Lexus NX: DC / DC Converter Status Circuit High Input (P0A10-592)
DESCRIPTION
Refer to the description for DTC P0A09-591.
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A10-592 | DC / DC Converter Status Circuit High Input | Short to +B in the DC/DC converter VLO signal line (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0A09-591.
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CAUTION / NOTICE / HINT
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
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After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
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HINT:
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
- Turn the power switch on (IG) and wait for 10 seconds or more.
PROCEDURE
| 1. | CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM) |
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| NG | .gif) | GO TO STEP 4 |
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| 2. | CLEAR DTC |
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| 3. | CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes(e) Turn the power switch off.
| P0A10-592 is not output. | | CHECK FOR INTERMITTENT PROBLEMS |
| P0A10-592 is output again. | | REPLACE HYBRID VEHICLE CONTROL ECU |
| 4. | CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - HYBRID VEHICLE CONTROL ECU) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the A59 inverter with converter assembly connector.
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(c) Disconnect the A60 hybrid vehicle control ECU connector.
(d) Connect the cable to the negative (-) auxiliary battery terminal.
(e) Turn the power switch on (IG).
| (f) Measure the voltage according to the value(s) in the table below. Standard Voltage:
NOTICE: Turning the power switch on (IG) with the inverter with converter assembly connector and the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection. |
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(g) Turn the power switch off.
(h) Disconnect the cable from the negative (-) auxiliary battery terminal.
(i) Reconnect the A60 hybrid vehicle control ECU connector.
(j) Reconnect the A59 inverter with converter assembly connector.
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | REPLACE HYBRID VEHICLE CONTROL ECU |
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| 6. | CLEAR DTC |
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| 7. | CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes(e) Turn the power switch off.
| DTC P0A10-592 is not output. | | COMPLETED |
| DTC P0A10-592 is output again. | | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
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