RM36D0EC _51 Engine / Hybrid System _083048 HYBRID / BATTERY CONTROL _0709511 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 assembly 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.

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

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

Hybrid vehicle control ECU assembly malfunction

·

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

·

Inverter with converter assembly malfunction



DESCRIPTION

The hybrid vehicle control ECU assembly 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 assembly 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 power 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 assembly

·

Inverter with converter assembly


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

Related Data List
DTC No. Data List
P321E9F
·

VH-Voltage after Boosting

·

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


1.

Connect the GTS to the DLC3.

2.

Turn the power switch on (IG) and turn the GTS on.

3.

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

4.

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

5.

Turn the power switch on (READY) and wait for 30 seconds or more.

6.

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

7.

Turn the power switch on (READY) and wait for 30 seconds or more.

8.

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

9.

Turn the power switch on (IG) 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


PROCEDURE

1.CHECK DTC OUTPUT (HYBRID CONTROL)
a.

Connect the GTS to the DLC3.


b.

Turn the power switch on (IG).


c.

Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.


d.

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes
50001 397
Result:
Result Proceed to
P321E9F only is 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 P33B99F Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off
P33BF9F Motor/Generator Shutdown Signal (MG Side) Stuck Off

HINT:
·

P321E9F may be output as a result of the malfunction indicated by the DTCs above.

(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.)





e.

Turn the power switch off.



A

2.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>DIAGNOSTIC TROUBLE CODE CHART


2.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

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

Result:
Proceed to
OK
NG



OK

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

NG

CONNECT SECURELY

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

for 2WD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>MOTOR GENERATOR CONTROL SYSTEM (for 2WD with LITHIUM-ION BATTERY [Production date from 2021/08])>P033500

for AWD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>MOTOR GENERATOR CONTROL SYSTEM (for AWD with LITHIUM-ION BATTERY)>P033500

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

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

B

CONNECT SECURELY

C

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - HYBRID VEHICLE CONTROL ECU 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the A51*1 or A87*2 inverter with converter assembly connector.

*1: for 2WD

*2: for AWD



c.

Disconnect the A31 hybrid vehicle control ECU assembly connector.


d.

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

A556781C02
5.698,0.292 6.125,0.531 0.427,0.24 3.094,0.302 3.521,0.542 0.427,0.24 0.688,0.302 1.115,0.542 0.427,0.24 1.219,2.177 0.969,1.531 true 3.583,2.167 3.385,1.26 true 6.438,2.281 6.24,1.375 true 5.792,0.323 6.25,0.521 0.458,0.198 10 false A31 0.781,0.344 1.24,0.542 0.458,0.198 10 false A51 3.188,0.344 3.646,0.542 0.458,0.198 10 false A87 4.896,0.365 5.354,0.563 0.458,0.198 10 false *b 0.146,0.375 0.604,0.573 0.458,0.198 10 false *a 1.156,0.333 1.615,0.531 0.458,0.198 10 false *A 3.563,0.344 4.021,0.542 0.458,0.198 10 false *B 6.281,2.292 6.896,2.49 0.615,0.198 10 false HSDN 3.448,2.219 4.063,2.417 0.615,0.198 10 false HSDN 1.188,2.271 1.802,2.469 0.615,0.198 10 false HSDN 2.479,0.385 2.938,0.583 0.458,0.198 10 false *a
*A for 2WD *B for AWD
*a Front view of wire harness connector
(to Inverter with Converter Assembly) 		*b Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly)


Standard Resistance:
for 2WD:
Tester Connection Condition Specified Condition
A51-22 (HSDN) - A31-9 (HSDN) Power switch off Below 1 Ω
A51-22 (HSDN) or A31-9 (HSDN) - Body ground and other terminals Power switch off 10 kΩ or higher

for AWD:
Tester Connection Condition Specified Condition
A87-6 (HSDN) - A31-9 (HSDN) Power switch off Below 1 Ω
A87-6 (HSDN) or A31-9 (HSDN) - Body ground and other terminals Power switch off 10 kΩ or higher



e.

Reconnect the A31 hybrid vehicle control ECU assembly connector.


f.

Reconnect the A51*1 or A87*2 inverter with converter assembly connector.

*1: for 2WD

*2: for AWD



Result:
Proceed to
OK
NG



OK

5.CHECK INVERTER WITH CONVERTER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.



b.

Disconnect the A51*1 or A87*2 inverter with converter assembly connector.

*1: for 2WD

*2: for AWD



c.
A556780C02
0.906,0.135 1.26,0.406 0.354,0.271 0.99,2.354 1.344,2.625 0.354,0.271 0.313,3.854 0.792,3.208 true 1.083,4.146 1.135,3.24 true 0.406,2.063 0.823,1.323 true 1.594,1.906 1.094,1.333 true 0.969,0.188 1.427,0.385 0.458,0.198 10 false A51 1.063,2.406 1.521,2.604 0.458,0.198 10 false A87 1.406,2.417 1.865,2.615 0.458,0.198 10 false *B 1.313,0.198 1.771,0.396 0.458,0.198 10 false *A 0.052,0.042 0.51,0.24 0.458,0.198 10 false *a 0.979,4.198 1.594,4.396 0.615,0.198 10 false HSDN 1.677,1.948 2.292,2.146 0.615,0.198 10 false HSDN 0.26,2.104 0.875,2.302 0.615,0.198 10 false GND1 0.125,3.875 0.74,4.073 0.615,0.198 10 false GND1
*A for 2WD
*B for AWD
*a Component without harness connected
(Inverter with Converter Assembly)


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

Standard Resistance:
for 2WD:
Tester Connection Condition Specified Condition
A51-22 (HSDN) - A51-24 (GND1) Power switch off 2.65 to 3.55 kΩ

for AWD:
Tester Connection Condition Specified Condition
A87-6 (HSDN) - A87-9 (GND1) Power switch off 2.65 to 3.55 kΩ


NOTICE:

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



d.

Reconnect the A51*1 or A87*2 inverter with converter assembly connector.

*1: for 2WD

*2: for AWD



Result:
Proceed to
OK
NG



OK

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

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


NG

REPLACE INVERTER WITH CONVERTER ASSEMBLY

for 2WD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for 2WD)>REMOVAL

for AWD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for AWD)>REMOVAL