DTC P0A10-592: DC / DC Converter Status Circuit High Input: Procedure

CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)

Connect the Techstream to the DLC3.

Fig 1: Locating No. 2 Battery Pack Wire Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying NS1 No. 2 Battery Pack Wire Connector And Waveform
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the power switch on (IG).

Connect an oscilloscope to the No. 2 battery pack wire connector terminals specified in the table below, and measure the waveform.

Item	Contents
Terminal	nS1-12 (VLO) - nS1-9 (GND)
Equipment Setting	5 V/DIV., 50 ms./DIV.
Condition	Power switch on (IG)

The waveform appears as shown in the illustration.

HINT:

For the removal and installation procedures related to inspection of the waveform of the No. 2 battery pack wire connector. Refer to REMOVAL .
Perform this inspection with the No. 2 battery pack wire connected.

NG → See step 5

OK: Go to next step

CLEAR DTC
1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
2. Read and record the DTCs and freeze frame data.
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Clear DTCs and freeze frame data.
NEXT: Go to next step

CHECK DTC OUTPUT (HV)

Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

Result	Proceed to
P0A10-592 is not output.	A
P0A10-592 is output again.	B

B → See step 9

A: Go to next step

CHECK FOR INTERMITTENT PROBLEMS
1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .
NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK → See step 9

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR)

Turn the power switch off.
Disconnect the No. 2 battery pack wire connector.

Fig 3: Locating No. 2 Battery Pack Wire Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the power switch on (IG).

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

Fig 4: Identifying NS1 No. 2 Battery Pack Wire Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

Tester Connection	Switch Condition	Specified Condition
nS1-12 (VLO) - Body ground	Power switch on (IG)	Below 1 V

NOTE:

Turning the power switch on (IG) with the No. 2 battery pack wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG → See step 8

OK: Go to next step

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONVERTER CONNECTOR)
WARNING:
Be sure to wear insulated gloves.
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. Check the connection of the low voltage connector of the hybrid vehicle converter.
  
  Fig 5: Locating Service Plug Grip
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Locating Service Plug Grip
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK
  
  The connector is connected securely and there are no contact problems.
  
  HINT:
  
  For the removal and installation procedures related to inspection of the connection of the low voltage connector of the hybrid vehicle converter. Refer to COMPONENTS .
NG → CONNECT SECURELY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)

Disconnect the low voltage connector from the hybrid vehicle converter.

Fig 7: Identifying NS1 No. 2 Battery Pack Wire Connector And Z92 Hybrid Vehicle Converter Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

Tester Connection	Switch Condition	Specified Condition
nS1-12 (VLO) - Other terminals	Power switch off	10 kΩ or higher
z82-11 (VLO) - Other terminals	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 10