfi System Starter Signal Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (STARTER SIGNAL)

CHECK STARTER RELAY (ST) (POWER SOURCE)

INSPECT STARTER RELAY (ST)

CHECK HARNESS AND CONNECTOR (STARTER RELAY (ST) - BODY GROUND)

CHECK HARNESS AND CONNECTOR (STARTER RELAY (ST) - CLUTCH START SWITCH)

CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - POWER MANAGEMENT CONTROL ECU)

INSPECT CLUTCH START SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (STARTER RELAY (ST) - PARK/NEUTRAL POSITION SWITCH)

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - POWER MANAGEMENT CONTROL ECU)

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

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

HINT:

This chart is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to the problem symptoms table (LandCruiser RM000000PDG103X.html).

1. Connect the GTS to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Turn the GTS on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
   

5. Read the value.
   
   

   OK:

   
   

   Engine Switch Position	Starter Signal
   ON	OFF
   START	ON

1. Remove the starter relay (ST) from the engine room relay block.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   Starter relay (ST) terminal 5 - Body ground	Engine cranking	11 to 14 V

   HINT:

   The engine does not crank because the relay is not installed.

   Result

   Result		Proceed to
   OK		A
   NG	for Manual transmission	B
   	for Automatic transmission	C

   Text in Illustration

   *1	Engine Room Relay Block
   *2	Starter relay (ST)

3. Reinstall the starter relay (ST).
   

1. Inspect the starter relay (ST) (LandCruiser RM000001FFP05FX_01_0001.html).
   

1. Remove the ST 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
   Starter relay (ST) terminal 1 - Body ground	Always	Below 1 Ω

3. Reinstall the starter relay (ST).
   

1. Remove the starter relay (ST) from the engine room relay block.
   

2. Disconnect the clutch start switch connector.
   

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

   Standard Resistance (Check for Open):

   Tester Connection	Condition	Specified Condition
   ST relay terminal 2 - A40-1	Always	Below 1 Ω

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   Starter relay (ST) terminal 2 or A40-1 - Body ground	Always	10 kΩ or higher

4. Reinstall the starter relay (ST).
   

5. Reconnect the clutch start switch connector.
   

1. Disconnect the clutch start switch connector.
   

2. Disconnect the power management control ECU connector.
   

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

   Standard Resistance (Check for Open):

   Tester Connection	Condition	Specified Condition
   A40-2 - G50-3 (STAR)	Always	Below 1 Ω

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   A40-2 or G50-3 (STAR) - Body ground	Always	10 kΩ or higher

4. Reconnect the clutch start switch connector.
   

5. Reconnect the power management control ECU connector.
   

1. Inspect the clutch start switch assembly (LandCruiser RM0000032S300DX_01_0001.html).
   

1. Remove the starter relay (ST) from the engine room relay block.
   

2. Disconnect the park/neutral position switch connector.
   

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

   Standard Resistance (Check for Open):

   Tester Connection	Condition	Specified Condition
   Starter relay (ST) terminal 2 - C159-5	Always	Below 1 Ω

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   Starter relay (ST) terminal 2 or C159-5 - Body ground	Always	10 kΩ or higher

4. Reinstall the starter relay (ST).
   

5. Reconnect the park/neutral position switch connector.
   

1. Disconnect the park/neutral position switch connector.
   

2. Disconnect the power management control ECU connector.
   

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

   Standard Resistance (Check for Open):

   Tester Connection	Condition	Specified Condition
   C159-4 - G50-3 (STAR)	Always	Below 1 Ω

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   C159-4 or G50-3 (STAR) - Body ground	Always	10 kΩ or higher

4. Reconnect the park/neutral position switch connector.
   

5. Reconnect the power management control ECU connector.
   

1. Inspect the park/neutral position switch assembly (LandCruiser RM000000OD401HX.html).