Lexus ES: Motor Shutdown Stuck Off (P1C6A9F)
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU detects malfunctions which prevent the motor (MG2) inverter shutdown circuit shutting down the hybrid vehicle control system. Detection is performed during the shutdown sequence when the power switch is turned off. If motor (MG2) inverter operation is detected after a shutdown signal was sent to the motor (MG2) inverter, the hybrid vehicle control ECU will determine that there is a malfunction and store this DTC.
The cause of this malfunction may be the following:
- Inverter with converter assembly malfunction
DESCRIPTION
The motor generator control ECU (MG ECU) sends shutdown signals to the inverter to cut the power supply to the generator (MG1) and motor (MG2). If the power switch is turned off, the motor generator control ECU (MG ECU) will send a GSDN (MG1 Shutdown Signal) signal and MSDN (MG2 shutdown signal) signal to check the function of the HV gate block. If a shutdown malfunction is detected, this DTC will be stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P1C6A9F | Motor Shutdown Stuck Off | When the HV gate block function check is performed (when the power switch is turned from on (READY) to off), the MSDN (MG2 shutdown) signal is sent but the motor (MG2) inverter current and voltage (VH) do not decrease. (1 trip detection logic) | Inverter with converter assembly | Does not come on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P1C6A9F |
|
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.
Click here .gif)
- 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 (READY) and wait for 30 seconds or more.
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / 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.
PROCEDURE
| 1. | REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS |
Click here
| NEXT | .gif) | END |
READ NEXT:
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CAUTION / NOTICE / HINT HINT:
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*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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