Power Source Mode does not Change to ON (IG and ACC) [08/2014 - ]: Procedure

1. Check the wireless door lock function by operating the electrical key transmitter sub-assembly.

   OK

   Wireless door lock function operates.

NG → See step   18 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the battery from the electrical key transmitter sub-assembly. Refer to REPLACEMENT [08/2014 - ] .
2. With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   The power source mode changes.

   HINT: 

   If the power source mode changes, the cabin verification is malfunctioning.

   Result

   Result	Proceed to
   The power source mode does not change.	A
   The power source mode changes.	B

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Switch
   *2	Electrical Key Transmitter Sub-assembly

B → See step   8 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the Techstream on.
3. Enter the following menus: Body Electrical / Power Source Control / Data List.
4. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Specified Condition
   Stop Light Switch1	State of brake pedal/ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

   OK

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

NG → See step   11 

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 state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON	ALL OFF: Engine switch off ACC ON: Engine switch on (ACC) (ACC relay on) IG1 ON: Engine switch on (IG) (IG1 relay on) IG2 ON: Engine switch on (IG) (IG2 relay on) ST ON: Sending engine start request signal	Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time).

2. With the engine switch off and brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch for 2 seconds or more and read the Data List.

   OK

   IG2 ON is displayed on the Techstream screen.

   HINT: 

   If the smart access system with push-button start (for Start Function) function has been canceled on the customization menu, ACC ON is displayed on the Techstream screen.

NG → See step   14 

OK: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

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

   -

   -

2. 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 state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON	All OFF: Engine switch off (ACC and IG) ACC ON: Engine switch on (ACC) IG1 ON: Engine switch on (IG) (IG1 relay on) IG2 ON: Engine switch on (IG) (IG2 relay on) ST ON: Sending engine start request signal	Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time).

3. Measure the voltage while reading the Data List on the Techstream.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H56-6 (IG1D) - Body ground	Engine switch off	1 V or less
   	Engine switch on (ACC)	1 V or less
   	Engine switch on (IG)	9 V or higher
   A36-9 (IG2D) - Body ground	Engine switch off	1 V or less
   	Engine switch on (ACC)	1 V or less
   	Engine switch on (IG)	9 V or higher
   H56-4 (ACCD) - Body ground	Engine switch off	1 V or less
   	Engine switch on (IG)	8.5 V or higher
   	Engine switch on (ACC)	8.5 V or higher

NG → See step   15 

OK → CHECK RELAY CONTACT SIDE CIRCUIT 

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	Engine switch 1 status/ON or OFF	ON: Engine switch pressed OFF: Engine switch not pressed	If the engine switch is pressed for a short time, the display may not change. Use this item to determine whether the engine switch input signal is malfunctioning.
   Start Switch2	Engine switch 2 status/ON or OFF	ON: Engine switch pressed OFF: Engine switch not pressed	Backup for engine switch 1. However, when the engine switch is pressed and held, the control functions only when both engine switch 1 and 2 are normal. Behaves the same way as engine switch 1.

   OK

   The Techstream display changes correctly in response to the engine switch operation.

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   19 

A: Go to next step 

1. Inspect the engine switch. Refer to INSPECTION [08/2014 - ] .

NG → See step   16 

OK: Go to next step 

1. Disconnect the H56 certification ECU (smart key ECU assembly) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H56-28 (SSW1) - H44-5 (SS1)	Always	Below 1 Ω
   H56-30 (SSW2) - H44-1 (SS2)	Always	Below 1 Ω
   H56-28 (SSW1) or H44-5 (SS1) - Body ground	Always	10 kΩ or higher
   H56-30 (SSW2) or H44-1 (SS2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   15 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   20 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   15 

1. Check for DTCs. Refer to DTC CHECK / CLEAR [08/2014 - ] .

   Result

   Result	Proceed to
   The following DTCs are not output: B2784 B287A	A
   DTC B2784 is output.	B
   DTC B278A is output.	C

B → See step   17 

C → See step   21 

A → REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY