Engine does not Start: Procedure

1. Check the power source mode changes.
   1. for AT:

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

      for MT:

      When the key is inside the vehicle, check that the power source mode changes.

      OK

      off → on (ACC) → on (IG) → off

NG → See step   35 

OK: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Check for DTCs again.
3. Proceed to the next step based on the inspection result.
   RESULT
   
   

   Result	Proceed to
   No DTC is output	A
   Smart access system with push-button start (for start function) DTCs are output	B
   Steering lock system DTCs are output	C
   Engine immobiliser system DTCs are output	D
   Vehicle stability control system DTCs are output	E

B → See step   36 

C → See step   37 

D → See step   38 

E → See step   39 

A: Go to next step 

1. Check the engine cranking function.
   1. for AT:

      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 crank the engine.

      for MT:

      When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

      OK

      Engine cranks.

NG → See step   9 

OK: Go to next step 

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 / Smart Access / Data List.
5. Read the Data List according to the display on the Techstream.

   HINT: 

   When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

   SMART ACCESS
   
   

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

   OK

   "OK" (received) and "NG" (not received) appear on the screen according to vehicle operating conditions.

NG → See step   21 

OK: Go to next step 

1. Replace the ID code box (immobiliser code ECU). Refer to REGISTRATION .

NEXT: Go to next step 

1. Register the recognition code (ECU code). Refer to REGISTRATION .

NEXT: Go to next step 

1. Register the ECU communication ID. Refer to REGISTRATION .

NEXT: Go to next step 

1. Check the engine cranking function.
   1. for AT:

      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 crank the engine.

      for MT:

      When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

      OK

      Engine can be started.

NG → See step   40 

OK → END (ID CODE BOX (IMMOBILISER CODE ECU WAS DEFECTIVE) 

1. Check if the steering lock is released when turning the engine switch on (ACC).

   OK

   The steering lock is released.

NG → See step   41 

OK: Go to next step 

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 / Smart Access / Data List.
5. Read the Data List according to the display on the Techstream.

   HINT: 

   When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	S code check/OK or NG	OK: Normal NG: Malfunction	-

   OK

   "OK" is displayed on the screen.

NG → See step   21 

OK: Go to next step 

1. Read the Data List according to the display on the Techstream.

   HINT: 

   When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	L code check/OK or NG	OK: Normal NG: Malfunction	-

   RESULT
   
   

   Result	Proceed to
   "NG" is displayed on the screen (for AT).	A
   "NG" is displayed on the screen (for MT).	B
   "OK" is not displayed on the screen.	C

   OK

   "OK" is displayed on the screen.

B → See step   13 

C → See step   16 

A: Go to next step 

1. Read the Data List according to the display on the Techstream.
   SMART KEY
   
   

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

   OK

   OK (brake pedal depressed) and OFF (brake pedal released) appear on the screen according to vehicle operating conditions.

NG → See step   26 

OK: Go to next step 

1. Enter the following menus: Body / 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
   Neutral SW	Park/Neutral position switch/ON or OFF	ON: Shift lever is in P or N OFF: Shift lever is not in P nor N	-

   RESULT
   
   

   Result	Proceed to
   "ON" (Shift lever is in P or N) or "OFF" (Shift lever is neither in P nor N) appears on the screen according to vehicle operating conditions.	A
   "ON" (Shift lever is in P or N) or "OFF" (Shift lever is neither in P nor N) does not appear on the screen according to vehicle operating conditions (for AT).	B
   "ON" (Shift lever is in P or N) or "OFF" (Shift lever is neither in P nor N) does not appear on the screen according vehicle operating conditions (for MT).	C

B → See step   30 

C → See step   32 

A: Go to next step 

1. Disconnect the J55 connector from the power source control ECU.
   Fig 1: J55 And A5 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A5 connector from the ECM.
3. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J55-39 (STSW) - A5-19 (STSW)	Always	Below 1 Ω
   J55-39 (STSW) or A5-19 (STSW) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Source Control ECU)
   *2	Front view of wire harness connector (to ECM)

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

OK: Go to next step 

1. Reconnect the J55 connector to the power source control ECU.
   Fig 2: A5 Connector Terminal Identification

   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
   A5-19 (STSW) - Body ground	Brake pedal depressed, engine switch hold on (ST)	Output voltage at terminals AM1 or AM2 is -2 V or more.

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to ECM)

NG → See step   42 

OK → See step   43 

1. Register the key. Refer to REGISTRATION .

NEXT: Go to next step 

1. The shift lever is in P.
2. Open and close the driver door with the engine switch off.
3. Check if the engine can be started.

   OK

   Engine can be started.

   HINT: 

   After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.

NG → See step   18 

OK → END 

1. Replace the steering lock actuator. Refer to DISASSEMBLY .

NEXT: Go to next step 

1. Register the recognition code (ECU code). Refer to REGISTRATION .

NEXT: Go to next step 

1. The shift lever is in P.
2. Open and close the driver door with the engine switch off.
3. Check if the engine can be started.

   OK

   Engine can be started.

   HINT: 

   After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.

NG → See step   44 

OK → END (STEERING LOCK ECU WAS DEFECTIVE) 

1. Register the recognition code (ECU code). Refer to REGISTRATION .

NEXT: Go to next step 

1. Check the engine cranking function.
   1. for AT:

      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 crank the engine.

      for MT:

      When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

      OK

      Engine can be started.

NG → See step   23 

OK → END 

1. Replace the certification ECU (smart key ECU assembly). Refer to REMOVAL .

NEXT: Go to next step 

1. Register the key. Refer to REGISTRATION .

NEXT: Go to next step 

1. Check the engine cranking function.
   1. for AT:

      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 crank the engine.

      for MT:

      When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

      OK

      Engine can be started.

NG → See step   45 

OK → END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) 

1. Remove the stop light switch. Refer to REMOVAL .
   Fig 3: Stop Light Switch Connector Terminal Identification

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

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Switch pin not pushed	Below 1 Ω
   	Switch pin pushed	10 kΩ or higher
   3 - 4	Switch pin not pushed	10 kΩ or higher
   	Switch pin pushed	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Stop Light Switch)
   *2	Free
   *3	Pushed in

NG → See step   46 

OK: Go to next step 

1. Disconnect the J55 connector from the power source control ECU.
   Fig 4: J55 And A22 Connector Terminal Identification

   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
   J55-1 (STP) - A22-1	Always	Below 1 Ω
   J55-1 (STP) or A22-1 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1

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

   *2

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - STOP LIGHT SWITCH) 

OK → See step   47 

1. Remove the starter relay from the engine room relay block No. 1.
   Fig 5: Starter Relay Connector Terminal Identification

   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 is not applied between terminals 1 and 2	10 MΩ or higher
   3 - 5	Battery voltage is applied between terminals 1 and 2	Below 1 Ω

3. Proceed to next step based on the inspection result.
   RESULT
   
   

   Result	Proceed to
   OK (for AT)	A
   OK (for MT)	B
   NG	C

B → See step   32 

C → REPLACE STARTER RELAY 

A: Go to next step 

1. Disconnect the E45 connector from the park/neutral position switch.
   Fig 6: Park/Neutral Position Switch Connector Terminal Identification

   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
   4 - 5	Shift lever is in P	Below 1 Ω
   4 - 5	Shift lever is in N	Below 1 Ω
   4 - 5	Shift lever is not in N or P	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   48 

OK: Go to next step 

1. Disconnect the J55 connector.
   Fig 7: J55 And E45 Connector Terminal Identification

   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
   J55-17 (STR1) - E45-4 (B)	Always	Below 1 Ω
   J55-17 (STR1) or E45-4 (B) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1

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

   *2

   Front view of wire harness connector (to Park/Neutral Position Switch)

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

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 8: Engine Room Relay Block No. 1 And E45 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   E45-5 (L) - Engine room relay block No. 1 STARTER relay terminal 1	Always	Below 1 Ω
   E45-5 (L) or Engine room relay block No. 1 STARTER relay terminal 1 - Body ground	Always	10 kΩ or higher
   Engine room relay block No. 1 STARTER relay terminal 2 - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1

   Component without relay connected (Engine Room Relay Block No. 1)

   *2

   Front view of wire harness connector (to Park/Neutral Position Switch)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   49 

1. Inspect the clutch pedal switch. Refer to INSPECTION .

NG → See step   50 

OK: Go to next step 

1. Disconnect the J55 connector.
   Fig 9: J55 And A24 Connector Terminal Identification

   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
   J55-17 (STR1) - A24-1	Always	Below 1 Ω
   J55-17 (STR1) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Source Control ECU)
   *2	Front view of wire harness connector (to Clutch Pedal Switch Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - CLUTCH START SWITCH) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 10: A24 Connector Terminal Identification And Engine Room Relay Block No. 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   A24-2 - Engine room relay block No. 1 STARTER relay terminal 1	Always	Below 1 Ω
   A24-2 - Body ground	Always	Below 1 Ω
   Engine room relay block No. 1 STARTER relay terminal 2 - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Clutch Pedal Switch)
   *2	Component without relay connected (Engine Room Relay Block No. 1)
   *3	STARTER Relay Terminal

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH START SWITCH - STARTER RELAY) 

OK → See step   51