Power Source Mode does not Change to ON (READY): Procedure

1. Move the shift lever to P.
2. Open and close the driver door when the power switch is OFF.
3. Check that pressing the power switch causes the power source mode to change to ON (READY).
   RESULT
   
   

   Result	Proceed to
   Power switch not ON (READY)	A
   Power switch ON (READY)	B

   HINT: 

   After the battery runs out, the hybrid control system may not turn ON (READY) if the steering lock ECU has not been initialized (lock / unlock may not be recorded) through the procedure described above.

B → END (SYSTEM OK) 

A: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Check whether the trouble recurs 5 seconds after the power switch is turned ON (IG).
3. Check whether DTCs for the main body ECU, certification ECU or hybrid vehicle control ECU are output.
   RESULT
   
   

   Display (DTC output) System name	Proceed to
   No DTC output	A
   Main body ECU SMART ACCESS SYSTEM WITH PUSH-BUTTON START	B
   Certification ECU STEERING LOCK SYSTEM	C
   Certification ECU ENGINE IMMOBILISER SYSTEM	D
   Hybrid vehicle control ECU HYBRID CONTROL SYSTEM	E

B → See step   25 

C → See step   26 

D → See step   27 

E → See step   28 

A: Go to next step 

1. Ensure the key is inside the cabin.
2. With the brake pedal released, check that the power source mode changes as shown below each time the power switch is pushed.

   OK

   OFF → ON (ACC) → ON (IG) → OFF

NG → See step   29 

OK: Go to next step 

1. Use the Data List to check if the steering lock condition is functioning properly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Steering Unlock Switch	Steering lock condition/ON or OFF	ON: Steering is unlocked OFF: Steering is locked	-

   OK

   ON (steering is unlocked) and OFF (steering is locked) are displayed on the Techstream screen.

NG → See step   24 

OK: Go to next step 

1. Use the Data List to check if the stop light switch is functioning properly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Stop Light SW	Stop Light switch/ON or OFF	ON: Brake pedal is depressed OFF: Brake pedal is released	-

   OK

   ON (brake pedal is depressed) and OFF (brake pedal is released) are displayed on the Techstream screen.

NG → See step   13 

OK: Go to next step 

1. Use the Data List to check if the shift position is functioning properly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Shift P Signal	Shift P position signal/ON or OFF	ON: Shift lever in P OFF: Shift lever not in P	-

   OK

   ON (shift lever in P) and OFF (shift lever not in P) are displayed on the Techstream screen.

NG → See step   16 

OK: Go to next step 

Fig 1: Identifying A68 Main Body ECU And A76 Hybrid Vehicle Control ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A68 main body ECU connector.
2. Disconnect the A76 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
   A68-4 (STSW) - A76-28 (ST2)	Always	Below 1 Ω
   A68-4 (STSW) or A76- 28 (ST2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 2: Identifying A68 Main Body ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   HINT: 

   The voltage is generated at terminal STSW for 0.3 seconds when the power switch is turned ON (READY).

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A68-4 (STSW) - Body ground	Brake pedal depressed with shift lever in P, power switch pushed once	11 to 14 V

NG → REPLACE MAIN BODY ECU 

OK: Go to next step 

1. Use the Data List to check if the L code certification result is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	L code certification result/NG or OK	OK: L code certification result is normal NG: L code certification result is abnormal	-

   OK

   OK is displayed on the Techstream screen.

NG → See step   18 

OK: Go to next step 

1. Use the Data List to check if the S code certification result is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	S code certification result/NG or OK	OK: S code certification result is normal NG: S code certification result is abnormal	-

   OK

   OK is displayed on the Techstream screen.

NG → See step   21 

OK: Go to next step 

1. Use the Data List to check if the hybrid control system start request signal is functioning properly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Ready Signal	Hybrid control system start request signal monitor/ON, OFF or Unknown	ON: System is ON (READY) OFF: System is OFF Unknown: System is Unknown	-

   OK

   ON (system is ON (READY)) and OFF (system is OFF) are displayed on the Techstream screen.

NG → See step   22 

OK: Go to next step 

1. Replace the ID code box. Refer to REMOVAL .
2. Check that pressing the power switch causes the power source mode to change to ON (READY).

   OK

   Power switch changes to ON (READY).

NG → See step   30 

OK → END (SYSTEM OK) 

1. Remove the STOP fuse from the main body ECU.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   STOP fuse	Always	Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

Fig 3: Identifying Stop Light Switch Operation & Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A35 stop light switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Stop light switch pin not pushed	Below 1 Ω
   3 - 4	Stop light switch pin pushed	Below 1 Ω
   1 - 2	Stop light switch pin pushed	10 kΩ or higher
   3 - 4	Stop light switch pin not pushed	10 kΩ or higher

NG → See step   23 

OK: Go to next step 

Fig 4: Identifying DH Main Body ECU & A35 Stop Light Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the DH main body ECU connector.
2. Disconnect the A35 stop light switch connector.
3. Measure the voltage and resistance according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A35-2 - Body ground	Always	11 to 14 V

   Standard resistance

   Tester Connection	Condition	Specified Condition
   DH-15 (STP) - A35-1	Always	Below 1 Ω
   DH-15 (STP) or A35-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU 

Fig 5: Identifying Shift Lock Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L47 shift lock control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   11 (P2) - 3 (E)	Shift lever not in P	Below 1 Ω
   11 (P2) - 3 (E)	Shift lever in P	10 kΩ or higher

NG → See step   33 

OK: Go to next step 

Fig 6: Identifying Main Body ECU And Shift Control ECU Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A68 main body ECU connector.
2. Disconnect the L47 shift lock control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A68-2 (P) - L47-11 (P2)	Always	Below 1 Ω
   L47-3 (E) - Body ground	Always	Below 1 Ω
   A68-2 (P) or L47-11 (P2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU 

1. Reregister the recognition codes in ECUs. Refer to REGISTRATION .

NEXT: Go to next step 

1. Use the Data List to check if the L code certification result is functioning properly again.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	L code certification result/NG or OK	OK: L code certification result is normal NG: L code certification result is abnormal	-

   OK

   OK is displayed on the Techstream screen.

NG → See step   20 

OK → END (SYSTEM OK) 

1. Replace the steering lock actuator assembly (steering lock ECU). Refer to DISASSEMBLY - Step 1 .
2. Check that pressing the power switch causes the power source mode to change to ON (READY).

   OK

   Power switch ON (READY).

NG → See step   31 

OK → END (SYSTEM OK) 

1. When another electrical key control transmitter is used, use the Data List to check again if the S code certification result is functioning properly.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	S code certification result/NG or OK	OK: S code certification result is normal NG: S code certification result is abnormal	-

   OK

   OK is displayed on the Techstream screen.

NG → See step   22 

OK → END (DOOR CONTROL TRANSMITTER IS DEFECTIVE) 

1. Replace the certification ECU. Refer to REMOVAL .
2. Check that pressing the power switch causes the power source mode to change to ON (READY).

   OK

   Power switch ON (READY).

NG → See step   32 

OK → END (SYSTEM OK)