Lexus ES: Drive Motor "A" Phase V Current(High Resolution) Circuit Short to Battery (P0A6012,...,P0A631F)
DESCRIPTION
The motor generator control ECU (MG ECU), which is built into the inverter with converter assembly, monitors its internal operation and will store DTCs if it detects a malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A6012 | Drive Motor "A" Phase V Current(High Resolution) Circuit Short to Battery | Motor phase V current sensor high resolution signal circuit (short to +B) (MIV) (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
| P0A6014 | Drive Motor "A" Phase V Current(High Resolution) Circuit Short to Ground or Open | Motor phase V current sensor high resolution signal circuit (short to ground or open) (MIV) (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
| P0A601C | Drive Motor "A" Phase V Current(High Resolution) Circuit Voltage Out of Range | Motor phase V current sensor high resolution signal circuit (out of range) (MIV) (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
| P0A601F | Drive Motor "A" Phase V Current(High Resolution) Circuit Intermittent | Out of range detected in motor current sensor when DTC P0C7917, P0D3319, P0E5717, P1C5D19 or P1C5F19 is stored. (1 trip detection logic) |
| Does not come on | Master Warning Light: Does not come on |
| P0A6312 | Drive Motor "A" Phase W Current(High Resolution) Circuit Short to Battery | Motor phase W current sensor high resolution signal circuit (short to +B) (MIW) (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
| P0A6314 | Drive Motor "A" Phase W Current(High Resolution) Circuit Short to Ground or Open | Motor phase W current sensor high resolution signal circuit (short to ground or open) (MIW) (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
| P0A631C | Drive Motor "A" Phase W Current(High Resolution) Circuit Voltage Out of Range | Motor phase W current sensor high resolution signal circuit (out of range) (MIW) (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
| P0A631F | Drive Motor "A" Phase W Current(High Resolution) Circuit Intermittent | Out of range detected in motor current sensor when DTC P0C7917, P0D3319, P0E5717, P1C5D19 or P1C5F19 is stored. (1 trip detection logic) |
| Does not come on | Master Warning Light: Does not come on |
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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- 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.
- With power switch on (IG) and wait for 5 seconds or more.
- 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 driving pattern 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.
-
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 (MOTOR GENERATOR CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Motor Generator / Trouble Codes.
(d) Check for DTCs.
Powertrain > Motor Generator > Trouble Codes| Result | Proceed to |
|---|---|
| P0A6012, P0A6014, P0A601C, P0A601F, P0A6312, P0A6314, P0A631C or P0A631F only is output, or DTCs except the ones in the table below are also output. | A |
| Any of the following DTCs including pending DTCs are also output. | B |
| Malfunction Content | Relevant DTC | |
|---|---|---|
| Power source circuit malfunction | P06B01C | Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range |
| P06D61C | Generator Control Module Offset Power Circuit Voltage Out of Range | |
| System malfunction | P0A7873 | Drive Motor "A" Inverter Actuator Stuck Closed |
HINT:
-
P0A6012, P0A6014, P0A601C, P0A601F, P0A6312, P0A6314, P0A631C or P0A631F may be output as a result of the malfunctions 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 | .gif) | GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) |
|
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| 2. | CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) |
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| 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 |
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