Engine does not Start [11/2017 - 10/2022]: Procedure

1. Press a switch of the electrical key transmitter sub-assembly.

   OK

   The electrical key transmitter sub-assembly LED illuminates.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  11

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. Read the Data List according to the display on the Techstream.

   Body Electrical > Smart Access > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Key Low Battery	Transmitter battery depleted	No or Yes	No: Transmitter battery not depleted Yes: Transmitter battery depleted	The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).

   Body Electrical > Smart Access > Data List 

   Tester Display
   Key Low Battery

   Result

   Result	Proceed to
   "No" is displayed on the Techstream screen	A
   "Yes" is displayed on the Techstream screen	B

Result: 

B 

REPLACE TRANSMITTER BATTERY. Refer to  REPLACEMENT [09/2014 - ] 

Result: 

A 

See step  3

1. If the problem occurs in certain locations or times of day, the possibility of wave interference is high.

   HINT: 

   Whether the problem is due to wave interference can be checked by holding the electrical key transmitter sub-assembly near the door control receiver.

   OK

   Engine starts.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

AFFECTED BY WAVE INTERFERENCE 

Result: 

NG 

See step  4

1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.
2. Move the shift lever to P.
3. With the brake pedal released, check that pressing the engine switch causes the power source mode to change.

   Result

   Result	Proceed to
   Power source mode changes: Off → on (ACC) → on (IG) → off	A
   Power source mode does not change to on (ACC) or on (IG)	B
   Power source mode changes to on (IG) but not to on (ACC)	C
   Power source mode changes to on (ACC) but not 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) [11/2017 - ]  

Result: 

C 

GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC). Refer to  Power Source Mode does not Change to ON (ACC) [09/2014 - ]  

Result: 

D 

GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG). Refer to  Power Source Mode does not Change to ON (IG) [09/2014 - ]  

Result: 

A 

See step  5

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. Read the Data List according to the display on the Techstream.

   Body Electrical > Power Source Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Neutral SW/ Clutch SW	Shift position (P and N)	OFF or ON	OFF: Shift lever in any position other than P or N ON: Shift lever in P or N	Use this item to determine whether the park/neutral position switch assembly is malfunctioning. When the engine cannot be started due to a park/neutral position switch assembly malfunction, OFF is displayed.

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Neutral SW/ Clutch SW

   Body Electrical > Starting Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Shift Position P or N	Park/Neutral position switch status	OFF or ON	OFF: Shift lever not in P ON: Shift lever in P	When malfunctioning, the engine will not crank.

   Body Electrical > Starting Control > Data List 

   Tester Display
   Shift Position P or N

   OK

   The Techstream display changes correctly in response to the shift position.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  23

Result: 

OK 

See step  6

1. Using the Techstream, check for certification ECU (smart key ECU assembly) DTCs.

   Body Electrical > Smart Access > Trouble Codes 

   Body Electrical > Power Source Control > Trouble Codes 

   Body Electrical > Starting Control > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   Smart access system with push-button start (for Start Function) DTCs are output	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2017 - 11/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2019 - 10/2022] 

Result: 

A 

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 / Power Source Control / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Power Source Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Stop Light Switch1	State of brake pedal	OFF or ON	OFF: Brake pedal released ON: Brake pedal depressed	Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. If the stop light switch is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Stop Light Switch1

   OK

   The Techstream display changes correctly in response to the brake operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  21

Result: 

OK 

See step  8

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. Read the Data List according to the display on the Techstream.

   Body Electrical > Power Source Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Starter Request Signal	Engine start request signal status	OFF or ON	OFF: After approx. 1 second has elapsed, the engine switch is released ON: With the shift lever in P and the brake pedal depressed, the engine switch is pressed and held	When the engine cannot be started due to a start request signal malfunction, OFF is displayed. When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine switch needs to be pressed and held for a certain period of time.

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Starter Request Signal

   NOTE:

   Check that the key indicator will be displayed on the multi-information display in the combination meter assembly, and then press the engine switch.

   OK

   The Techstream display changes correctly in response to the engine switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  12

Result: 

OK 

See step  9

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

   OK

   The steering unlocks.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING). Refer to  Steering Lock does not Lock [09/2014 - 10/2022] 

Result: 

OK 

See step  10

1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.
2. Move the shift lever to P.
3. Press the engine switch with the brake pedal released and check that the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).

   HINT: 

   The immobiliser function can be determined to be operating correctly if the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SMART KEY ECU ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

NG 

GO TO IMMOBILISER SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 10/2022] 

1. Inspect the transmitter battery.

   Refer to INSPECTION [09/2014 - ]

   NOTE:

   Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY 

Result: 

NG 

REPLACE TRANSMITTER BATTERY. Refer to  REPLACEMENT [09/2014 - ] 

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. Read the Data List according to the display on the Techstream.
6. Get into the vehicle while carrying the electrical key transmitter sub-assembly, move the shift lever to P, press the engine switch while depressing the brake pedal and confirm that the Techstream display changes.

   Body Electrical > Starting Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Starter SW	Starter operation request	OFF or ON	OFF: Starter operation not requested ON: Starter operation requested	When malfunctioning, the engine will not crank.

   Body Electrical > Starting Control > Data List 

   Tester Display
   Starter SW

   OK

   The Techstream display changes.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SMART KEY ECU ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

OK 

See step  13

1. Inspect the ST NO. 1 relay (starter relay assembly).

   for 2GR-FKS: Refer to ON-VEHICLE INSPECTION [11/2017 - ]

   for 8AR-FTS: Refer to ON-VEHICLE INSPECTION [10/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ST NO. 1 RELAY (STARTER RELAY ASSEMBLY) 

Result: 

OK 

See step  14

1. Disconnect the A13 certification ECU (smart key ECU assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))

2. Disconnect the A91*1 and F87*1 or A82*2 ECM connector.
   1. *1: for 2GR-FKS
   2. *2: for 8AR-FTS
3. Move the shift lever to P or N.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A13-10 (STAR) - Body ground	20°C (68°F)	107.05 to 116.33 Ω
   A13-12 (STA) - Body ground	20°C (68°F)	106.78 to 115.98 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  17

Result: 

OK 

See step  15

1. Remove the starter assembly.

   for 2GR-FKS: Refer to REMOVAL [11/2017 - ]

   for 8AR-FTS: Refer to REMOVAL [10/2015 - ]

2. Inspect the starter assembly.

   for 2GR-FKS: Refer to INSPECTION [11/2017 - ]

   for 8AR-FTS: Refer to INSPECTION [10/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE STARTER ASSEMBLY 

for 2GR-FKS: Refer to REMOVAL [11/2017 - ]

for 8AR-FTS: Refer to REMOVAL [10/2015 - ]

Result: 

OK 

See step  16

1. Disconnect the F18 and G3 starter assembly connectors.
2. Remove the ST NO. 1 relay (starter relay assembly) from the No. 2 engine room relay block and No. 2 junction block assembly.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G3-1(B) - Body ground	Always	11 to 14 V
   5 (ST NO. 1 relay (starter relay assembly)) - 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 (ST NO. 1 relay (starter relay assembly)) - F18-1 (ST)	Always	Below 1 Ω
   3 (ST NO. 1 relay (starter relay assembly)) or F18-1 (ST) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 10/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 11/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2019 - 09/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2020 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A13 certification ECU (smart key ECU assembly) connector.
2. Disconnect the F57*1 or F76*2 park/neutral position switch assembly connector.
   1. *1: for 2GR-FKS
   2. *2: for 8AR-FSE
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR 2GR-FKS
   
   

   Tester Connection	Condition	Specified Condition
   A13-10 (STAR) - F57-4 (B)	Always	Below 1 Ω
   A13-10 (STAR) or F57-4 (B) - Body ground	Always	10 kΩ or higher

   FOR 8AR-FTS
   
   

   Tester Connection	Condition	Specified Condition
   A13-10 (STAR) - F76-4 (B)	Always	Below 1 Ω
   A13-10 (STAR) or F76-4 (B) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  18

1. Disconnect the F57*1 or F76*2 park/neutral position switch assembly.
   1. *1: for 2GR-FKS
   2. *2: for 8AR-FTS
2. Remove the ST NO. 1 relay (starter relay assembly) from the No. 2 engine room relay block and No. 2 junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR 2GR-FKS
   
   

   Tester Connection	Condition	Specified Condition
   F57-5 (L) - 2 (ST NO. 1 relay (starter relay assembly))	Always	Below 1 Ω
   F57-5 (L) or 2 (ST NO. 1 relay (starter relay assembly)) - Body ground	Always	10 kΩ or higher

   FOR 8AR-FTS
   
   

   Tester Connection	Condition	Specified Condition
   F76-5 (L) - 2 (ST NO. 1 relay (starter relay assembly))	Always	Below 1 Ω
   F76-5 (L) or 2 (ST NO. 1 relay (starter relay assembly)) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  19

1. Disconnect the A13 certification ECU (smart key ECU assembly) connector.
2. Remove the ST NO. 1 relay (starter relay assembly) from the No. 2 engine room relay block and No. 2 junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A13-12 (STA) - 2 (ST NO. 1 relay (starter relay assembly))	Always	Below 1 Ω
   A13-12 (STA) or 2 (ST NO. 1 relay (starter relay assembly)) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  20

1. Remove the ST NO. 2 relay (starter relay assembly) from the No. 2 engine room relay block and No. 1 junction block assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (ST NO. 1 relay (starter relay assembly)) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 10/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 11/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2019 - 09/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2020 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A13 certification ECU (smart key ECU assembly) connector.
2. Disconnect the A52 stop light switch assembly connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A52-1 (B) - Body ground	Always	11 to 14 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Stop Light Switch Assembly)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A13-2 (STP1) - A52-2 (L)	Always	Below 1 Ω
   A13-2 (STP1) or A52-2 (L) - Body ground	Always	10 kΩ or higher
   A52-3 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  22

1. Inspect the stop light switch assembly.

   Refer to ON-VEHICLE INSPECTION [09/2014 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SMART KEY ECU ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

NG 

REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

1. Remove the park/neutral position switch assembly.

   for A760H: Refer to REMOVAL [09/2014 - ]

   for AA81E: Refer to REMOVAL [09/2014 - ]

2. Inspect the park/neutral position switch assembly.

   for A760H: Refer to INSPECTION [09/2014 - ]

   for AA81E: Refer to INSPECTION [09/2014 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

for A760H: Refer to REMOVAL [09/2014 - ]

for AA81E: Refer to REMOVAL [09/2014 - ]

Result: 

OK 

See step  24

1. Disconnect the A13 certification ECU (smart key ECU assembly) connector.
2. Disconnect the F57*1 or F76*2 park/neutral position switch assembly connector.
   1. *1: for 2GR-FKS
   2. *2: for 8AR-FTS
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR 2GR-FKS
   
   

   Tester Connection	Condition	Specified Condition
   A13-10 (STAR) - F57-4 (B)	Always	Below 1 Ω
   A13-10 (STAR) or F57-4 (B) - Body ground	Always	10 kΩ or higher

   FOR 8AR-FTS
   
   

   Tester Connection	Condition	Specified Condition
   A13-10 (STAR) - F76-4 (B)	Always	Below 1 Ω
   A13-10 (STAR) or F76-4 (B) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SMART KEY ECU ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR