DTC P0A10-263: DC / DC Converter Status Circuit High Input: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   P0A10-263 only is output.	A
   P0A10-263 and other DTCs are output.	B

B → See step   7 

A: Go to next step 

1. Turn the power switch off.
2. Disconnect the No. 2 battery pack wire connector. Refer to REMOVAL .
   Fig 1: Locating No. 2 Battery Pack Wire Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying NS1 No. 2 Battery Pack Wire Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   nS1-14 (NODD) - Body ground	Power switch on (IG)	Below 1 V

NG → See step   4 

OK: Go to next step 

1. Turn the power switch off.
2. Remove the service plug grip. Refer to PRECAUTION .
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair information because this may cause a malfunction.

3. Disconnect the low voltage connector from the hybrid vehicle converter.
   Fig 3: Locating Low Voltage Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter. Refer to COMPONENTS .

4. Connect the 2 floor wires to the luggage room junction block assembly.
   Fig 4: Locating Floor Wires

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Insulate the AMD terminal of the removed wire with insulating tape to prevent a short to body ground.
6. Turn the power switch on (IG).
7. Measure the voltage according to the value(s) in the table below.
   Fig 5: Identifying NS1 No. 2 Battery Pack Wire Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   nS1-14 (NODD) - Body ground	Power switch on (IG)	Below 1 V

8. Turn the power switch off.
9. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   nS1-14 (NODD) - Other terminals	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5 

1. Turn the power switch off.
   Fig 6: Identifying A74 HV Control ECU And NS1 Battery Pack Wire Connector Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect connector A74 from the hybrid vehicle control ECU.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   HINT: 

   Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A74-26 (NODD) or nS1-14 (NODD) - Body ground	Power switch on (IG)	Below 1 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6