Lexus NX: Generator Control Module (P0A1A-517,P0A1A-809)
DTC SUMMARY
MALFUNCTION DESCRIPTION
These DTCs indicate that a large current flowed in the inverter for the generator. The cause of this malfunction may be one of the following:
- Internal circuit malfunction in the inverter for the generator
- Malfunction in ECU that controls the inverter
DESCRIPTION
For a description of the inverter.
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If a circuit malfunction, overheating or an internal short circuit of the generator inverter is detected, a signal is sent from the inverter with converter assembly to the MG ECU via the inverter fail signal line.
If an abnormal amount of current flows through the generator inverter, the MG ECU detects it and sends a signal to inform the hybrid vehicle control ECU of the malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A1A-517 | Generator Control Module | Generator inverter fail signal detected (MG ECU malfunction): Overcurrent occurs in the generator inverter.* (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
| P0A1A-809 | Generator Control Module | Abnormal generator inverter current (overcurrent) detected (MG ECU malfunction) (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
*: The inverter with converter assembly may be suspected as a main cause of the malfunction.
MONITOR DESCRIPTION
P0A1A (INF 517):
If excessive current flows through the generator inverter due to an internal short, the generator inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.
P0A1A (INF 809):
If the MG ECU detects that the generator inverter current exceeds the threshold level for a period of time, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
| Related DTCs | P0A1A (INF 517): GFIV detection (overcurrent malfunction) P0A1A (INF 809): Generator inverter abnormal current |
| Required sensors/components | Generator inverter |
| 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 P0A1A (INF 517/809) 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 turn the Techstream on.
- Turn the power switch on (READY).
-
With the shift lever in P, wait for 5 seconds. [A]
HINT:
Check that there are no abnormalities (abnormal sounds, coolant leaks, etc.).
- Drive the vehicle approximately 10 minutes mainly using the engine. [B]
- Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]
-
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 a universal trip, and then check for permanent DTCs again.
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.
-
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 (READY) and wait for 5 seconds or more.
- Drive the vehicle for approximately 10 minutes mainly using the engine.
PROCEDURE
| 1. | 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 CodesNOTICE:
- If P0A7A-203 is output, troubleshoot it first. After completing the troubleshooting for P0A7A-203, perform troubleshooting for this DTC.
- Parts repaired or replaced during troubleshooting for P0A7A-203 do not need to be re-inspected in this diagnostic procedure.
(e) Turn the power switch off.
| P0A7A-203 is also output. | .gif) | GO TO DTC CHART (P0A7A-203) |
|
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| 2. | 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 CodesHINT:
- If P0A7A-203 was not output in step 1 of this diagnostic procedure, check Table 1 below.
- If P0A7A-203 was output in step 1 of this diagnostic procedure, diagnose that DTC first, then check Table 2 below.
| Result | Proceed to |
|---|---|
| P0A1A-517 or 809 only is output, or DTCs except the ones in the tables below are also output. | A |
| Any of the following DTCs are also output. | B |
Table 1:
| Malfunction Content | Relevant DTC | |
|---|---|---|
| Microcomputer malfunction | P0A1A-151, 166, 658, 791 | Generator Control Module |
| P0A1B-198, 786, 794 | Drive Motor "A" Control Module | |
| P0A1C-709, 710, 713, 797 | Drive Motor "B" Control Module | |
| P0A1D (all INF codes)*1 | Hybrid Powertrain Control Module | |
| P1C2A-155 | Generator A/D Converter Circuit | |
| P1C2B-192 | Drive Motor "A" A/D Converter Circuit | |
| P1C2C-706 | Drive Motor "B" A/D Converter Circuit | |
| P1CA6-156 | Generator Control Module Malfunction | |
| P1CA7-193 | Drive Motor Control Module Malfunction | |
| P1CA8-708 | Drive Motor "B" Control Module Malfunction | |
| P1CAC-200 | Generator Position Sensor Angle Malfunction | |
| P1CAD-168 | Drive Motor "A" Position Sensor Angle Malfunction | |
| P1CAE-715 | Drive Motor "B" Position Sensor Angle Malfunction | |
| P1CAF-792 | Generator Position Sensor REF Signal Cycle Malfunction | |
| P1CB0-795 | Drive Motor "A" Position Sensor REF Signal Cycle Malfunction | |
| P1CB1-798 | Drive Motor "B" Position Sensor REF Signal Cycle Malfunction | |
| P1CB2-793 | Generator Position Sensor REF Signal Stop Malfunction | |
| P1CB3-796 | Drive Motor "A" Position Sensor REF Signal Stop Malfunction | |
| P1CB4-799 | Drive Motor "B" Position Sensor REF Signal Stop Malfunction | |
| P3133-659 | Communication Error from Generator to Drive Motor "A" | |
| P3134-661 | Communication Error from Drive Motor "A" to Generator | |
| Power source circuit malfunction | P06B0-163 | Sensor Power Supply "A" Circuit / Open |
| P06D6-511 | Sensor Reference Voltage "F" Circuit / Open | |
| P06E6-164 | Sensor Power Supply "C" Circuit / Open | |
| P1C73-512 | Sensor Standard Voltage "F" Circuit / Open | |
| Sensor and actuator circuit malfunction | P0A3F-243 | Drive Motor "A" Position Sensor Circuit |
| P0A40-500 | Drive Motor "A" Position Sensor Circuit Range / Performance | |
| P0A41-245 | Drive Motor "A" Position Sensor Circuit Low | |
| P0A45-669 | Drive Motor "B" Position Sensor Circuit | |
| P0A46-671 | Drive Motor "B" Position Sensor Circuit Range / Performance | |
| P0A47-670 | Drive Motor "B" Position Sensor Circuit Low | |
| P0A4B-253 | Generator Position Sensor Circuit | |
| P0A4C-513 | Generator Position Sensor Circuit Range / Performance | |
| P0A4D-255 | Generator Position Sensor Circuit Low | |
| P0BEA-290 | Drive Motor "A" Phase V Current Sensor Circuit Range / Performance | |
| P0BEE-298 | Drive Motor "A" Phase W Current Sensor Circuit Range / Performance | |
| P0BF6-683 | Drive Motor "B" Phase V Current Sensor Circuit Range / Performance | |
| P0BFA-685 | Drive Motor "B" Phase W Current Sensor Circuit Range / Performance | |
| P0E05-328 | Generator Phase V Current Sensor Circuit Range / Performance | |
| P0E09-336 | Generator Phase W Current Sensor Circuit Range / Performance | |
| P1C3C-294 | Drive Motor "A" Phase V Current Sensor Correlation | |
| P1C3D-302 | Drive Motor "A" Phase W Current Sensor Correlation | |
| P1C3E-333 | Generator Phase V Current Sensor Correlation | |
| P1C3F-341 | Generator Phase W Current Sensor Correlation | |
| P1C4A-288 | Drive Motor "A" Phase V Current Sensor Sub Circuit Range / Performance | |
| P1C4F-296 | Drive Motor "A" Phase W Current Sensor Sub Circuit Range / Performance | |
| P1C54-326 | Generator Phase V Current Sensor Sub Circuit Range / Performance | |
| P1C59-334 | Generator Phase W Current Sensor Sub Circuit Range / Performance | |
| P1C6D-501 | Drive Motor "A" Phase V Current Sensor Offset Range / Performance | |
| P1C6E-502 | Drive Motor "A" Phase W Current Sensor Offset Range / Performance | |
| P1C6F-688 | Drive Motor "B" Phase V Current Sensor Offset Range / Performance | |
| P1C70-689 | Drive Motor "B" Phase W Current Sensor Offset Range / Performance | |
| P1C71-515 | Generator Phase V Current Sensor Offset Range / Performance | |
| P1C72-516 | Generator Phase W Current Sensor Offset Range / Performance | |
| P33C1-684 | Drive Motor "B" Phase V Current Sensor Sub Circuit Range / Performance | |
| P33C6-686 | Drive Motor "B" Phase W Current Sensor Sub Circuit Range / Performance | |
| P33D8-677 | Drive Motor "B" Phase V Current Sensor Correlation | |
| P33D9-678 | Drive Motor "A" Phase W Current Sensor Correlation | |
| System malfunction | P0C76-523 | Hybrid Battery System Discharge Time Too Long |
| P0D2E-586 | Drive Motor "A" Inverter Voltage Sensor Circuit Range / Performance | |
| P0D2F-266 | Drive Motor "A" Inverter Voltage Sensor Circuit Low | |
| P0D30-267 | Drive Motor "A" Inverter Voltage Sensor Circuit High | |
| P0E32-585 | DC/DC Converter Voltage Sensor "A" Range / Performance | |
| P0E33-589 | DC/DC Converter Voltage Sensor "A" Low | |
| P0E34-590 | DC/DC Converter Voltage Sensor "A" High | |
| P1C2D-587 | Hybrid Battery Voltage / DC/DC Converter Voltage Correlation | |
Table 2:
| Malfunction Content | Relevant DTC | |
|---|---|---|
| Microcomputer malfunction | P0A1A-151, 166, 658, 791 | Generator Control Module |
| P0A1B-198, 786, 794 | Drive Motor "A" Control Module | |
| P0A1C-709, 710, 713, 797 | Drive Motor "B" Control Module | |
| P0A1D (all INF codes)*1 | Hybrid Powertrain Control Module | |
| P1C2A-155 | Generator A/D Converter Circuit | |
| P1C2B-192 | Drive Motor "A" A/D Converter Circuit | |
| P1C2C-706 | Drive Motor "B" A/D Converter Circuit | |
| P1CA6-156 | Generator Control Module Malfunction | |
| P1CA7-193 | Drive Motor Control Module Malfunction | |
| P1CA8-708 | Drive Motor "B" Control Module Malfunction | |
| P1CAC-200 | Generator Position Sensor Angle Malfunction | |
| P1CAD-168 | Drive Motor "A" Position Sensor Angle Malfunction | |
| P1CAE-715 | Drive Motor "B" Position Sensor Angle Malfunction | |
| P1CAF-792 | Generator Position Sensor REF Signal Cycle Malfunction | |
| P1CB0-795 | Drive Motor "A" Position Sensor REF Signal Cycle Malfunction | |
| P1CB1-798 | Drive Motor "B" Position Sensor REF Signal Cycle Malfunction | |
| P1CB2-793 | Generator Position Sensor REF Signal Stop Malfunction | |
| P1CB3-796 | Drive Motor "A" Position Sensor REF Signal Stop Malfunction | |
| P1CB4-799 | Drive Motor "B" Position Sensor REF Signal Stop Malfunction | |
| P3133-659 | Communication Error from Generator to Drive Motor "A" | |
| P3134-661 | Communication Error from Drive Motor "A" to Generator | |
| Power source circuit malfunction | P06B0-163 | Sensor Power Supply "A" Circuit / Open |
| P06D6-511 | Sensor Reference Voltage "F" Circuit / Open | |
| P06E6-164 | Sensor Power Supply "C" Circuit / Open | |
| P1C73-512 | Sensor Standard Voltage "F" Circuit / Open | |
| Sensor and actuator circuit malfunction | P0A3F-243 | Drive Motor "A" Position Sensor Circuit |
| P0A40-500 | Drive Motor "A" Position Sensor Circuit Range / Performance | |
| P0A41-245 | Drive Motor "A" Position Sensor Circuit Low | |
| P0A45-669 | Drive Motor "B" Position Sensor Circuit | |
| P0A46-671 | Drive Motor "B" Position Sensor Circuit Range / Performance | |
| P0A47-670 | Drive Motor "B" Position Sensor Circuit Low | |
| P0A4B-253 | Generator Position Sensor Circuit | |
| P0A4C-513 | Generator Position Sensor Circuit Range / Performance | |
| P0A4D-255 | Generator Position Sensor Circuit Low | |
| P0BEA-290 | Drive Motor "A" Phase V Current Sensor Circuit Range / Performance | |
| P0BEE-298 | Drive Motor "A" Phase W Current Sensor Circuit Range / Performance | |
| P0BF6-683 | Drive Motor "B" Phase V Current Sensor Circuit Range / Performance | |
| P0BFA-685 | Drive Motor "B" Phase W Current Sensor Circuit Range / Performance | |
| P1C3C-294 | Drive Motor "A" Phase V Current Sensor Correlation | |
| P1C3D-302 | Drive Motor "A" Phase W Current Sensor Correlation | |
| P1C3E-333 | Generator Phase V Current Sensor Correlation | |
| P1C3F-341 | Generator Phase W Current Sensor Correlation | |
| P1C4A-288 | Drive Motor "A" Phase V Current Sensor Sub Circuit Range / Performance | |
| P1C4F-296 | Drive Motor "A" Phase W Current Sensor Sub Circuit Range / Performance | |
| P1C6D-501 | Drive Motor "A" Phase V Current Sensor Offset Range / Performance | |
| P1C6E-502 | Drive Motor "A" Phase W Current Sensor Offset Range / Performance | |
| P1C6F-688 | Drive Motor "B" Phase V Current Sensor Offset Range / Performance | |
| P1C70-689 | Drive Motor "B" Phase W Current Sensor Offset Range / Performance | |
| P33C1-684 | Drive Motor "B" Phase V Current Sensor Sub Circuit Range / Performance | |
| P33C6-686 | Drive Motor "B" Phase W Current Sensor Sub Circuit Range / Performance | |
| P33D8-677 | Drive Motor "B" Phase V Current Sensor Correlation | |
| P33D9-678 | Drive Motor "A" Phase W Current Sensor Correlation | |
| System malfunction | P0C76-523 | Hybrid Battery System Discharge Time Too Long |
| P0D2E-586 | Drive Motor "A" Inverter Voltage Sensor Circuit Range / Performance | |
| P0D2F-266 | Drive Motor "A" Inverter Voltage Sensor Circuit Low | |
| P0D30-267 | Drive Motor "A" Inverter Voltage Sensor Circuit High | |
| P0E32-585 | DC/DC Converter Voltage Sensor "A" Range / Performance | |
| P0E33-589 | DC/DC Converter Voltage Sensor "A" Low | |
| P0E34-590 | DC/DC Converter Voltage Sensor "A" High | |
| P1C2D-587 | Hybrid Battery Voltage / DC/DC Converter Voltage Correlation | |
HINT:
- *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
-
P0A1A-517 or P0A1A-809 may be output as a result of the malfunction indicated by the DTCs above.
- The chart above is listed in inspection order of priority.
- Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
(e) Turn the power switch off.
| B | | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
|
| 3. | CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) |
Click here
| Result | Proceed to |
|---|---|
| OK | A |
| NG (The connector is not connected securely.) | B |
| NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) | C |
| A | | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
| B | | CONNECT SECURELY |
| C | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Generator Control Module (P0A1A-658,P0A1A-791,P1C2A-155,P1CA6-156,P3133-659)
DESCRIPTION The MG ECU, which is built into the inverter with converter assembly, monitors its internal operation and will store DTCs if the system is malfunctioning. If any of the following DTCs are
Drive Motor "A" Control Module (P0A1B-198)
DESCRIPTION The MG ECU, which is built into the inverter with converter assembly, monitors its internal operation and will store DTCs if the system is malfunctioning. If any of the following DTCs are
Drive Motor "A" Control Module (P0A1B-503)
DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that an overvoltage in the inverter has occurred. The cause of this malfunction may be one of the following: Internal inverter malfunction
In
SEE MORE:
Parts Location
PARTS LOCATION ILLUSTRATION *A w/o AVS - - *1 FRONT AXLE HUB SUB-ASSEMBLY RH - FRONT SPEED SENSOR ROTOR RH *2 FRONT SPEED SENSOR RH *3 FRONT AXLE HUB SUB-ASSEMBLY LH - FRONT SPEED SENSOR ROTOR LH *4 FRONT SPEED SENSOR LH *5 REAR SPEED SENSOR RH *6 REAR AXLE HU
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the lighting system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary battery voltage with the power
