DTC P2519-766: A/C Request "A" Circuit: Procedure

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

   Result

   Result	Proceed to
   DTC P2519-766 is not output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P0AE6-225	Hybrid Battery Precharge Contactor Control Circuit Low

B → See step   9 

A: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

1. Check that the service plug grip is not installed.
   NOTE:

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

2. Check the connection of the battery smart unit connectors.
   Fig 1: Identifying Connection Of z37, z22 & z15 Battery Smart Unit Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   The connectors are connected securely and there are no contact problems.

NG → CONNECT SECURELY 

OK: Go to next step 

1. Check that the service plug grip is not installed.
   NOTE:

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

2. Turn the power switch on (IG).
3. Connect an oscilloscope between the battery smart unit terminals specified in the table below, and measure the waveform.
   Fig 2: Identifying z15 Battery Smart Unit Terminals & Signal Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connector (Battery Smart Unit)

   Item	Contents
   Terminal	z15-4 (IDH) - z15-5 (GND)
   Equipment Setting	2 V/DIV., 2 ms./DIV.
   Condition	Power switch on (IG)

   Result

   Result	Proceed to
   The waveform does not appears as shown in the illustrationFig 2.	A
   The waveform appears as shown in the illustrationFig 2.	B

   HINT: 

   The frequency of the waveform differs according to operation conditions of the cooling fan of the hybrid vehicle converter.

   Turn the power switch off.

B → See step   7 

A: Go to next step 

1. Check that the service plug grip is not installed.
   Fig 3: Identifying Connector z17 From The Hybrid Vehicle Converter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

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

2. Disconnect connector z17 from the hybrid vehicle converter.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   z17-5 (IDH) - Body ground	Power switch on (IG)	11 to 14 V

   Result

   Result	Proceed to
   NG	A
   OK	B

   TEXT IN ILLUSTRATION
   
   

   *1	Rear view of wire harness connector (to Hybrid Vehicle Converter (DC/DC Converter))

5. Turn the power switch off.
6. Connect the hybrid vehicle converter connector.

B → See step   8 

A: Go to next step 

1. Check that the service plug grip is not installed.
   Fig 4: Identifying z15 From The Battery Smart Unit & z17 Hybrid Vehicle Converter (DC/DC Converter)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect connector z15 from the battery smart unit connector.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Specified Condition
   z15-4 (IDH) - Body ground	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle converter (DC/DC converter) connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

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

   Standard Resistance (Check for Open)

   Tester Connection	Specified Condition
   z15-4 (IDH) - z17-5 (IDH)	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Specified Condition
   z15-4 (IDH) or z17-5 (IDH) - Body ground	10 kΩ or more

   TEXT IN ILLUSTRATION
   
   

   *1	Rear view of wire harness connector (to Battery Smart Unit)
   *2	Rear view of wire harness connector (to Hybrid Vehicle Converter (DC/DC Converter))

7. Connect the battery smart unit connector.
8. Connect the hybrid vehicle converter connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   7