Starter Signal Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
5. Check the result when the ignition switch is turned ON and the engine starts.

   OK

   Condition	Starter Signal
   Ignition switch ON	Close
   Engine start	Open

   RESULT
   
   

   Result	Proceed to
   Outside standard range (for manual transmission models)	A
   Outside standard range (for automatic transmission models)	B
   Within standard range (for manual transmission models)	C
   Within standard range (for automatic transmission models)	D

D → See step   9 

C → See step   5 

B → See step   6 

A: Go to next step 

Fig 1: Identifying Clutch Start Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the clutch start switch.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	ON (pushed)	Below 1 Ω
   1 - 2	OFF (free)	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Clutch Start Switch)

NG → See step   12 

OK: Go to next step 

Fig 2: Identifying Ignition Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the ignition switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   2 (AM1) - 1 (ST1)	START position	Below 1 Ω

NG → See step   13 

OK: Go to next step 

1. Disconnect the ignition switch connector.
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
   A1-1 (ST1) - A9-1	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A1-1 (ST1) or A9-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the STA relay from the engine room relay block.
2. Disconnect the ECM connector.
3. Disconnect the clutch start switch connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   1 (STA relay) - E77-10 (STA)	Always	Below 1 Ω
   1 (STA relay) - A9-2	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   E77-10 (STA) or A9-2 - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   Outside standard range	A
   Within standard range	B

B → See step   10 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying Park/Neutral Position Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the park/neutral position switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   4 - 5	Shift position P, N	Below 1 Ω
   4 - 5	Shift position not P, N	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Park/Neutral Position Switch Assembly)

NG → See step   14 

OK: Go to next step 

Fig 4: Identifying Ignition Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the ignition switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   2 (AM1) - 1 (ST1)	START position	Below 1 Ω

NG → See step   15 

OK: Go to next step 

1. Disconnect the ignition switch connector.
2. Disconnect the park/neutral position switch assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A1-1 (ST1) - B35-4	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A1-1 (ST1) or B35-4 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

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

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   1 (STA relay) - E77-10 (STA)	Always	Below 1 Ω
   1 (STA relay) - B35-5	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   E77-10 (STA) or B35-5 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Check that the battery is not depleted.

   OK

   Battery is not depleted.

NG → REPLACE BATTERY 

OK: Go to next step 

1. Check that the battery terminals are not loose or corroded.

   OK

   Battery terminals are not loose or corroded.

NG → REPAIR OR REPLACE BATTERY TERMINAL 

OK → REPAIR OR REPLACE STARTER CIRCUIT (STARTER - STA RELAY)