Power Source Mode does not Change to ON (READY) [07/2020 - 12/2021]: Procedure

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 → ACC → ON → off	A
   Power source mode does not change to ACC or ON	B
   Power source mode changes to ON but not to ACC	C
   Power source mode changes to ACC but not to ON	D

Result: 

B 

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG and ACC)). Refer to  Power Source Mode does not Change to ON (IG and ACC) [07/2020 - ] 

Result: 

C 

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (ACC)). Refer to  Power Source Mode does not Change to ON (ACC) [07/2020 - ] 

Result: 

D 

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG)). Refer to  Power Source Mode does not Change to ON (IG) [07/2020 - ] 

Result: 

A 

See step  2

1. Read the Data List according to the display on the GTS.

   Body Electrical > Power Source Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Stop Light Switch	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 Switch

   OK

   The GTS display changes correctly in response to the brake pedal operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  7

Result: 

OK 

See step  3

1. Read the Data List according to the display on the GTS.

   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 if the shift position switch is malfunctioning. The hybrid control system cannot be started when this item is OFF.

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Shift P Signal

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  10

Result: 

OK 

See step  4

1. Read the Data List according to the display on the GTS.

   Body Electrical > Power Source Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Power Supply Condition	Power supply state	OFF, ACC ON, IGR ON, IGP ON or Starter ON	OFF: Ignition switch off ACC ON: Ignition switch ACC IGR ON: Ignition switch ON IGP ON: Ignition switch ON Starter ON: Sending hybrid control system start request signal	-

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Power Supply Condition

   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 GTS display changes correctly in response to the power switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  11

Result: 

OK 

See step  5

1. Disconnect the A15 certification ECU (smart key ECU assembly) connector.
2. Disconnect the A33 hybrid vehicle control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A15-2 (ST2) - A33-4 (ST2)	Always	Below 1 Ω
   A15-2 (ST2) or A33-4 (ST2) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Connect the A15 certification ECU (smart key ECU assembly) connector.
2. Connect the A33 hybrid vehicle control ECU connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A15-2 (ST2) - Body ground	With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released	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. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ] 

1. Disconnect the A43 stop light switch assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A43-7 (B) - Body ground	Ignition switch off	11 to 14 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A43-2 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

1. Disconnect the A15 certification ECU (smart key ECU assembly) connector.
2. Disconnect the A32 hybrid vehicle control ECU connector.
3. Disconnect the A85 No. 2 skid control ECU (brake actuator assembly) connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A15-21 (STP1) - A43-3 (L)	Always	Below 1 Ω
   A15-21 (STP1) or A43-3 (L) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Check the stop light switch assembly.

   Refer to ON-VEHICLE INSPECTION [07/2020 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ] 

Result: 

NG 

REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to  REMOVAL [07/2020 - ] 

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E52-14 (P) - Body ground	Shift lever in P → Shift lever not in P	9 V or higher → 2.76 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 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ] 

Result: 

NG 

See step  13

1. Check that the steering unlocks when the ignition switch is turned to ACC.

   OK

   The steering unlocks.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO OTHER PROBLEM (Unable to Unlock Steering Wheel (Hybrid Control System cannot Start)). Refer to  Unable to Unlock Steering Wheel (Hybrid Control System cannot Start) [07/2020 - ]  

Result: 

OK 

See step  12

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 ACC.

   OK

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

   HINT: 

   The immobilizer 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 ACC.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ] 

Result: 

NG 

GO TO OTHER PROBLEM (Immobilizer System does not Operate Properly). Refer to  Immobilizer System does not Operate Properly [07/2020 - ]  

1. Disconnect the E52 certification ECU (smart key ECU assembly) connector.
2. Disconnect the E25 shift lock control unit assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E52-14 (P) - E25-3 (P2)	Always	Below 1 Ω
   E52-14 (P) or E25-3 (P2) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  14

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E52-14 (P) - Body ground	Shift lever in P	9 V or higher

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY. Refer to  DISASSEMBLY [07/2020 - ] 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [07/2020 - ]