Engine does not Start [08/2015 - 08/2019]: Procedure

1. Measure the battery voltage.

   Standard voltage

   11 to 14 V

   HINT: 

   A simple method to determine whether the battery is depleted is to operate the horn.

Result: 

NG 

GO TO CHARGING SYSTEM. Refer to the appropriate service information 

Result: 

OK 

See step  2

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. According to the display on the Techstream, read the Data List.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Power Supply Open	Record of malfunction of signal sent to steering lock actuator assembly (motor) from power management control ECU (open circuit) (DTC B2782 stored)/OK or NG(Past)	OK: No record of malfunction (open circuit) NG(Past): Record of malfunction (open circuit) exists	This item records malfunctions in the circuit between the power management control ECU and steering lock actuator assembly (motor).

6. Using the Techstream, confirm the output of DTCs for all systems.
   RESULT
   
   

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

Result: 

B 

GO TO DTC CHART 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )

Result: 

C 

GO TO STEERING LOCK SYSTEM (B2782) 

(Refer to DTC B2782: Power Source Control ECU Malfunction [08/2015 - 08/2019] )

Result: 

A 

See step  3

1. When the key is inside the vehicle and the shift lever is in P, push the engine with the brake pedal released switch and check that the power source mode changes.
   RESULT
   
   

   Result	Proceed to
   Power source mode changes as follows (normal): 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) but does change to on (ACC)	C
   Power source mode does not change to on (ACC) but does change to on (IG)	D

Result: 

B 

GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC) 

(Refer to Power Source Mode does not Change to ON (IG and ACC) [08/2015 - 08/2019] )

Result: 

C 

GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) 

(Refer to Power Source Mode does not Change to ON (IG) [08/2015 - 08/2019] )

Result: 

D 

GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC) 

(Refer to Power Source Mode does not Change to ON (ACC) [08/2015 - 08/2019] )

Result: 

A 

See step  4

1. Get into the vehicle while carrying the key.
2. Move the shift lever to P.
3. Depress the brake pedal.
4. Confirm that the engine switch indicator illuminates in green, and then press the engine switch and check that the engine cranks.
   RESULT
   
   

   Result	Proceed to
   Engine does not crank	A
   Engine cranks, but there is not initial combustion	B
   Engine cranks, but is difficult to start	C

Result: 

B 

GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE) 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )

Result: 

C 

GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE) 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )

Result: 

A 

See step  5

1. Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while not depressing the brake pedal and check that the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC).

   OK

   The security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC).

   HINT: 

   If the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC), the engine immobiliser function can be presumed to be normal.

Result: 

NG 

See step  12

Result: 

OK 

See step  6

1. Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while depressing the brake pedal and check that the engine switch indicator changes.

   OK

   The indicator illuminates in green.

   HINT: 

   If the engine switch indicator illuminates in green when the procedure above is performed, the P, N and brake signals can be considered to be normal.

Result: 

NG 

See step  17

Result: 

OK 

See step  7

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 / Starting Control / Data List.
5. Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while depressing the brake pedal and confirm that the Data List item changes.
   STARTING CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Starter SW	Power management control ECU starter activation request/ON or OFF	ON: Starter activation requested OFF: Starter activation not requested	When there is a malfunction, the engine cannot be cranked.

   OK

   The Data List item changes.

Result: 

NG 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

OK 

See step  8

1. Remove the ST relay from the engine room relay 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
   1 - 2	20°C (68°F)	93.8 to 136.4 Ω
   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

3. Reinstall the ST relay to the engine room relay block.

Result: 

NG 

REPLACE ST RELAY 

Result: 

OK 

See step  9

1. Disconnect the G38 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
   G38-3 (STAR) - Body ground	20°C (68°F)	93.8 to 136.4 Ω
   G38-2 (STA) - Body ground

   TEXT IN ILLUSTRATION
   
   

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  10

1. Inspect the starter assembly (Refer to INSPECTION [08/2015 - ] ).

Result: 

NG 

REPLACE STARTER ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  11

1. Remove the starter assembly from the vehicle to perform an inspection.
2. Remove the ST relay from the engine room relay block.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D2-1 - Body ground	Always	11 to 14 V
   5 - Body ground	Always	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - D3-1	Always	Below 1 Ω
   3 or D3-1 - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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. According to the display on the Techstream, read the Data List.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU and ID code box/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU or ID code box is not registered or the certification ECU or ID code box is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK (S code certification result normal) appears on the screen.

Result: 

NG 

See step  23

Result: 

OK 

See step  13

1. Check that the steering unlocks when the engine switch is turned on (ACC).

   OK

   The steering unlocks.

Result: 

NG 

See step  25

Result: 

OK 

See step  14

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. According to the display on the Techstream, read the Data List.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Immobiliser	State of immobiliser system determined by certification ECU/ Set or Unset	Set: Engine immobiliser set (engine switch off) Unset: Engine immobiliser unset (engine switch on [ACC] or on [IG])	When the immobiliser cannot be unset, this item can be used to determine whether the certification ECU or ID code box is part of the problem. The engine cannot be started when this item displays "Set". HINT:  The state of the immobiliser (whether it is set or unset) can be determined through the certification ECU. If this item displays "Set", the communication between the certification ECU and ID code box can be determined to be normal. The security indicator light operation is only linked with the state of the immobiliser (set/unset), and is not related to the steering lock operation (lock/unlock), when the immobiliser is set, the security indicator light blinks.

   OK

   The Data List item changes to "unset" when the engine switch is turned on (ACC) or on (IG).

Result: 

NG 

See step  29

Result: 

OK 

See step  15

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
   Starter Request Signal	Condition of engine start command signal/ON or OFF	ON: Engine switch pressed and held while carrying key with shift lever in P and brake pedal depressed OFF: Engine switch released after approximately 1 second elapses	This item displays "ON" when cranking the engine. The engine cannot be started when this item is "OFF".

   OK

   The display changes in response to the operation of the engine switch.

   NOTE:

   Make sure that the engine switch indicator is illuminated in green before pressing the engine switch.

Result: 

NG 

REPLACE CERTIFICATION ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

OK 

See step  16

1. Replace the ID code box with a new one (Refer to REMOVAL [08/2015 - ] ).
2. Perform the registration procedures (Refer to REGISTRATION [08/2015 - 08/2019] ).
3. Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while not depressing the brake pedal and check that the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC).

Result: 

NEXT 

END 

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 or Starting 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
   Shift P Signal	Shift position (P)/ON or OFF	ON: Shift lever in P OFF: Shift lever not in P	Use this item to determine if the shift position switch is malfunctioning. The engine cannot be started when this item is "OFF".
   Neutral SW/ Clutch SW	Shift position (P, N) (for Automatic Transmission) or state of clutch pedal (for Manual Transmission)/ON or OFF	ON: Shift lever in P or N (for Automatic Transmission) or clutch pedal depressed (for Manual Transmission) OFF: Shift lever not in P or N (for Automatic Transmission) or clutch pedal released (for Manual Transmission)	Use this item to help determine if the park/neutral position switch (for Automatic Transmission) or clutch switch (for Manual Transmission) is malfunctioning. The engine cannot be started when this item is "OFF".

   STARTING CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Shift Position P or N	Condition of park/neutral position switch/ON or OFF	ON: Shift lever in P or N OFF: Shift lever not in P or N	When there is a malfunction, the engine cannot be cranked.

   OK

   The item in the Data List changes according to the shift position.

Result: 

NG 

See step  19

Result: 

OK 

See step  18

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	State of brake pedal/ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   OK

   The item in the Data List changes when the brake pedal is depressed and released.

Result: 

OK 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

NG 

See step  21

1. Disconnect the C33 park/neutral position switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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)

Result: 

NG 

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  20

1. Disconnect the G38 power management control ECU connector.
2. Disconnect the C33 park/neutral position switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G38-3 (STAR) - C33-4 (B)	Always	Below 1 Ω
   G38-3 (STAR) - Body ground	Always	10 kΩ or higher

4. Reconnect the park/neutral position switch connector.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G38-3 (STAR) - Body ground	Engine switch pressed and held with brake pedal depressed (starter on) → Engine switch released after approximately 1 second elapses (starter off)	6 V or more* → 1.8 V or less

   HINT: 

   *: When the engine is cranking, the battery voltage may momentarily drop to approximately 6 V.

Result: 

OK 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Inspect the stop light switch assembly (Refer to ON-VEHICLE INSPECTION [08/2015 - ] ).

Result: 

NG 

REPLACE STOP LIGHT SWITCH ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  22

See step  4

Result: 

OK 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Replace the certification ECU with a new one (Refer to REMOVAL [08/2015 - 08/2019] ).
2. Perform the registration procedures (Refer to REGISTRATION [08/2015 - 08/2019] ).
3. Use the Data List to check if S code certification is functioning properly again.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU and ID code box/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU or ID code box is not registered or the certification ECU or ID code box is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK (S code certification result normal) appears on the screen.

Result: 

OK 

END 

Result: 

NG 

See step  24

1. Replace the ID code box with a new one (Refer to REMOVAL [08/2015 - ] ).
2. Perform the registration procedures (Refer to REGISTRATION [08/2015 - 08/2019] ).
3. Use the Data List to check if S code certification is functioning properly again.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU and ID code box/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU or ID code box is not registered or the certification ECU or ID code box is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

Result: 

NEXT 

END 

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	State of steering unlock sensor signal output from steering lock actuator assembly/ON or OFF	ON: Steering unlocked OFF: Steering locked	When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering is locked. When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks. The engine cannot be started when the steering unlock signal is off.

   OK

   The item in the Data List indicates "ON" (the steering is unlocked).

Result: 

OK 

GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING WHEEL) 

(Refer to Unable to Lock Steering Wheel [08/2015 - 08/2019] )

Result: 

NG 

See step  26

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. According to the display on the Techstream, read the Data List.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between ID code box and steering lock actuator assembly/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the ID code box or steering lock actuator assembly is not registered or the ID code box or steering lock actuator is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   The Data List item changes to "OK" when the key is inside the vehicle.

   HINT: 

   Reasons for verification failure:

   • The steering lock ECU or ID code box is malfunctioning.
   • There is a problem with the communication between ECUs.
   • An ECU is replaced, but is not registered.
   • An ECU is replaced with an ECU which has a code already stored in it.

Result: 

NG 

See step  28

Result: 

OK 

See step  27

1. Replace the steering lock actuator assembly (steering lock ECU) with a new one (Refer to DISASSEMBLY [08/2015 - 08/2019] ).
2. Perform the registration procedures (Refer to REGISTRATION [08/2015 - 08/2019] ).
3. Turn the engine switch on (IG).
4. Operate the steering wheel and check the steering condition.

Result: 

NEXT 

END 

1. Replace the steering lock actuator assembly (steering lock ECU) with a new one (Refer to DISASSEMBLY [08/2015 - 08/2019] ).
2. Perform the registration procedures (Refer to REGISTRATION [08/2015 - 08/2019] ).
3. Use the Data List to check if L code certification is functioning properly again.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between ID code box and steering lock actuator assembly/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the ID code box or steering lock actuator assembly is not registered or the ID code box or steering lock actuator is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK (L code certification result normal) appears on the screen.

Result: 

OK 

END 

Result: 

NG 

REPLACE ID CODE BOX 

(Refer to REMOVAL [08/2015 - ] )

1. Replace the certification ECU with a new one (Refer to REMOVAL [08/2015 - 08/2019] ).
2. Perform the registration procedures (Refer to REGISTRATION [08/2015 - 08/2019] ).
3. Use the Data List to check if S code certification is functioning properly again.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU and ID code box/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU or ID code box is not registered or the certification ECU or ID code box is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   OK (S code certification result normal) appears on the screen.

Result: 

OK 

END 

Result: 

NG 

See step  30

1. Replace the ID code box with a new one (Refer to REMOVAL [08/2015 - ] ).
2. Perform the registration procedures (Refer to REGISTRATION [08/2015 - 08/2019] ).
3. Use the Data List to check if S code certification is functioning properly again.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU and ID code box/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU or ID code box is not registered or the certification ECU or ID code box is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

Result: 

NEXT 

END