Lexus ES: Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off (P33B99F)
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU detects malfunctions which prevent the inverter with converter assembly emergency shutdown circuit (HSDN) from shutting down the hybrid control system. Detection is performed when the power switch is turned on (IG) and during the shutdown sequence when the power switch is turned off. If any of the following condition is detected, this DTC will be stored. If the following conditions are not detected, DTC P321E9F will be stored.
- Hybrid vehicle control ECU malfunction
DESCRIPTION
Refer to the description for DTC P321E9F.
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P33B99F | Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off | When the HV gate shutdown function check is performed (when the power switch is turned from on (READY) to off) and checked at the motor generator control ECU (MG ECU), the shutdown signals sent by the main CPU and sub CPU of the hybrid vehicle control ECU do not match. (1 trip detection logic) | Hybrid vehicle control ECU | Does not come on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P33B99F | - |
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 (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 (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. | REPLACE HYBRID VEHICLE CONTROL ECU |
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Installation
INSTALLATION PROCEDURE 1. INSTALL HV BATTERY JUNCTION BLOCK ASSEMBLY CAUTION: Be sure to wear insulated gloves and protective goggles. (a) Install the HV battery junction block assembly to the HV battery with the 4 nuts. Torque: 7.5 N·m {76 kgf·cm, 66 in·lbf} NOTICE: If the HV battery junction b
Removal
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