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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 

OK: Go to next step 

1. Reconnect the F52 connector to the power management control ECU.
2. Turn the power switch off.
3. Connect the Techstream to the DLC3.
4. Turn the Techstream on.
5. Turn on and off any of the door courtesy light switches repeatedly at 1.5-second intervals or less until communication between the Techstream and vehicle starts.
6. Enter the following menus: Body Electrical/Power Source Control/Data List.
7. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Key Certification Waiting Timed Out	Key certification error detection/No or Yes	No: Key certification error not detected Yes: Key certification error detected	-

   OK

   When more than 1 second elapses after the power switch is turned from off to on (IG), No is displayed in the Data List.

NG → See step   9 

OK: Go to next step 

1. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

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

   OK

   ON (power switch is pushed) and OFF (power switch is not pushed) appear on the screen.

NG → See step   7 

OK: Go to next step 

1. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

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

2. Measure the voltage while checking the Data List on the Techstream.
   Fig 1: Identifying F51 And F52 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F52-20 (IG1D) - Body ground	Power switch off	Below 1 V
   F52-20 (IG1D) - Body ground	Power switch on (ACC)	Below 1 V
   F52-20 (IG1D) - Body ground	Power switch on (IG)	Output voltage at terminal AM21 or AM22 is -2 V or more
   F51-8 (IG2D) - Body ground	Power switch off	Below 1 V
   F51-8 (IG2D) - Body ground	Power switch on (ACC)	Below 1 V
   F51-8 (IG2D) - Body ground	Power switch on (IG)	Output voltage at terminal AM21 or AM22 is -2 V or more
   F52-19 (ACCD) - Body ground	Power switch off	Below 1 V
   F52-19 (ACCD) - Body ground	Power switch on (IG)	Output voltage at terminal AM21 or AM22 is -2 V or more
   F52-19 (ACCD) - Body ground	Power switch on (ACC)	Output voltage at terminal AM21 or AM22 is -2 V or more

   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (Power Management Control ECU)

NG → See step   10 

OK: Go to next step 

1. Check that the power source mode becomes on (ACC) and on (IG) when the power switch is operated.

   OK

   Power source mode becomes on (ACC) and on (IG) when the power switch is operated.

NG → CHECK RELAY CONTACT SIDE CIRCUIT 

OK → See step   13 

1. Remove the power switch. Refer to REMOVAL .
   Fig 2: Identifying Power Switch

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F2-7 (SS1) - F2-5 (GND)	Pushed	Below 1 Ω
   F2-7 (SS1) - F2-5 (GND)	Not pushed	10 kΩ or higher
   F2-2 (SS2) - F2-5 (GND)	Pushed	Below 1 Ω
   F2-2 (SS2) - F2-5 (GND)	Not pushed	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Power Switch)

NG → See step   11 

OK: Go to next step 

1. Disconnect the F52 connector from the power management control ECU.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F52-17 (SSW2) - F2-2 (SS2)	Always	Below 1 Ω
   F52-18 (SSW1) - F2-7 (SS1)	Always	Below 1 Ω
   F52-17 (SSW2) - Body ground	Always	10 kΩ or higher
   F52-18 (SSW1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SWITCH - POWER MANAGEMENT CONTROL ECU OR BODY GROUND) 

OK → See step   12 

1. Enter the following menus: Body Electrical/Power Source Control and Smart Access/DTC.
2. Check for DTCs.

   Result

   Result	Proceed to
   The following DTCs are not output: B2785 B2287 B2784	A
   DTC B2785 is not output but DTC B2287 is output.	B
   DTCs other than B2287 are output.	C

A → See step   14 

B → See step   15 

C → GO TO DIAGNOSTIC TROUBLE CODE TABLE