Lexus ES: DC/DC Converter Voltage Sensor "A"(VL) Circuit Voltage Below Threshold (P0E3116,P0E3117,P0E311F)
DESCRIPTION
The motor generator control 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 motor generator control 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 |
|---|---|---|---|---|---|
| P0E3116 | DC/DC Converter Voltage Sensor "A"(VL) Circuit Voltage Below Threshold | Boost converter voltage (VL) signal is stuck (Low) (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| P0E3117 | DC/DC Converter Voltage Sensor "A"(VL) Circuit Voltage Above Threshold | Boost converter voltage (VL) signal is stuck (High) (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| P0E311F | DC/DC Converter Voltage Sensor "A"(VL) Circuit Intermittent | Boost converter voltage (VL) signal is stuck (Low) or (High) detected when DTC P0C7917, P0D3319, P0E5717, P1C5D19 or P1C5F19 is stored. (1 trip detection logic) | Inverter with converter assembly | Does not come on | Master Warning Light: Does not come on |
| DTC No. | Data List |
|---|---|
| P0E3116 P0E3117 P0E311F | VL Voltage |
MONITOR DESCRIPTION
The motor generator control ECU monitors the boost converter voltage (VL) sensor circuit. If the motor generator control ECU detects an open or short circuit malfunction of the VL sensor circuit, the ECU will illuminate the MIL and set a DTC.
MONITOR STRATEGY
| Related DTCs | P0E33 (INF P0E3116): DC/DC Converter Voltage Sensor "A" Range check (Low voltage) P0E34 (INF P0E3117): DC/DC Converter Voltage Sensor "A" Range check (High voltage) |
| Required sensors/components | DC/DC converter voltage sensor |
| Frequency of operation | Continuous |
| Duration | TMC's intellectual property |
| MIL operation | Immediately |
| 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
| Motor generator control ECU | DTC P0E33 (INF P0E3116) is not detected DTC P0E34 (INF P0E3117) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
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-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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- 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 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
-
Turn the power switch on (READY) and wait for 5 seconds or more. [*1]
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
CAUTION / NOTICE / HINT
CAUTION:
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Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
-
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
-
After removing the service plug grip from the HV battery, 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.
*a
Without waiting for 10 minutes
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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PROCEDURE
| 1. | CHECK DTC OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.
Powertrain > Hybrid Control > Trouble Codes Powertrain > Motor Generator > Trouble Codes(d) Check for DTCs.
| Result | Proceed to |
|---|---|
| None of the following DTCs are output. | A |
| DTCs of hybrid control system in the tables below are output. | B |
| DTCs of motor generator control system in the tables below are output. | C |
| System | Relevant DTC | |
|---|---|---|
| Hybrid control system | P0AD915 | Hybrid/EV Battery Positive Contactor Circuit Short to Battery or Open |
| P0ADD15 | Hybrid/EV Battery Negative Contactor Circuit Short to Battery or Open | |
| P1C8449 | High Voltage Power Resource Circuit Short during Ready ON | |
| P312387 | Lost Communication with Missing Message | |
| Motor generator control system | P312487 | Lost Communication between Drive Motor "A" and HV ECU Missing Message |
HINT:
P0E3116, P0E3117 or P0E311F may be stored due to a malfunction which also causes the DTCs in the preceding table to be stored. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
(e) Turn the power switch off.
| A | .gif) | REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS |
| B | | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
| C | | GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) |
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SEE MORE:
Diagnostic Trouble Code Chart
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Generator Temperature Sensor Voltage Out of Range (P0A361C,P0A361F)
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Open or short in generator te
