Power Source Mode does not Change to ON (IG and ACC): Procedure

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the Techstream on.

   HINT: 

   When using the Techstream with the engine switch off, turn any of the door courtesy light switches on and off repeatedly at intervals of 1.5 seconds or less until communication between the tester and vehicle starts.

3. Enter the following menus: Body Electrical / Power Source Control / Data List.
4. Read the Data List and check that "No" is displayed 1 second after turning the engine switch from off to on (IG).
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Key Certifi Wait T-Out	Key certification waiting timed out / Yes or No	Yes: Key certification waiting timed out No: Key certification completed within specified time	-

   OK

   "No" is displayed 1 second after turning the engine switch from off to on (IG).

NG → See step   9 

OK: Go to next step 

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. According to the display on the Techstream, read the Data List.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Start Switch1	Start Switch 1 / ON or OFF	ON: Engine switch pushed OFF: Engine switch not pushed	-
   Start Switch2	Start Switch 2 / ON or OFF	ON: Engine switch pushed OFF: Engine switch not pushed	-

   OK

   The display changes in response to the operation of the engine switch.

NG → See step   7 

OK: Go to next step 

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 and check that the display changes according to the changes in the power source mode when the engine switch is pushed.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Power Supply Condition	Power Supply Condition / IG2 ON, ST ON, All OFF, IG1 ON or ACC ON	IG2 ON: IG2 relay on ST ON: ST request signal on All OFF: All relays off IG1 ON: IG1 relay on ACC ON: ACC relay on	-

   OK

   Display changes according to the changes in the power source mode when the engine switch is pushed.

6. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying Power Management Control ECU Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a

   Component with harness connected (Power Management Control ECU)

   -

   -

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   F80-20 (IG1D) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (ACC)
   	Engine switch on (IG)	((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
   F81-8 (IG2D) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (ACC)
   	Engine switch on (IG)	((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
   F80-19 (ACCD) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (ACC)	((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
   	Engine switch on (IG)	((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher

NG → See step   10 

OK: Go to next step 

1. Check that the power source mode changes to on (ACC) and on (IG) when operating the engine switch.

   OK

   The power source mode changes to on (ACC) and on (IG) in response to the operation of the engine switch.

NG → CHECK RELAY CONTACT SIDE CIRCUIT 

OK → See step   11 

1. Remove the engine switch.
   Fig 2: Identifying Engine Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   7 (SS1) - 5 (GND)	Engine switch not pushed	10 kΩ or higher
   	Engine switch pushed	Below 1 Ω
   2 (SS2) - 5 (GND)	Engine switch not pushed	10 kΩ or higher
   	Engine switch pushed	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Engine Switch)

NG → See step   15 

OK: Go to next step 

1. Disconnect the F80 power management control ECU connector.
2. Disconnect the F71 engine switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F80-17 (SSW2) - F71-2 (SS2)	Always	Below 1 Ω
   F80-18 (SSW1) - F71-7 (SS1)
   F80-17 (SSW2) - Body ground	Always	10 kΩ or higher
   F80-18 (SSW1) - Body ground
   F71-5 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10 

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 / Trouble Codes.
5. Read the DTCs.
6. Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
7. Read the DTCs.
   RESULT
   
   

   Result	Proceed to
   None of the following DTCs are output: B2785 Communication Malfunction between ECUs Connected by LIN B2287 LIN Communication Master Malfunction B2784 Antenna Coil Open/Short	A
   DTC B2287 is output but B2785 is not output.	B
   A DTC other than B2287 is output.	C

B → See step   12 

C → See step   13 

A → See step   14