Engine does not Start: Procedure

1. Place the key on the seat. Move the shift lever to P and depress the brake pedal.
2. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.
3. Open and close the driver side door with the engine switch off.
4. 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 → See step   27 

1. Read the value using the Techstream (Power Supply Open).
   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 Key / Data List.
   5. According to the display on the Techstream, read the Data List.
      SMART KEY
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Power Supply Open	Power supply open / OK or NG (Past)	OK: Power supply normal NG (Past): Power supply open occurred in past	-

2. Check for DTCs.
   1. Enter the following menus: Body Electrical / (desired system) / Trouble Codes.
   2. Read the DTCs.
      RESULT
      
      

      Result	Proceed to
      No DTC is output, power supply open has not occurred in past	A
      DTCs other than B2782 are output	B
      Power supply open has occurred in past and/or DTC B2782 is output	C

B → See step   26 

C → See step   28 

A: 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, push the engine switch and 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) or on (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   29 

C → See step   30 

D → See step   31 

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.

      OK

      Engine cranks.

NG → See step   5 

OK → See step   22 

1. Disconnect the B42 park/neutral position switch connector.
   Fig 1: Identifying B42 Park/Neutral Position Switch 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
   4 (B) - 5 (L)	Shift lever in P or N	Below 1 Ω
   	Shift lever not in P or N	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   19 

OK: Go to next step 

1. Remove the ST relay from the engine room relay block.
   Fig 2: Identifying DRL No. 2 Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according 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
   	Battery voltage applied to terminals 1 and 2	Below 1 Ω

NG → See step   19 

OK: Go to next step 

1. Disconnect the F81 power management control ECU connector.
   Fig 3: Identifying F81 Power Management Control ECU Connector

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F81-3 (STAR) - Body ground	20°C (68°F)	93.8 to 136.3 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Management Control ECU)

NG → See step   19 

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 / Power Source Control / Data List.
5. According to the display on the Techstream, read the Data List.
   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) or OFF (brake pedal released) appears on the screen according to the condition of the brake pedal.

NG → See step   15 

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 / Power Source Control / Data List.
5. According to the display on the Techstream, read the Data List.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Steering Unlock Switch	Steering unlock switch / ON or OFF	ON: Steering lock released OFF: Steering lock locked	-

   OK

   ON (steering lock released) or OFF (steering lock locked) appears on the screen according to the steering lock condition.

NG → See step   17 

OK: Go to next step 

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

   OK

   Lock moves to released position.

NG → See step   32 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the Techstream on.

   HINT: 

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

3. Enter the following menus: Body Electrical / Smart Key / Data List.
4. According to the display on the Techstream, read the Data List.
5. Turn the engine switch on (IG).
   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 appears on the screen.

NG → See step   34 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the Techstream on.

   HINT: 

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

3. Enter the following menus: Body Electrical / Smart Key / Data List.
4. According to the display on the Techstream, read the Data List.
5. Turn the engine switch on (IG).
   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 (L code certification result normal) appears on the screen.

NG → See step   33 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the Techstream on.

   HINT: 

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

3. Enter the following menus: Body Electrical / Smart Key / Data List.
4. According to the display on the Techstream, read the Data List.
5. Turn the engine switch on (IG).
   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   33 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the Techstream on.

   HINT: 

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

3. Enter the following menus: Body Electrical / Power Source Control / Data List.
4. According to the display on the Techstream, read the Data List.
5. Turn the engine switch on (IG).
   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 on OFF: ST relay off	The engine switch is pressed and held with the shift lever in P or N.

   NOTE:

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

   OK

   The Data List item changes from OFF to ON when the engine switch is pushed.

NG → See step   25 

OK → See step   22 

1. Inspect the stop light switch assembly. Refer to INSPECTION - Step 1 .

NG → See step   23 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   25 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   24 

OK → See step   25 

1. Replace the ST relay, park/neutral position switch assembly with a new or normally functioning part, or repair or replace any damaged wire harness or connector.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the Techstream on.

   HINT: 

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

3. Enter the following menus: Body Electrical / Power Source Control / Data List.
4. According to the display on the Techstream, read the Data List.
5. Turn the engine switch on (IG).
   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 on OFF: ST relay off	The engine switch is pressed and held with the shift lever in P or N.

   NOTE:

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

   OK

   The Data List item changes from OFF to ON when the engine switch is pushed.

NG → See step   25 

OK: Go to next step 

1. Place the key on the seat. Move the shift lever to P and depress the brake pedal.
2. Check that the engine switch indicator is illuminated in green, push the engine switch and check that the engine starts.
3. Open and close the driver side door with the engine switch off.
4. Check if the engine can be started.

   OK

   Engine can be started.

NG → See step   35 

OK → END