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

CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).

Connect an oscilloscope between the battery pack wire terminals specified in the table below, and measure the waveform.

Fig 1: Identifying Battery Pack Wire Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Item	Contents
Terminal	zR2-7(VLO) - zR2-10(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 battery pack wire connector. Refer to REMOVAL .
Perform this inspection with the 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 - BATTERY PACK WIRE CONNECTOR)

Turn the power switch off.
Disconnect the battery pack wire connector.

Fig 2: Locating 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 3: Identifying Battery Pack Wire Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

Tester Connection	Switch Condition	Specified Condition
zR2-7 (VLO) - Body ground	Power switch on (IG)	Below 1 V

NOTE:

Turning the power switch on (IG) with the 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 REMOVAL .
  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 4: Locating Low Voltage Connector Of Hybrid Vehicle Converter
  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 REMOVAL .
NG → CONNECT SECURELY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)

Disconnect the low voltage connector from the hybrid vehicle converter.

Fig 5: Locating Low Voltage Connector Of Hybrid Vehicle Converter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Fig 6: Identifying z35 And zR2 Connector Terminals

Standard resistance

Tester Connection	Switch Condition	Specified Condition
zR2-7 (VLO) - Other terminals	Power switch off	10 kΩ or higher
z35-3 (VLO) - Other terminals	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 10