Starter Signal Circuit [08/2016 - 08/2019]: 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 and ECT / Data List / Starter Signal.
5. Read the value.

   OK

   Engine Switch Position	Starter Signal
   On (IG)	OFF
   START	ON

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )

Result: 

NG 

See step  2

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

   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
   Starter relay (ST) terminal 1 - Body ground	Engine cranking	11 to 14 V

   HINT: 

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

   TEXT IN ILLUSTRATION
   
   

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

3. Reinstall the starter relay (ST).

Result: 

NG 

See step  5

Result: 

OK 

See step  3

1. Inspect the starter relay (ST) (Refer to PROCEDURE - Step 8 ).

Result: 

NG 

REPLACE STARTER RELAY (ST) 

Result: 

OK 

See step  4

1. Remove the starter relay (ST) 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 2 - Body ground	Always	Below 1 Ω

3. Reinstall the starter relay (ST).

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER RELAY (ST) - BODY GROUND) 

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

   Tester Connection	Condition	Specified Condition
   Starter relay (ST) terminal 1 - C33-5	Always	Below 1 Ω
   Starter relay (ST) terminal 1 or C33-5 - Body ground	Always	10 kΩ or higher

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Inspect the park/neutral position switch assembly (Refer to PROCEDURE - Step 1 ).

Result: 

NG 

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  7

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

   Tester Connection	Condition	Specified Condition
   C33-4 - G38-3 (STAR)	Always	Below 1 Ω
   C33-4 or G38-3 (STAR) - Body ground	Always	10 kΩ or higher

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

Result: 

OK 

GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR