Power Source Mode does not Change to ON (READY) [10/2015 - ]: 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 power 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. "Yes" is displayed for the Data List item "Key Low Battery" 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 [10/2015 - ] 

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

   Power source mode changes to on (READY).

   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 power 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) [10/2015 - 03/2018]  , or refer to  Power Source Mode does not Change to ON (IG and ACC) [03/2018 - ]  

Result: 

C 

GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC). Refer to  Power Source Mode does not Change to ON (ACC) [10/2015 - ]  

Result: 

D 

GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG). Refer to  Power Source Mode does not Change to ON (IG) [10/2015 - ]  

Result: 

A 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the power 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
   Shift P Signal	Shift position P	OFF or ON	OFF: Shift lever not in P ON: Shift lever in P	Use this item to determine whether the shift lever position switch (P) is malfunctioning.

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Shift P Signal

   OK

   The Techstream display changes correctly in response to the shift lever operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

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 

   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 [10/2015 - 08/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ] 

Result: 

A 

See step  7

1. Connect the Techstream to the DLC3.
2. Turn the power 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 if the stop light switch assembly is malfunctioning. The hybrid control system cannot be started when this item is OFF. If the stop light switch assembly is malfunctioning, the hybrid control system can be started by pressing and holding the power 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 pedal operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  14

Result: 

OK 

See step  8

1. Connect the Techstream to the DLC3.
2. Turn the power 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	Hybrid control system start request signal status	OFF or ON	OFF: The power switch is not pressed ON: With the shift lever in P and the brake pedal depressed, the power switch is pressed and held	When the hybrid control system cannot be started due to a start request signal malfunction, OFF is displayed. When the power switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the power 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 display is displayed on the multi-information display in the combination meter assembly, and then press the power switch.

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  12

Result: 

OK 

See step  9

1. Disconnect the J41 certification ECU (smart key ECU assembly) connector.
2. Disconnect the J2 hybrid vehicle control ECU assembly connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J41-27 (ST2) - J2-9 (ST2)	Always	Below 1 Ω
   J41-27 (ST2) or J2-9 (ST2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  10

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J41-27 (ST2) - Body ground	Power switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after power switch released (starter off)	8.5 V or higher → 1.0 V or less

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [10/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

1. Inspect the transmitter battery.

   Refer to INSPECTION [10/2015 - ]

   NOTE:

   Do not wrap the lead wire ground 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 [10/2015 - ] 

1. Check that the steering unlocks when the power 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  Unable to Unlock Steering Wheel (Hybrid Control System cannot Start) [10/2015 - ] 

Result: 

OK 

See step  13

1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.
2. Move the shift lever to P.
3. Press the power 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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [10/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

GO TO IMMOBILISER SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to  PROBLEM SYMPTOMS TABLE [10/2015 - ] 

1. Disconnect the A55 stop light switch assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A55-1 (B) - Body ground	Power switch off	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A55-3 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  15

1. Disconnect the R1 certification ECU (smart key ECU assembly) connector.
2. Disconnect the A39 hybrid vehicle control ECU assembly connector.
3. Disconnect the A62 skid control ECU (brake actuator assembly) connector.
4. Disconnect the J22 transmission floor shift assembly connector.
5. Disconnect the 1D semiconductor pwr integration ECU connector.
6. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R1-25 (STP1) - A55-2 (L)	Always	Below 1 Ω
   R1-25 (STP1) or A55-2 (L) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  16

1. Inspect the stop light switch assembly.

   Refer to ON-VEHICLE INSPECTION [10/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [10/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to  REMOVAL [10/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019]  , or refer to  REMOVAL [08/2019 - ]