RM38T0EC _51 Engine / Hybrid System _144957 HYBRID / BATTERY CONTROL _0604232 HYBRID CONTROL SYSTEM C

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P321E9F  Motor/Generator Shutdown Signal Stuck Off  


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 ignition switch is turned to ON and during the shutdown sequence when the ignition switch is turned off.

The cause of this malfunction may be one of the following:

Hybrid vehicle control ECU and inverter with converter assembly shutdown circuit malfunction
·

Hybrid vehicle control ECU malfunction

·

Connector or wire harness malfunction (between hybrid vehicle control ECU and inverter with converter assembly) malfunction

·

Inverter with converter assembly malfunction



DESCRIPTION

The hybrid vehicle control ECU sends a block signal to the motor generator control ECU (MG ECU) to shut down the power supply to the motor. When the system is not in the on (READY) state, it sends an HSDN (MG shutdown signal) signal from the hybrid vehicle control ECU to the motor generator control ECU (MG ECU) to check the function of the HV gate block. When a malfunction is detected in the HV gate block function, DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P321E9F Motor/Generator Shutdown Signal Stuck Off When the HV gate block function check is performed (when the ignition switch is turned from ON (READY) to off), the inverter voltage (VH) drops and current flows in the inverter.
(1 trip detection logic)
·

Wire harness or connector

·

Hybrid vehicle control ECU

·

Inverter with converter assembly


Does not come on Master Warning:
Comes on 		SAE Code:
P321E

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 hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>UTILITY


1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON and turn the GTS on.

3.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4.

Turn the ignition switch off and wait for 2 minutes or more.

5.

Turn the ignition switch to ON (READY) and wait for 30 seconds or more.

6.

Turn the ignition switch off and wait for 2 minutes or more.

7.

Turn the ignition switch to ON (READY) and wait for 30 seconds or more.

8.

Turn the ignition switch off and wait for 2 minutes or more.

9.

Turn the ignition switch to ON and turn the GTS on.

10.

Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

11.

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, perform driving pattern again.




CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>PRECAUTION


NOTICE:
·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the auxiliary battery

HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART




HINT:
·

P321E9F may be output as a result of the malfunction indicated by the DTCs in table below.

(a)

The chart above is listed in inspection order of priority.

(b)

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.)



Malfunction Content Relevant DTC
Sensor and actuator circuit malfunction P33B99F Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off
P33BF9F Motor/Generator Shutdown Signal (MG Side) Stuck Off


PROCEDURE

1.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>P056014

Result:
Proceed to
OK
NG



OK

2.CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

NG

CONNECT SECURELY

2.CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>MOTOR GENERATOR CONTROL SYSTEM>P033506

Result:
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

3.CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - HYBRID VEHICLE CONTROL ECU)

B

CONNECT SECURELY

C

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
CAUTION:

Be sure to wear insulated gloves.


a.

Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the inverter with converter assembly connector.


c.

Disconnect the hybrid vehicle control ECU connector.


d.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A192-26 (HSDN) - A197-9 (HSDN) Ignition switch off Below 1 Ω
A192-26 (HSDN) or A197-9 (HSDN) - Body ground and other terminals Ignition switch off 10 kΩ or higher


HINT:

As there might be an intermittent malfunction, inspect the following items even if the measured resistance is as specified.

Check that each connector between the inverter with converter assembly and hybrid vehicle control ECU is not loose or disconnected.



e.

Reconnect the hybrid vehicle control ECU connector.


f.

Reconnect the inverter with converter assembly connector.


Result:
Proceed to
OK
NG



OK

4.CHECK INVERTER WITH CONVERTER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK INVERTER WITH CONVERTER ASSEMBLY
CAUTION:

Be sure to wear insulated gloves.


a.

Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the inverter with converter assembly connector.


c.
A515060C19
1.042,0.25 1.427,0.49 0.385,0.24 1.229,0.969 0.906,1.76 true 1.5,1.281 1.74,1.729 true 0.083,0.052 0.396,0.25 0.313,0.198 10 false *a 1.073,0.271 1.531,0.469 0.458,0.198 10 false A192 1.594,1.771 2.208,1.969 0.615,0.198 10 false HSDN 0.792,1.781 1.406,1.979 0.615,0.198 10 false GND1
*a Component without harness connected
(Inverter with Converter Assembly)


Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A192-26 (HSDN) - A192-4 (GND1) Ignition switch off 2.65 to 3.55 kΩ


NOTICE:

Be sure not to damage or deform the terminal being inspected.



d.

Reconnect the inverter with converter assembly connector.


Result:
Proceed to
OK
NG



OK

REPLACE HYBRID VEHICLE CONTROL ECU

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID VEHICLE CONTROL ECU>REMOVAL


NG

REPLACE INVERTER WITH CONVERTER ASSEMBLY

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER>REMOVAL