Engine does not Start: Procedure

1. Place the electrical key on the driver seat.
2. Move the shift lever to P.
3. Depress the brake pedal.
4. Check that the engine switch indicator light is green. Then press the engine switch to check if the engine starts.

   OK

   Engine can be started.

NG → See step   2 

OK → END (ENGINE START PERMISSION CONDITIONS WERE NOT SATISFIED) 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / each ECU / Trouble Code.
5. Check for DTCs.

   OK

   DTC is not output.

NG → GO TO DIAGNOSTIC TROUBLE CODE CHART 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Smart key / Data List.
2. Read the Data List according to the display on the Techstream.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Power Supply Open	Open in ECU/NG (PAST) or OK	NG (Past): Open in ECU OK: No malfunction	-

   OK

   OK (No malfunction) appears on the screen.

NG → See step   23 

OK: Go to next step 

1. Check if the power source mode changes.
   1. When the key is inside the vehicle and the shift lever is in P, check that the power source mode changes.

      Result

      Result	Proceed to
      OK: off → on (ACC) → on (IG) → off	A
      Power source mode does not change to on (IG and ACC)	B
      Power source mode does not change to on (IG)	C
      Power source mode does not change to on (ACC)	D

B → See step   24 

C → See step   25 

D → See step   26 

A: Go to next step 

1. Check the engine cranking function.
   1. When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in P, check that depressing the brake pedal and pressing the engine switch cranks the engine.

      Result

      Result	Proceed to
      Engine does not cranks.	A
      Engine cranks (for 2GR-FE).	B
      Engine cranks (for 1AR- FE).	C

B → See step   27 

C → See step   28 

A: Go to next step 

1. Disconnect the B2 connector.
   Fig 1: Inspecting Park/Neutral Position Switch Assembly Connector Terminals

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B2-4 (B) - B2-9 (L)	Shift lever in P or N	Below 1 Ω
   B2-4 (B) - B2-9 (L)	Shift lever not in P or N	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Components without harness connected (Park/neutral Position Switch Assembly)

NG → See step   20 

OK: Go to next step 

1. Remove the ST relay from the engine room relay block.
   Fig 2: Identifying Relay Test Terminals

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Battery voltage not applied to terminals 1 and 2	10 kΩ or higher
   3 - 5	Battery voltage applied to terminals 1 and 2	Below 1 Ω

NG → See step   20 

OK: Go to next step 

1. Disconnect the D42 connector from the power management control ECU.
   Fig 3: Inspecting Power Management Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. The shift lever is in P or N.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D42-3 (STAR) - Body ground	Always	93.8 to 136.4 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Management Control ECU)

NG → See step   20 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Power Source Control / Data List.
2. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Stop Light Switch1	Stop light switch 1/ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   OK

   ON (brake pedal depressed) and OFF (brake pedal released) appear on the screen.

NG → See step   16 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Power Source Control / Date List.
2. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Steering Unlock Switch	Steering unlock condition/ON or OFF	ON: Steering is unlocked OFF: Steering is locked	-

   OK

   ON (steering is unlocked) and OFF (steering is unlocked) appear on the screen.

NG → See step   18 

OK: Go to next step 

1. Turn the engine switch from off to on (ACC) and check that the steering lock moves to the unlocked position when the engine switch is on (ACC).

   OK

   Lock moves to unlocked position.

NG → See step   29 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Smart Key / Data List.
2. Read the Data List according to the display on the Techstream.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	L code certification result/OK or NG	OK: L code certification result normal NG: L code certification result abnormal	-

   OK

   OK appear on the screen.

NG → See step   30 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Smart key / Data List.
2. Read the Data List according to the display on the Techstream.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Start Request	Start request signal response/OK or NG	OK: Start request condition signal received NG: Start request condition signal not received	-

   OK

   OK appear on the screen.

NG → REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Smart key / Data List.
2. Read the Data List according to the display on the Techstream.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	S code certification result/OK or NG	OK: S code certification result normal NG: S code certification result abnormal	-

   OK

   OK (S code certification result normal) appears on the screen.

NG → See step   31 

OK: Go to next step 

1. Enter the following menu: Body Electrical / Power Source Control / Data List.
2. Read the Data List according to the value(s) in the table below.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Specified Condition
   Starter Request Signal	Starter request signal monitor/ON or OFF	ON: ST relay is ON OFF: ST relay is OFF	Engine switch pressed and held with shift lever in P or N

   Result

   Result	Proceed to
   ON (ST relay on) and OFF (ST relay off) do not appear on the screen.	A
   ON (ST relay on) and OFF (ST relay off) appear on the screen (for 2GR-FE).	B
   ON (ST relay on) and OFF (ST relay off) appear on the screen (for 1AR-FE).	C

B → See step   33 

C → See step   34 

A → See step   32 

NG → See step   35 

OK: Go to next step 

1. Disconnect the D42 connector from the power management control ECU.
   Fig 4: Inspecting Power Management Control ECU And Stop Light Switch Connectors

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D42-10 (STP1) - A35-1	Always	Below 1 Ω
   D42-10 (STP1) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1

   Front view of wire harness connector (to Power Management Control ECU)

   *2

   Front view of wire harness connector (to Stop Light Switch Assembly)

3. Reconnect the D42 connector to the power management control ECU.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D42-10 (STP1) - Body ground	Brake pedal released	Below 1 V
   D42-10 (STP1) - Body ground	Brake pedal depressed	Output voltage at terminal AM21 or AM22 -2.5 V or more

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   36 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the D17 connector to the steering lock actuator assembly (steering lock ECU).
   Fig 5: Inspecting Steering Lock Actuator Assembly Connector Terminals

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D17-4 (SLP1) - Body ground	Steering lock	10 kΩ or higher
   D17-4 (SLP1) - Body ground	Steering unlock	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (Steering Lock Actuator (Steering Lock ECU Assembly))

NG → See step   37 

OK → See step   38 

1. Replace with a new or normally functioning part. Repair or replace any damaged wire harness or connector.

NEXT: Go to next step 

1. Enter the following menus: Body Electrical / Power Source Control / Data List.
2. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Starter Request Signal	Starter request signal monitor/ON or OFF	ON: ST relay is on OFF: ST relay is off	-

   NOTE:

   Check that the engine switch indicator is illuminated in green and push the engine switch.

   OK

   ON (ST relay on) and OFF (ST relay off) appear on the screen.

NG → See step   39 

OK: Go to next step 

1. Place the electrical key on the driver seat.
2. Move the shift lever to P.
3. Depress the brake pedal.
4. Check that the engine switch indicator light is green. Then press the engine switch to check if the engine starts.

   OK

   Engine can be started.

NG → CHECK HARNESS AND CONNECTOR (MALFUNCTION IN RELAY CONTACT SIDE CIRCUIT) 

OK → END