Lexus NX: 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 output, replace the inverter with converter assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A1A-658 | Generator Control Module | MG ECU internal malfunction: Calculation check error (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| P0A1A-791 | Generator Control Module | MG ECU internal malfunction: R/D converter communication error (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| P1C2A-155 | Generator A/D Converter Circuit | MG ECU internal malfunction: A/D converter malfunction (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| P1CA6-156 | Generator Control Module Malfunction | MG ECU internal malfunction: CPU ROM-RAM error (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| P3133-659 | Communication Error from Generator to Drive Motor "A" | MG ECU internal malfunction: Communication error (from generator (MG1) to motor (MG2)) (1 trip detection logic) | Inverter with converter assembly | Comes on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P0A1A-791 | Generator (MG1) Rev |
| P0A1A-658 P1C2A-155 P1CA6-156 P3133-659 | - |
MONITOR DESCRIPTION
The MG ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these tests, the MG ECU checks the result of the generator CPU self-test. If the MG ECU detects a "Fail" from the generator CPU self-test, it will conclude that there is an internal malfunction in the generator CPU and the hybrid vehicle control ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
| Related DTCs | P0A1A (INF 658): MG CPU ALU malfunction P0A1A (INF 791): R/D converter communication malfunction P1C2A (INF 155): A/D malfunction (1 MG CPU) P1CA6 (INF 156): RAM and ROM destruction P3133 (INF 659): MG CPU communication malfunction (1 MG CPU to 2 MG CPU) |
| Required sensors/components | Inverter with converter assembly (MG ECU) |
| 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 658/791) is not detected DTC P1C2A (INF 155) is not detected DTC P1CA6 (INF 156) is not detected DTC P3133 (INF 659) is not detected |
CONFIRMATION DRIVING PATTERN
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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 30 seconds or more.
- Turn the power switch on (READY) and after 1 minute or more, 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. [C]
-
Read the current DTCs.
HINT:
- If a current DTC is output, the system is malfunctioning.
- If current DTCs are not output, 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:
-
If DTC P0A1A-658, P0A1A-791, P1C2A-155 or P3133-659 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
- Turn the power switch on (IG) and wait for 5 seconds or more.
-
If DTC P1CA6-156 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
- Turn the power switch on (IG) and wait for 1 minute or more.
PROCEDURE
| 1. | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
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| NEXT | .gif) | COMPLETED |
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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
Drive Motor "A" Control Module (P0A1B-505,P0A1B-806)
DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that a large current flowed in the inverter for the motor. The cause of this malfunction may be one of the following: Internal inverter malfunc
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
The back door closer system troubleshooting procedure is based on the premise that the power back door system is operating normally. Check the power back door system first before troubleshooting the back door closer system.
Click here
Use the following procedure
Removal
REMOVAL PROCEDURE 1. PRECAUTION Click here 2. REMOVE FRONT BUMPER COVER (a) for Sport Pacakge: Click here (b) except Sport Pacakge: Click here 3. REMOVE NO. 3 ENGINE ROOM WIRE (a) for Sport Pacakge: Click here (b) except Sport Pacakge: Click here 4. REMOVE FRONT CORNER ULTRASONIC SENSOR
