Starter Signal Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Starter Signal.
5. Read the value displayed on the Techstream when the engine switch is turned on (IG) and the engine is started.

   OK

   Condition	Tester Display
   Engine switch on (IG)	Close
   Engine started	Open

NG → See step   2 

OK → See step   8 

1. Remove the ST relay from the engine room relay block.
   Fig 1: ST Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

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

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Room Relay Block

   HINT: 

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

3. Reinstall the ST relay.

NG → See step   3 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH) 

1. Remove the ST relay 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
   1 (ST relay terminal) - D8-9	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   1 (ST relay terminal) or D8-9 - Body ground	Always	10 kΩ or higher

4. Reinstall the ST relay.
5. Reconnect the park/neutral position switch connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH) 

OK: Go to next step 

1. Inspect the park/neutral position switch assembly. Refer to INSPECTION for 2WD. Refer to INSPECTION for AWD).

   Result

   Result	Proceed to
   OK	A
   NG (for 2WD)	B
   NG (for AWD)	C

B → See step   10 

C → See step   11 

A: Go to next step 

1. Disconnect the power management control ECU connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   F7-3 (STAR) - D1-120 (NSW)	Always	Below 1 Ω

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   F7-3 (STAR) or D1-120 (NSW) - body ground	Always	10 kΩ or higher

4. Reconnect the power management control ECU connector.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - ECM) 

OK: Go to next step 

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
   D8-4 - F7-3 (STAR)	Always	Below 1 Ω
   D8-9 - F7-2 (STA)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D8-4 or F7-3 (STAR) - Body ground	Always	10 kΩ or higher
   D8-9 or F7-2 (STA) - Body ground	Always	10 kΩ or higher

4. Reconnect the power management control ECU connector.
5. Reconnect the park/neutral position switch connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - POWER MANAGEMENT CONTROL ECU) 

OK: Go to next step 

1. Disconnect the ECM connector.
2. Disconnect the park/neutral position switch connector.
3. Remove the ST relay from the engine room relay block.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D8-9 or A43-46 (STA) - Body ground	Always	10 kΩ or higher

5. Reconnect the ECM connector.
6. Reconnect the park/neutral position switch connector.
7. Reinstall the ST relay.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) 

OK → See step   9