RM36D0EC _51 Engine / Hybrid System _083048 HYBRID / BATTERY CONTROL _0709511 HYBRID CONTROL SYSTEM C

HYBRID / BATTERY CONTROL HYBRID CONTROL SYSTEM P312387 Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message

DESCRIPTION

Refer to the description for P0D2D16.

for 2WD: Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>MOTOR GENERATOR CONTROL SYSTEM (for 2WD with LITHIUM-ION BATTERY [Production date from 2021/08])>P0D2D16202104,999999,_51,_083048,_0481415,RM100000001XAZE_04,P0D2D16

for AWD: Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>MOTOR GENERATOR CONTROL SYSTEM (for AWD with LITHIUM-ION BATTERY)>P0D2D16202304,999999,_51,_083048,_0587253,RM1000000029T3C_04,P0D2D16

The MG ECU, which is built into in the inverter with converter assembly, controls motor (MG2) based on commands from the hybrid vehicle control ECU assembly.

The hybrid vehicle control ECU assembly monitors communication data and detects malfunctions.

A communication error between the MG ECU and the hybrid vehicle control ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	Note
P312387	Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message	Error in reception from inverter with converter assembly (MG ECU) via serial communication (out of communication standard) (1 trip detection logic)	· Wire harness or connector · Inverter with converter assembly · Hybrid vehicle control ECU assembly · PCU fuse	Comes on	Master Warning: Comes on	SAE Code: P3123

CONFIRMATION DRIVING PATTERN

HINT:: ·

After repair has been completed, clear the DTCs 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>UTILITY202409,999999,_51,_083048,_0709511,RM100000002NGYK,

·

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

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>DTC CHECK / CLEAR202409,999999,_51,_083048,_0709511,RM100000002NGYO,

Connect the GTS to the DLC3.

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

With power switch on (IG) and wait for 2 minutes 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, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for the inverter low-voltage circuit.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>Inverter Low-voltage Circuit202409,999999,_51,_083048,_0709511,RM100000002NH17_04,

CAUTION / NOTICE / HINT

CAUTION:: Refer to the precautions before inspecting high voltage circuit.; Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>PRECAUTION202409,999999,_51,_083048,_0709511,RM100000002NGYF,

PROCEDURE

1.INSPECT FUSE (PCU)

Remove the PCU fuse from the No. 3 relay block and junction block assembly.

1.052,2.958 1.521,2.75 true 0.167,0.135 0.479,0.333 0.313,0.198 10 false *1 0.865,2.906 1.177,3.104 0.313,0.198 10 false *2

*1	No. 3 Relay Block and Junction Block Assembly
*2	PCU Fuse

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
PCU fuse	Always	Below 1 Ω

Install the PCU fuse.

Result:

Proceed to
OK
NG

2.CLEAR DTC

9.REPLACE FUSE (PCU)

2.CLEAR DTC

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>P06881F202409,999999,_51,_083048,_0709511,RM100000002NGZ0_06_0017,P06881F

Result:

Proceed to
NEXT

3.CHECK DIAGNOSIS RELATED INFORMATION AND DTC OUTPUT (HYBRID CONTROL)

Connect the GTS to the DLC3.

Turn the power switch on (IG) and wait for 2 minutes or more.

Enter the following menus: Powertrain / Hybrid Control / Utility / Diagnosis Related Information.

Powertrain > Hybrid Control > Utility

Tester Display
Diagnosis Related Information

50005 397 56

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

Powertrain > Hybrid Control > Trouble Codes: 50001 397

Check for DTCs.

Result:

Result	Proceed to
P312387 is listed in Diagnosis Related Information or DTC P312387 is output.	A
P312387 is not listed in Diagnosis Information and DTC P312387 is not output.	B

Turn the power switch off.

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

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>CHECK FOR INTERMITTENT PROBLEMS202409,999999,_51,_083048,_0709511,RM100000002NGYJ,

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

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>P056014202409,999999,_51,_083048,_0709511,RM100000002NGYV_11_0001,P056014

Result:

Proceed to
OK
NG

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

CONNECT SECURELY

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

CAUTION:: Be sure to wear insulated gloves.

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.

Check the connection condition of the low voltage connectors of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and the connector for water and foreign matter.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE201910,999999,_V1,_083040,_0402301,RM100000001JHC9,

0.26,0.031 0.573,0.229 0.313,0.198 10 false *A 3.573,0.094 3.885,0.292 0.313,0.198 10 false *B

for 2WD

for AWD

NOTICE:: Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.

OK:

- The connector is connected securely.

- The terminals are not deformed and are connected securely.

- No water or foreign matter in the connector.

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

HINT:: When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

6.CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY POWER SOURCE CIRCUIT)

CONNECT SECURELY

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY POWER SOURCE CIRCUIT)

CAUTION:: Be sure to wear insulated gloves.

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.

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

for 2WD: Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for 2WD)>REMOVAL202409,999999,_51,_083048,_0400693,RM100000002NE9H,

for AWD: Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for AWD)>REMOVAL202409,999999,_51,_083048,_0586671,RM100000002NE9J,

*1: for 2WD

*2: for AWD

0.313,1 0.708,1.229 0.396,0.229 0.354,3.281 0.75,3.51 0.396,0.229 1.74,1.021 2.646,0.396 true 1.885,1 2.885,0.938 true 1.771,1.323 1.49,2.063 true 1.885,1.313 2.115,2.135 true 2.917,3.458 2.052,3.219 true 2.656,2.417 1.958,3.219 true 2.563,4.125 2.073,3.563 true 1.885,4.313 1.948,3.552 true 0.438,3.302 0.896,3.5 0.458,0.198 10 false A87 0.385,1.031 0.844,1.229 0.458,0.198 10 false A51 2.979,3.396 3.427,3.583 0.448,0.188 10 false GND1 2.031,2.208 2.615,2.406 0.583,0.198 10 false GND1 1.281,2.104 1.865,2.302 0.583,0.198 10 false GND2 2.698,2.292 3.281,2.49 0.583,0.198 10 false GND2 2.698,0.292 3.01,0.49 0.313,0.198 10 false +B2 2.917,0.854 3.229,1.052 0.313,0.198 10 false +B 2.615,4.156 2.927,4.354 0.313,0.198 10 false +B 1.781,4.344 2.094,4.542 0.313,0.198 10 false +B2 0.375,0.792 0.688,0.99 0.313,0.198 10 false *A 0.438,3.083 0.75,3.281 0.313,0.198 10 false *B 0.167,0.156 0.479,0.354 0.313,0.198 10 false *a

*A	for 2WD
*B	for AWD
*a	Front view of wire harness connector (to 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
A51-24 (GND1) - Body ground	Power switch off	Below 1 Ω
A51-23 (GND2) - Body ground	Power switch off	Below 1 Ω

for AWD:
Tester Connection	Condition	Specified Condition
A87-9 (GND1) - Body ground	Power switch off	Below 1 Ω
A87-8 (GND2) - Body ground	Power switch off	Below 1 Ω

Connect the cable to the negative (-) auxiliary battery terminal.

Turn the power switch on (IG).

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

Standard Voltage:

for 2WD:
Tester Connection	Condition	Specified Condition
A51-6 (+B) - Body ground	Power switch on (IG)	11 to 14 V
A51-5 (+B2) - Body ground	Power switch on (IG)	11 to 14 V

for AWD:
Tester Connection	Condition	Specified Condition
A87-36 (+B) - Body ground	Power switch on (IG)	11 to 14 V
A87-35 (+B2) - Body ground	Power switch on (IG)	11 to 14 V

NOTICE:: Turning the power switch on (IG) with the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.

Disconnect the cable from the negative (-) auxiliary battery terminal.

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

*1: for 2WD

*2: for AWD

Result:

Proceed to
OK
NG

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

CAUTION:: Be sure to wear insulated gloves.

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.

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

*1: for 2WD

*2: for AWD

Disconnect the A31 hybrid vehicle control ECU assembly connector.

Connect the cable to the negative (-) auxiliary battery terminal.

Turn the power switch on (IG).

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

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 0.427,2.24 0.719,1.521 true 0.823,2.26 0.802,1.51 true 3.427,2.167 3.229,1.26 true 2.823,2.229 3.135,1.26 true 5,2.208 5.177,1.469 true 5.573,2.281 5.375,1.375 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 2.406,0.365 2.865,0.563 0.458,0.198 10 false *a 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 0.229,2.302 0.844,2.5 0.615,0.198 10 false HMCL 5.448,2.302 6.063,2.5 0.615,0.198 10 false HMCL 4.771,2.271 5.385,2.469 0.615,0.198 10 false HMCH 0.719,2.323 1.333,2.521 0.615,0.198 10 false HMCH 3.333,2.219 3.948,2.417 0.615,0.198 10 false HMCL 2.635,2.25 3.25,2.448 0.615,0.198 10 false HMCH

*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 Voltage:

Tester Connection	Condition	Specified Condition
A31-2 (HMCL) - Body ground	Power switch on (IG)	Below 1 V
A31-13 (HMCH) - Body ground	Power switch on (IG)	Below 1 V

NOTICE:: Turning the power switch on (IG) with the hybrid vehicle control ECU assembly connector and the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.

Disconnect the cable from the negative (-) auxiliary battery terminal.

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

Standard Resistance (Check for Open):

for 2WD:
Tester Connection	Condition	Specified Condition
A51-19 (HMCL) - A31-2 (HMCL)	Power switch off	Below 1 Ω
A51-20 (HMCH) - A31-13 (HMCH)	Power switch off	Below 1 Ω

for AWD:
Tester Connection	Condition	Specified Condition
A87-4 (HMCL) - A31-2 (HMCL)	Power switch off	Below 1 Ω
A87-3 (HMCH) - A31-13 (HMCH)	Power switch off	Below 1 Ω

Standard Resistance (Check for Short):

for 2WD:
Tester Connection	Condition	Specified Condition
A51-19 (HMCL) or A31-2 (HMCL) - Body ground and other terminals	Power switch off	10 kΩ or higher
A51-20 (HMCH) or A31-13 (HMCH) - Body ground and other terminals	Power switch off	10 kΩ or higher

for AWD:
Tester Connection	Condition	Specified Condition
A87-4 (HMCL) or A31-2 (HMCL) - Body ground and other terminals	Power switch off	10 kΩ or higher
A87-3 (HMCH) or A31-13 (HMCH) - Body ground and other terminals	Power switch off	10 kΩ or higher

Reconnect the A31 hybrid vehicle control ECU assembly connector.

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

*1: for 2WD

*2: for AWD

Result:

Proceed to
OK
NG

8.CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

CAUTION:: Be sure to wear insulated gloves.

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.

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

*1: for 2WD

*2: for AWD

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

2.49,0.26 2.948,0.573 0.458,0.313 3.083,2.333 3.365,1.281 true 3.906,2.323 3.563,1.385 true 0.313,0.24 0.625,0.396 0.313,0.156 10 false *a 2.615,0.365 3.25,0.615 0.635,0.25 10 false A31 2.781,2.354 3.417,2.604 0.635,0.25 10 false HMCL 3.906,2.354 4.542,2.604 0.635,0.25 10 false HMCH

Component with harness connected
(Hybrid Vehicle Control ECU Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A31-2 (HMCL) - A31-13 (HMCH)	Power switch off	110 to 130 Ω

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

*1: for 2WD

*2: for AWD

Result:

Proceed to
OK
NG

REPLACE INVERTER WITH CONVERTER ASSEMBLY

for 2WD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for 2WD)>REMOVAL202409,999999,_51,_083048,_0400693,RM100000002NE9H,

for AWD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for AWD)>REMOVAL202409,999999,_51,_083048,_0586671,RM100000002NE9J,

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID VEHICLE CONTROL ECU>REMOVAL202409,999999,_51,_083048,_0400692,RM100000002NNM9,

9.REPLACE FUSE (PCU)

1.052,2.958 1.521,2.75 true 0.167,0.135 0.479,0.333 0.313,0.198 10 false *1 0.865,2.906 1.177,3.104 0.313,0.198 10 false *2

*1	No. 3 Relay Block and Junction Block Assembly
*2	PCU Fuse

Replace the PCU fuse.

Turn the power switch on (READY).

Check if there is an open circuit in the PCU fuse in the No. 3 relay block and junction block assembly.

OK:: There is no open circuit in the PCU fuse.

HINT:: If the fuse does not become open again after turning the power switch on (READY), it can be assumed that the previous fuse failed due to age.

Turn the power switch off.

Result:

Proceed to
OK
NG

COMPLETED

10.CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - PCU FUSE)

CAUTION:: Be sure to wear insulated gloves.

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.

Remove the PCU fuse from the No. 3 relay block and junction block assembly.

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

*1: for 2WD

*2: for AWD

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

3.51,2.594 3.927,2.833 0.417,0.24 3.49,0.875 3.906,1.115 0.417,0.24 5.188,2.854 5.688,3.354 true 5.125,2.854 5.021,3.438 true 4.896,0.896 4.844,1.771 true 4.99,0.917 5.531,1.427 true 0.24,0.156 0.552,0.354 0.313,0.198 10 false *1 2.073,2.74 2.385,2.938 0.313,0.198 10 false *2 3.271,0.188 3.583,0.385 0.313,0.198 10 false *a 4.896,3.51 5.354,3.708 0.458,0.198 10 false +B2 5.688,3.406 5.927,3.594 0.24,0.188 10 false +B 3.594,2.625 4.052,2.823 0.458,0.198 10 false A87 3.573,0.917 4.031,1.115 0.458,0.198 10 false A51 5.573,1.49 5.813,1.677 0.24,0.188 10 false +B 4.708,1.813 5.167,2.01 0.458,0.198 10 false +B2 3.969,0.917 4.427,1.115 0.458,0.198 10 false *A 3.958,2.615 4.417,2.813 0.458,0.198 10 false *B

*A	for 2WD	*B	for AWD
*1	No. 3 Relay Block and Junction Block Assembly	*2	PCU Fuse Terminal
*a	Front view of wire harness connector (to Inverter with Converter Assembly)	-	-

Standard Resistance (Check for Short):

for 2WD:
Tester Connection	Condition	Specified Condition
A51-6 (+B), A51-5 (+B2) or 2 (PCU fuse terminal) - Body ground and other terminals	Power switch off	10 kΩ or higher

for AWD:
Tester Connection	Condition	Specified Condition
A87-36 (+B), A87-35 (+B2) or 2 (PCU fuse terminal) - Body ground and other terminals	Power switch off	10 kΩ or higher

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

*1: for 2WD

*2: for AWD

Install the PCU fuse.

Result:

Proceed to
OK
NG

11.REPLACE INVERTER WITH CONVERTER ASSEMBLY

12.REPAIR OR REPLACE HARNESS OR CONNECTOR

11.REPLACE INVERTER WITH CONVERTER ASSEMBLY

for 2WD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for 2WD)>REMOVAL202409,999999,_51,_083048,_0400693,RM100000002NE9H,

for AWD:

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>INVERTER WITH CONVERTER (for AWD)>REMOVAL202409,999999,_51,_083048,_0586671,RM100000002NE9J,

Result:

Proceed to
NEXT

REPLACE FUSE (PCU)

12.REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

Proceed to
NEXT

REPLACE FUSE (PCU)