Power Source Mode does not Change to ON (READY) [02/2019 - 06/2020]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical or Powertrain / Immobiliser or Hybrid Control / Trouble Codes.
5. Check for DTCs.

   Body Electrical > Immobiliser > Trouble Codes 

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [02/2019 - ] 

Result: 

A 

See step  2

1. Enter the following menus: Powertrain / Hybrid Control / Data List.
2. Read the Data List according to the display on the Techstream.

   Powertrain > Hybrid Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Permit Start by Immobiliser	Status of the permit start by "Immobiliser System"	No Judgment, OK or NG	No Judgment: No judgment OK: Hybrid control system start permitted NG: Hybrid control system start not permitted	-

   Powertrain > Hybrid Control > Data List 

   Tester Display
   Permit Start by Immobiliser

   OK

   OK is displayed after the hybrid control system is started.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ] 

Result: 

NG 

See step  3

1. Check that the hybrid control system starts after the ignition switch was turned to ON.

   OK

   Hybrid control system starts normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

NG 

See step  4

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Transponder Key ECU Assembly)	*b	Approximately 160 ms.
   *c	Approximately 270 ms.	*d	Approximately 40 ms.
   *e	Approximately 60 ms.	*f	IMO Waveform
   *g	IMI Waveform	*h	Waveform A
   *i	Waveform B	*j	Waveform C
   *k	Waveform A (detail)	-	-

   NOTE:

   The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

   Measurement Condition

   Tester Connection	Condition	Tool Setting	Specified Condition
   A30-23 (IMO) - Body ground	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	2 V/DIV., 500 ms./DIV.	Pulse generation (See waveform B)
   A30-10 (IMI) - Body ground	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	2 V/DIV., 500 ms./DIV.	Pulse generation (See waveform A and C)

   Result

   Result	Proceed to
   Normal waveform	A
   Waveform A is not output, or has abnormal wavelength or shape	B
   Waveform B is not output, or has abnormal wavelength or shape	C
   Waveform C is not output, or has abnormal wavelength or shape	D

Result: 

B 

See step  7

Result: 

C 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [02/2019 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020] 

Result: 

D 

See step  8

Result: 

A 

See step  5

1. Register the communication ID between the transponder key ECU assembly and hybrid vehicle control ECU assembly.

   Refer to REGISTRATION [02/2019 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Check that the hybrid control system starts after the ignition switch was turned to ON.

   OK

   Hybrid control system starts normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (COMMUNICATION ID WAS NOT REGISTERED) 

Result: 

NG 

See step  8

1. Disconnect the G52 transponder key ECU assembly connector.
2. Disconnect the A30 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
   G52-10 (EFII) - A30-23 (IMO)	Always	Below 1 Ω
   G52-11 (EFIO) - A30-10 (IMI)	Always	Below 1 Ω
   G52-10 (EFII) or A30-23 (IMO) - Other terminals and body ground	Always	10 kΩ or higher
   G52-11 (EFIO) or A30-10 (IMI) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

See step  8

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Replace the transponder key ECU assembly with a new one.

   Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

1. Register the recognition codes to the ECUs.

   Refer to REGISTRATION [02/2019 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  10

1. Register the ECU communication ID codes.

   Refer to REGISTRATION [02/2019 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  11

1. Check that the hybrid control system starts.

   OK

   Hybrid control system starts normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]