Lexus NX: DC/DC Converter Voltage Sensor "A" Low (P0E33-589,P0E34-590)
DESCRIPTION
The MG ECU, which is built into the inverter with converter assembly, detects pre-boosting high voltage (VL) using the voltage sensor in the boost converter to control boosting. The MG ECU also monitors the boost converter voltage sensor signal line and detects malfunctions.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0E33-589 | DC/DC Converter Voltage Sensor "A" Low | Boost converter voltage (VL) signal is stuck (Low) (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| P0E34-590 | DC/DC Converter Voltage Sensor "A" High | Boost converter voltage (VL) signal is stuck (High) (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P0E33-589 | VL-Voltage before Boosting |
| P0E34-590 |
MONITOR DESCRIPTION
The MG ECU monitors the boost converter voltage (VL) sensor circuit. If the MG ECU detects an open or short circuit malfunction of the VL sensor circuit, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
| Related DTCs | P0E33 (INF 589): VL malfunction (Disconnection and GND short) P0E34 (INF 590): VL malfunction (+B short) |
| Required sensors/components | Boost converter |
| Frequency of operation | Continuous |
| Duration | TMC's intellectual property |
| MIL operation | 1 driving cycle |
| Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
| Other conditions belong to TMC's intellectual property | - |
TYPICAL MALFUNCTION THRESHOLDS
| TMC's intellectual property | - |
COMPONENT OPERATING RANGE
| Hybrid vehicle control ECU | DTC P0E33 (INF 589) is not detected DTC P0E34 (INF 590) is not detected |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 30 seconds or more.
- Turn the power switch on (IG) and after 5 seconds, turn the power switch off. [A]
- Repeat [A] 3 times. [B]
- Turn the power switch on (IG) and turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
-
Read the current DTCs.
HINT:
- If a current DTC is output, the system is malfunctioning.
- If current DTCs are not output, perform the following steps to check for permanent DTCs.
- Check that the permanent DTCs are cleared.
- If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.
CAUTION / NOTICE / HINT
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 5 seconds or more.
PROCEDURE
| 1. | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
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HINT:
The boost converter voltage (VL) sensor is connected to the MG ECU inside the inverter with converter assembly. If P0E33-589 or P0E34-590 is output, replace the inverter with converter assembly.
| NEXT | .gif) | COMPLETED |
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect
Removal
REMOVAL PROCEDURE 1. REMOVE SERVICE PLUG GRIP Click here 2. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY Click here 3. REMOVE REAR ENGINE UNDER COVER RH Click here 4. REMOVE FAN AND GENERATOR V BELT Click here 5. DISCONNECT RADIATOR RESERVE TANK ASSEMBLY Click here 6. REMOVE AIR CLEANER C
