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 P, 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 key system (for start 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 P, 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 the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Read the Data List according to the displays on the Techstream 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 the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Perform Active Test according to the prompts displayed on the Techstream.
   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: Identifying Starter Relay Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Relay block No. 8 starter relay terminal 2 - Relay block No. 8 starter relay terminal 1	When starter relay is ON by Active test using Techstream	8 to 14 V
   Relay block No. 8 starter relay terminal 2 - Relay block No. 8 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 relay block No. 8.
   Fig 2: Inspecting 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	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: Identifying Starter Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Relay block No. 8 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
   Relay block No. 8 starter relay terminals 1 - Body ground	Always	Below 1 Ω

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

OK: Go to next step 

1. Disconnect the B8 connector.
   Fig 4: Identifying B8 Connector And Starter Relay 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
   Relay block No. 8 starter relay terminal 3 - B8-1	Always	Below 1 Ω
   Relay block No. 8 starter relay terminal 3 or B8-1 - 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 B4 connector.
   Fig 5: Locating Starter Connector

   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
   B4-1 - Body ground	Always	11 to 14 V

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

OK → REPLACE STARTER ASSEMBLY 

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 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 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 displays on the Techstream.
   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 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 displays on the Techstream.
   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 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 displays on the Techstream.
   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 E52 connector from the main body ECU (instrument panel junction block).
   Fig 6: Identifying E52 Connector (instrument panel junction block)

   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
   E52-3 (STR) - Body ground	Shift position is P or N	105 to 115 Ω
   E52-3 (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 B88 connector.
   Fig 7: Inspecting B88 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
   4 - 5	P	Below 1 Ω
   4 - 5	N	Below 1 Ω
   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.
   Fig 8: Identifying E52 & B88 Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E52-3 (STR) - B88-4	Always	Below 1 Ω
   E52-3 (STR) or B88-4 - 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 E50 connector from the ECM.
   Fig 9: Identifying E50 ECM Connector

   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
   B88-4 - A50-48 (STA)	Always	Below 1 Ω
   B88-4 or A50-48 (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 10: Inspecting 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	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 resistance according to the value(s) in the table below.
   Fig 11: Identifying Harness A50 Connector & Starter Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Engine room relay block starter relay terminal 2 - A50-48 (STA)	Always	Below 1 Ω
   Engine room relay block starter relay terminal 2 or A50-48 (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 12: Inspecting 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 applied to terminals 1 and 2	Below 1 Ω
   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 A50 connector from the ECM.
   Fig 13: Identifying Harness A50 Connector & Starter Cut Relay 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
   Engine room relay block starter cut relay terminal 5 - A50-25 (STAR)	Always	Below 1 Ω
   Engine room relay block starter cut relay terminal 5 or A50-25 (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 E52 connector from the main body ECU (instrument panel junction block).
   Fig 14: Identifying Harness E52 Connector & Starter Cut Relay 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
   Engine room relay block starter cut relay terminal 5 - E52-14 (STR2)	Always	Below 1 Ω
   Engine room relay block starter cut relay terminal 5 or E52-14 (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.
   Fig 15: Identifying Harness A50 Connector & Starter Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Engine room relay block starter relay terminal 2 - A50-48 (STA)	Always	Below 1 Ω
   Engine room relay block starter relay terminal 2 or A50-48 (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 P, 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 - Step 3 .

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 P, 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 P, 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 - Step 1 .

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 P, 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 Techstream and vehicle starts.

2. Turn the engine switch on (IG).
3. Read the Data List according to the displays on the Techstream.
   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