Toyota Avalon (XX50): Motor/Generator Shutdown Signal (MG Side) Stuck Off (P33BF9F). Hybrid/EV Powertrain Control Module Monitoring Processor Unexpected Operation (P060A94). Hybrid/EV Powertrain Control Module EEPROM Data

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Hybrid / Battery Control / Hybrid Control System / Motor/Generator Shutdown Signal (MG Side) Stuck Off (P33BF9F). Hybrid/EV Powertrain Control Module Monitoring Processor Unexpected Operation (P060A94). Hybrid/EV Powertrain Control Module EEPROM Data

Motor/Generator Shutdown Signal (MG Side) Stuck Off (P33BF9F)

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.

Inverter with converter assembly malfunction

DESCRIPTION

Refer to the description for DTC P321E9F.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P33BF9F	Motor/Generator Shutdown Signal (MG Side) Stuck Off	When the HV gate block function check is performed (when the power switch is turned from on (READY) to off), the HSDN (MG shutdown) signal sent from the hybrid vehicle control ECU is received by the motor generator control ECU (MG ECU) but the 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.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P33BF9F

Motor/Generator Shutdown Signal (MG Side) Stuck Off

When the HV gate block function check is performed (when the power switch is turned from on (READY) to off), the HSDN (MG shutdown) signal sent from the hybrid vehicle control ECU is received by the motor generator control ECU (MG ECU) but the 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

Related Data List

DTC No.	Data List
P33BF9F	Ready Signal Inverter Emergency Shutdown (Main CPU) Inverter Emergency Shutdown (Sub CPU)

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

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 INVERTER WITH CONVERTER ASSEMBLY

Click here

END

Hybrid/EV Powertrain Control Module Monitoring Processor Unexpected Operation (P060A94)

DTC SUMMARY

MALFUNCTION DESCRIPTION

The main CPU and sub CPU of the hybrid vehicle control ECU monitor their internal operation and each other for malfunctions.

The cause of this malfunction may be the following:

Hybrid vehicle control ECU internal malfunction

Hybrid vehicle control ECU malfunction

Vehicle speed sensor malfunction

Discrepancy between motor resolver signal and actual vehicle speed

DESCRIPTION

The hybrid vehicle control ECU monitors its internal operation and will store these DTCs when it detects an internal malfunction.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P060A94	Hybrid/EV Powertrain Control Module Monitoring Processor Unexpected Operation	The sub CPU value received by the main CPU of the hybrid vehicle control ECU exceeds the threshold for a certain period of time. The hybrid vehicle control ECU detects an internal malfunction due to an abnormal calculation or sensor malfunction. (1 trip detection logic)	Hybrid vehicle control ECU	Comes on	Master Warning Light: Comes on

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P060A94

Hybrid/EV Powertrain Control Module Monitoring Processor Unexpected Operation

The sub CPU value received by the main CPU of the hybrid vehicle control ECU exceeds the threshold for a certain period of time.
The hybrid vehicle control ECU detects an internal malfunction due to an abnormal calculation or sensor malfunction.

(1 trip detection logic)

Hybrid vehicle control ECU

Comes on

Master Warning Light:

Comes on

MONITOR DESCRIPTION

The hybrid vehicle control ECU monitors its internal operation. If the internal operation is malfunctioning, the hybrid vehicle control ECU illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs	P060A (INF P060A94): Internal control module monitoring processor performance
Required sensors/components	Hybrid vehicle control 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 P060A (INF P060A94) is not detected

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
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

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.
Turn the power switch on (READY) and wait for 10 seconds or more. [*1]
HINT:

[*1] : Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
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 the normal judgment procedure again.

PROCEDURE

1.	CHECK DTC OUTPUT (MOTOR GENERATOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Check for DTCs.

Powertrain > Motor Generator > Trouble Codes

Result	Proceed to
No DTCs are output, or DTCs except the ones in the table below are also output.	A
Any of the following DTCs are also output.	B

Malfunction Content	Relevant DTC
Sensor and actuator circuit malfunction	P0A3F16	Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
	P0A3F21	Drive Motor "A" Position Sensor Signal Amplitude < Minimum
	P0A3F22	Drive Motor "A" Position Sensor Signal Amplitude > Maximum

HINT:

P060A94 may be output as a result of the malfunction indicated by the DTCs above.
1. The chart above is listed in inspection order of priority.
2. 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.

GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)

2.	CHECK DTC OUTPUT (ABS/VSC/TRAC)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Check for DTCs.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
No DTCs are output, or DTCs except the ones in the table below are also output.	A
Any of the following DTCs are also output.	B

Relevant DTC
C1401	Malfunction in Front Speed Sensor RH Circuit
C1402	Malfunction in Front Speed Sensor LH Circuit
C1405	Open or Short in Front Speed Sensor RH Circuit
C1406	Open or Short in Front Speed Sensor LH Circuit
C1413	Front Speed Sensor RH Circuit Output
C1414	Front Speed Sensor LH Circuit Output

HINT:

P060A94 may be output as a result of the malfunction indicated by the DTCs above.
1. The chart above is listed in inspection order of priority.
2. 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.

GO TO DTC CHART (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

3.	CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
P060A94 only is output.	A
DTCs except P060A94 are output.	B

(e) Turn the power switch off.

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

4.	CHECK FREEZE FRAME DATA (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Read the freeze frame data of DTC P060A94.

Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
Vehicle was stopped ("FR Wheel Speed" and "FL Wheel Speed" are between 0 and 1.4 km/h (0 and 1 mph)) but "Vehicle Speed" was 3 km/h (2 mph) or more	A
Vehicle was stopped ("FR Wheel Speed" and "FL Wheel Speed" are between 0 and 1.4 km/h (0 and 1 mph)) and "Vehicle Speed" was less than 3 km/h (2 mph)	B

(e) Turn the power switch off.

GO TO MOTOR RESOLVER CIRCUIT

REPLACE HYBRID VEHICLE CONTROL ECU

Hybrid/EV Powertrain Control Module EEPROM Data Memory Failure (P062F44)

DESCRIPTION

The hybrid vehicle control ECU monitors its internal operation and will store these DTCs when it detects an internal malfunction. If these DTCs are output, replace the hybrid vehicle control ECU.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P062F44	Hybrid/EV Powertrain Control Module EEPROM Data Memory Failure	ECU internal malfunction (EEPROM error) (1 trip detection logic)	Hybrid vehicle control ECU	Comes on	Master Warning Light: Does not come on

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P062F44

Hybrid/EV Powertrain Control Module EEPROM Data Memory Failure

ECU internal malfunction

(EEPROM error)

(1 trip detection logic)

Hybrid vehicle control ECU

Comes on

Master Warning Light:

Does not come on

MONITOR DESCRIPTION

The hybrid vehicle control ECU monitors its internal operation. If the internal operation is malfunctioning, the hybrid vehicle control ECU illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs	P062F (INF P062F44): Internal control module EEPROM functional
Required sensors/components	Hybrid vehicle control ECU
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately / 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 P062F (INF P062F44) is not detected

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
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

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 15 seconds or more. [*1]
HINT:

[*1] : Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
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 the normal judgment procedure again.

CAUTION / NOTICE / HINT

NOTICE:

There is a possibility that the DTC P062F44 is issued from the ECUs of the ECM and hybrid vehicle control ECU. Use Techstream to conduct a health check to confirm which ECU the DTC is issued from and then inspect the related system.

PROCEDURE

1.	REPLACE HYBRID VEHICLE CONTROL ECU

Click here

END

PCU Interlock Circuit Open (P1CE213,P1CE292). IGB Signal Circuit Short to Auxiliary Battery (P1CFA12). Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off (P33B99F)

Hybrid/EV Powertrain Control Module EEPROM Calibration / Parameter Memory Failure (P062F46). Transmission Fluid Temperature Sensor "C" Voltage Out of Range (P274A1C,P274A1F). Transmission Fluid Temper

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