Engine does not Start: Procedure

1. Shift lever is in P.
2. Open and close the driver's 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   2 

OK → END (INITIALIZATION WAS DEFECTIVE) 

1. Check 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.

      OK

      off → on (ACC) → on (IG) → off

NG → See step   34 

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 immobilizer system DTCs are output	D
   Vehicle stability control system DTCs are output	E

E → See step   38 

D → See step   37 

C → See step   36 

B → See step   35 

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 crank the engine.

      OK

      Engine cranks.

NG → See step   10 

OK: Go to next step 

1. Connect the Techstream to the DLC3.

   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.

2. Turn the engine switch on (IG).
3. 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: Received NG: Not received	-

   OK

   "OK" (received) and "NG" (not received) appear on the screen.

NG → See step   22 

OK: Go to next step 

1. Replace ID code box (immobilizer code ECU). Refer to REMOVAL .

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. Shift lever is in P.
2. Open and close the driver's 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   39 

OK → END (ID CODE BOX (IMMOBILIZER CODE ECU IS 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   40 

OK: Go to next step 

1. Connect the Techstream to the DLC3.

   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.

2. Turn the engine switch on (IG).
3. 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 check/OK or NG	OK: Normal NG: Malfunction	-

   OK

   "OK" is displayed on the screen.

NG → See step   22 

OK: Go to next step 

1. Connect the Techstream to the DLC3.

   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.

2. Turn the engine switch on (IG).
3. 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 check/OK or NG	OK: Normal NG: Malfunction	-

   OK

   "OK" is displayed on the screen.

NG → See step   17 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Check the result when the engine switch is turned on (IG) and the engine is started.
   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.

NG → See step   27 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Read the Data List according to the displays 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 position is P or N OFF: Shift position is not P nor N	-

   OK

   "ON" (Shift position is P or N) and "OFF" (Shift position is not P nor N) appear on the screen.

NG → See step   30 

OK: Go to next step 

1. Disconnect the J55 connector from power source control ECU.
   Fig 1: Identifying J55 Connector Terminal And Power Source Control ECU Connector Terminal

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J55-39 (STSW) - A5-27 (STSW)	Always	Below 1 Ω
   J55-39 (STSW) or A5-27 (STSW)	Always	10 kΩ or higher

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: Identifying J55 Connector Terminal

   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
   A5-27 (STSW) - Body ground	Brake pedal depressed, engine switch hold on (ST)	Output voltage at terminals AM1 or AM2 is -2 V or more.

NG → REPLACE POWER SOURCE CONTROL ECU 

OK → See step   41 

1. Register the key. Refer to REGISTRATION .

NEXT: Go to next step 

1. Shift lever is in P.
2. Open and close the driver's 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   19 

OK → END 

1. Replace steering lock actuator. Refer to DISASSEMBLY .

NEXT: Go to next step 

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

NEXT: Go to next step 

1. Shift lever is in P.
2. Open and close the driver's 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   42 

OK → END (STEERING LOCK ECU DEFECTIVE) 

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

NEXT: Go to next step 

1. Shift lever is in P.
2. Open and close the driver's 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   24 

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 - Step 3 .

NEXT: Go to next step 

1. Shift lever is in P.
2. Open and close the driver's 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   43 

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

1. Remove the STOP SW fuse from main body ECU RH (cowl side junction block RH).
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified condition
   STOP SW fuse	Always	Below 1 Ω

NG → REPLACE STOP SW FUSE 

OK: Go to next step 

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

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

NG → See step   44 

OK: Go to next step 

1. Disconnect the J55 connector from the power source control ECU.
   Fig 4: Identifying Stop Light Switch And Power Source Control ECU Connector Terminal

   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

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

OK → REPLACE POWER SOURCE CONTROL ECU 

1. Remove the starter relay from engine room relay block No. 1.
   Fig 5: Identifying ST CUT Relay 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
   3 - 5	When battery voltage is not applied to terminal 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminal 1 and 2	Below 1 Ω

NG → REPLACE STARTER RELAY 

OK: Go to next step 

1. Disconnect the E45 connector from park/neutral position switch.
   Fig 6: Identifying E45 Connector Terminal

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

   Standard Resistance

   Tester Connection	Shift Position	Specified Condition
   4 - 5	P	Below 1 Ω
   4 - 5	N	Below 1 Ω
   4 - 5	Except N or P	10 kΩ or higher

NG → See step   45 

OK: Go to next step 

1. Disconnect the J55 connector.
   Fig 7: Identifying J55 Connector Terminal

   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

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: Identifying Starter Relay Terminals And E45 Connector Terminal

   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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE POWER SOURCE CONTROL ECU