Engine does not Start: Procedure

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

      OK

      off → on (ACC) → on (IG) → off

NG → See step   35 

OK: Go to next step 

1. Delete 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 key system (starting function) DTCs are output	B
   Steering lock DTCs are output	C
   Engine immobilizer 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. When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in the P position, check that depressing the brake pedal and pressing the engine switch crank the engine.

      Result

      Result	Proceed to
      Engine cranks	A
      Engine does not crank	B

A → See step   40 

B: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Read the DATA LIST according to the displays on the tester screen.
   ENGINE AND ECT:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Starter Control	Starter switch signal / ON or OFF	ON: Engine switch on (ST) OFF: Engine switch except on (ST)	-

   Standard

   Engine switch condition	Tester display
   When engine switch is on (ST)	ON
   When engine switch is except on (ST)	OFF

NG → See step   10 

OK: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Perform Active Test according to the prompts displayed on the tester.
   ENGINE AND ECT:
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Activate the Starter Relay	Starter	ON or OFF	-

4. Measure the voltage according to the value(s) in the table below.
   Fig 1: Measuring Voltage Of Starter Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   Starter relay terminal 2 - Starter relay terminal 1	When starter relay is ON by Active test using Techstream	8 to 14 V
   Starter relay terminal 2 - Starter relay terminal 1	When starter relay is OFF by Active test using Techstream	Below 1 V

NG → See step   20 

OK: Go to next step 

1. Remove the starter relay from the engine room relay block.
   Fig 2: Measuring Resistance Of Starter Relay

   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 terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1 Ω

NG → REPLACE STARTER RELAY 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 3: Measuring Voltage Of Starter Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   Starter relay terminal 5 - Body ground	Always	11 to 14 V

2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   Starter relay terminal 1 - Body ground	Always	Below 1Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE FUSE 

OK: Go to next step 

1. Disconnect the B12 connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   Engine room relay block starter relay terminal 3 - B12-1	Always	Below 1 Ω
   Engine room relay block starter relay terminal 3 or B12-1 - Body ground	Always	10 kΩ or higher

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

OK: Go to next step 

1. Disconnect the C1 connector.
   Fig 4: Checking Harness And Connector (Battery - Starter)

   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
   C1-1 - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER) 

OK → REPLACE STARTER ASSEMBLY 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Read the DATA LIST according to the displays on the tester screen.
   MAIN BODY:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   N SW / C 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   14 

OK: Go to next step 

1. Connect Techstream to the DLC3.

   HINT: 

   When using 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 tester and vehicle starts.

2. Turn the engine switch on (IG).
   SMART KEY:
   
   

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

   OK

   "OK" is displayed on the screen.

NG → See step   24 

OK: Go to next step 

1. Connect Techstream to the DLC3.

   HINT: 

   When using 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 tester and vehicle starts.

2. Turn the engine switch on (IG).
   SMART KEY:
   
   

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

   OK

   "OK" is displayed on the screen.

NG → See step   29 

OK: Go to next step 

1. Connect Techstream to the DLC3.

   HINT: 

   When using 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 tester and vehicle starts.

2. Turn the engine switch on (IG).
   IMMOBILIZER:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Immobilizer	Immobilizer system status / SET or UNSET	UNSET: Engine switch ON SET: Without key	-

   OK

   UNSET (Engine switch ON) appears on the screen.

NG → See step   34 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Disconnect the D8 connector from the main body ECU (instrument panel junction block).
   Fig 5: Checking Harness And Connector (Main Body ECU - Body Ground)

   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
   D8-8 (STR) - Body ground	Shift position is P or N	105 to 115 Ω
   D8-8 (STR) - Body ground	Shift position is not P nor N	10 kΩ or higher

NG → See step   15 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Disconnect the B5 connector.
   Fig 6: Measuring Resistance Of Park/Neutral Position Switch

   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	P	Below 1Ω
   4 - 5	N	Below 1Ω
   4 - 5	Except P and N	10 kΩ or higher

NG → See step   41 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D8-8 (STR) - B5-4	Always	Below 1Ω
   D8-8 (STR) or B5-4 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - PARK/NEUTRAL POSITION SWITCH) 

OK: Go to next step 

1. Disconnect the D60 connector from the ECM.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   B5-5 - D60-10 (STA)	Always	Below 1Ω
   B5-5 or D60-10 (STA) - Body ground	Always	10 kΩ or higher

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

OK: Go to next step 

1. Remove the starter relay from engine room relay block.
   Fig 7: Measuring Resistance Of Starter Relay

   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 terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1Ω

NG → REPLACE STARTER RELAY 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   Engine room relay block starter relay terminal 2 - D60-10 (STA)	Always	Below 1Ω
   Engine room relay block starter relay terminal 2 or D60-10 (STA) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - STARTER RELAY) 

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

1. Remove the starter cut relay from the engine room relay block.
   Fig 8: Measuring Resistance Of CUT Relay

   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 applied to terminals 1 and 2	Below 1Ω
   3 - 5	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher

NG → REPLACE STARTER CUT RELAY 

OK: Go to next step 

1. Disconnect the B49 connector from the ECM.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   Engine room relay block starter cut relay terminal 5 - B49-31 (STAR)	Always	Below 1Ω
   Engine room relay block starter cut relay terminal 5 or B49-31 (STAR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER CUT RELAY - ECM) 

OK: Go to next step 

1. Disconnect the D10 connector from the main body ECU (instrument panel junction block).
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   Engine room relay block starter cut relay terminal 5 - D10-6 (STR2)	Always	Below 1Ω
   Engine room relay block starter cut relay terminal 5 or D10-6 (STR2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER CUT RELAY - MAIN BODY ECU) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   Engine room relay block starter relay terminal 2 - D60-10 (STA)	Always	Below 1Ω
   Engine room relay block starter relay terminal 2 or D60-10 (STA) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - STARTER RELAY) 

OK → See step   42 

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

NEXT: 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 the P position, check that depressing the brake pedal and pressing the engine switch crank the engine.

      Result

      Result	Proceed to
      Engine does not crank	A
      Engine cranks	B

B → END 

A: Go to next step 

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. When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in the P position, check that depressing the brake pedal and pressing the engine switch crank the engine.

      Result

      Result	Proceed to
      Engine does not crank	A
      Engine cranks	B

B → END 

A → See step   43 

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

NEXT: 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 the P position, check that depressing the brake pedal and pressing the engine switch crank the engine.

      Result

      Result	Proceed to
      Engine does not crank	A
      Engine cranks	B

B → END 

A: Go to next step 

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

NEXT: Go to next step 

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

NEXT: 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 the P position, check that depressing the brake pedal and pressing the engine switch crank the engine.

      Result

      Result	Proceed to
      Engine does not crank	A
      Engine cranks	B

B → END 

A → See step   44 

1. Connect Techstream to the DLC3.

   HINT: 

   When using 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 tester and vehicle starts.

2. Turn the engine switch on (IG).
   SMART KEY:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Start Rqst	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   45 

OK → See step   46