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

HYBRID / BATTERY CONTROL HYBRID CONTROL SYSTEM U011187 Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message

DESCRIPTION

The hybrid vehicle control ECU assembly transmits and receives signals via CAN communication to and from the battery ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	Note
U011187	Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message	The hybrid vehicle control ECU assembly cannot receive signals from the battery ECU assembly (1 trip detection logic)	· Battery ECU assembly · Hybrid vehicle control ECU assembly · Wire harness or connector	Comes on	Master Warning: Comes on	SAE Code: U0111

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>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.

Turn the power switch on (READY) 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

0.792,4.167 4.771,4.365 3.979,0.198 10 false Hybrid Vehicle Control ECU Assembly 5.5,4.771 7.135,5.01 1.635,0.24 10 false Battery ECU Assembly 0.719,4.615 2.5,4.896 1.781,0.281 10 false Auxiliary Battery 0.719,5.385 2.49,5.594 1.771,0.208 10 false : CAN Communication Line 2.938,1.646 3.896,1.875 0.958,0.229 10 false IGCT 4.156,1.104 5.115,1.333 0.958,0.229 10 false IGCT NO.2 1.333,1.094 2.292,1.323 0.958,0.229 10 false IGCT 1.531,1.396 2.49,1.625 0.958,0.229 10 false MREL 1.531,2.719 2.49,2.948 0.958,0.229 10 false CA4H 1.542,3.104 2.5,3.333 0.958,0.229 10 false CA4L 5.958,3.104 6.917,3.333 0.958,0.229 10 false CA1L 5.958,2.729 6.917,2.958 0.958,0.229 10 false CA1H 5.979,0.938 6.938,1.167 0.958,0.229 10 false IGCT 2,1.26 2.958,1.49 0.958,0.229 10 false 47 2.76,1.281 3.719,1.51 0.958,0.229 10 false 1 3.354,1.26 4.313,1.49 0.958,0.229 10 false 2 2.75,0.854 3.708,1.083 0.958,0.229 10 false 3 3.333,0.844 4.292,1.073 0.958,0.229 10 false 5 1.219,0.833 2.177,1.063 0.958,0.229 10 false 1 1.646,0.833 2.604,1.063 0.958,0.229 10 false 2 4.677,0.833 5.635,1.063 0.958,0.229 10 false 2 4.198,0.833 5.156,1.063 0.958,0.229 10 false 1 5.688,0.792 6.646,1.021 0.958,0.229 10 false 13 5.708,2.542 6.667,2.771 0.958,0.229 10 false 25 5.698,2.938 6.656,3.167 0.958,0.229 10 false 26 1.99,2.552 2.948,2.781 0.958,0.229 10 false 10 2.01,2.938 2.969,3.167 0.958,0.229 10 false 23 5.948,0.302 6.906,0.531 0.958,0.229 10 false AM 5.74,0.156 6.698,0.385 0.958,0.229 10 false 1 4.167,0.177 5.125,0.406 0.958,0.229 10 false 1 4.646,0.177 5.604,0.406 0.958,0.229 10 false 2 4.052,0.448 5.01,0.677 0.958,0.229 10 false ECU-B NO.2 1.271,0.458 2.229,0.688 0.958,0.229 10 false MAIN 2.688,0.167 3.646,0.396 0.958,0.229 10 false 1 3.125,0.156 4.083,0.385 0.958,0.229 10 false 2 5.979,4.083 6.938,4.313 0.958,0.229 10 false GND1 5.979,3.646 6.938,3.875 0.958,0.229 10 false GND 5.688,3.469 6.646,3.698 0.958,0.229 10 false 27 5.76,3.906 6.719,4.135 0.958,0.229 10 false 3 2.417,0.438 3.781,0.76 1.365,0.323 10 false INP STD_NO.1-3 5.51,4.594 5.969,4.792 0.458,0.198 10 false z26 0.823,4 1.281,4.198 0.458,0.198 10 false A30

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,

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.

·

As interlock circuit DTCs or other DTCs may be stored when the power switch is turned to on in the following procedure, make sure to clear the DTCs after inspection.

PROCEDURE

1.CHECK DTC OUTPUT (HV BATTERY)

Connect the GTS to the DLC3.

Turn the power switch on (IG).

Enter the following menus: Powertrain / HV Battery / Trouble Codes.

Check and record any HV system DTCs and freeze frame data. Check for DTCs.

Powertrain > HV Battery > Trouble Codes: 50001 398

Result:

Result	Proceed to
DTCs related to HV Battery are not output.	A
DTCs related to HV Battery are output.	B

Turn the power switch off.

2.CHECK BATTERY ECU ASSEMBLY (IGCT VOLTAGE)

GO TO DTC CHART (HV BATTERY SYSTEM)

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2.CHECK BATTERY ECU ASSEMBLY (IGCT VOLTAGE)

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 No. 1 HV battery hose.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>BATTERY ECU (for LITHIUM-ION BATTERY [Production date from 2021/08])>REMOVAL202409,999999,_51,_083048,_0481190,RM100000002NEA2_01_0417,

2.188,0.823 2.604,1.073 0.417,0.25 2.271,0.854 2.563,1.052 0.292,0.198 10 true z26

Disconnect the z26 battery ECU assembly connector.

NOTICE:: Before disconnecting the connector, check that it is not loose or disconnected.

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

1.49,0.344 1.938,0.583 0.448,0.24 1.167,2.156 0.406,1.656 true 2.229,3.115 1.365,2.406 true 1.167,2.26 0.802,3.125 true 0.146,0.115 0.604,0.531 0.458,0.417 10 false *a 1.594,0.375 2.052,0.792 0.458,0.417 10 false z26 0.188,1.563 0.646,1.979 0.458,0.417 10 false AM 2.313,3.083 2.927,3.292 0.615,0.208 10 false GND 0.646,3.146 1.115,3.365 0.469,0.219 10 false IGCT

*a	Front view of wire harness connector (Battery ECU Assembly)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
z26-1 (AM) - z26-27 (GND)	Power switch off	11 to 14 V
z26-13 (IGCT) - z26-27 (GND)	Power switch on (IG)	11 to 14 V

NOTICE:: ·

Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

·

If the power switch is turned on (READY) with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

HINT:: As there might be an intermittent malfunction in the battery ECU assembly power source circuit, inspect the following even if the measured voltage is as specified:; ·

Installation condition of fuse(s) (before removing fuse(s)) (IGCT circuit)

·

Fuse condition (before and after removing fuse(s)) (IGCT circuit)

·

Connection condition of connectors (IGCT circuit)

·

Wire harness condition (IGCT circuit)

·

Wire harness condition (GND circuit)

Turn the power switch off.

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

Reconnect the z26 battery ECU assembly connector.

Install the No. 1 HV battery hose.

Result:

Proceed to
OK
NG

3.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - BATTERY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

3.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - BATTERY 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 A30 hybrid vehicle control ECU assembly connector.

NOTICE:: ·

Before disconnecting the connector, check that it is not loose or disconnected.

·

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

Remove the No. 1 HV battery hose.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>BATTERY ECU (for LITHIUM-ION BATTERY [Production date from 2021/08])>REMOVAL202409,999999,_51,_083048,_0481190,RM100000002NEA2_01_0417,

2.188,0.823 2.604,1.073 0.417,0.25 2.271,0.854 2.563,1.052 0.292,0.198 10 true z26

Disconnect the z26 battery ECU assembly connector.

NOTICE:: ·

Before disconnecting the connector, check that it is not loose or disconnected.

·

Check the terminals of the connector for deformation and corrosion.

1.5,0.094 1.896,0.375 0.396,0.281 1.542,2.375 1.938,2.656 0.396,0.281 0.521,1.563 1.271,1.76 true 0.479,0.865 1.354,1.76 true 1.74,4.313 2.135,3.604 true 2.604,4.292 2.25,3.469 true 0.083,0.063 0.396,0.26 0.313,0.198 10 false *a 0.083,2.292 0.396,2.49 0.313,0.198 10 false *b 1.583,0.156 1.896,0.354 0.313,0.198 10 false z26 1.625,2.438 1.938,2.635 0.313,0.198 10 false A30 0.073,1.469 0.552,1.667 0.479,0.198 10 false CA1H 2.417,4.344 2.896,4.542 0.479,0.198 10 false CA4H 0.083,0.771 0.563,0.969 0.479,0.198 10 false CA1L 1.521,4.354 2,4.552 0.479,0.198 10 false CA4L

*a	Front view of wire harness connector (to Battery ECU Assembly)
*b	Front view of wire harness connector (to Hybrid Vehicle Control ECU assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z26-25 (CA1H) - A30-10 (CA4H)	Power switch off	Below 1 Ω
z26-26 (CA1L) - A30-23 (CA4L)	Power switch off	Below 1 Ω
A30-10 (CA4H) - Other terminals and body ground	Power switch off	10 kΩ or higher
A30-23 (CA4L) - Other terminals and body ground	Power switch off	10 kΩ or higher

NOTICE:: Make sure that each connector between the battery ECU assembly and hybrid vehicle control ECU assembly is not loose or disconnected and its terminals are not deformed or corroded.

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:

Tester Connection	Condition	Specified Condition
z26-25 (CA1H) - Body ground	Power switch on (IG)	Below 1 V
z26-26 (CA1L) - Body ground	Power switch on (IG)	Below 1 V

NOTICE:: ·

Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

·

If the power switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

Turn the power switch off.

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

Reconnect the z26 battery ECU assembly connector.

Install the No. 1 HV battery hose.

Reconnect the A30 hybrid vehicle control ECU assembly connectors.

Result:

Proceed to
OK
NG

4.CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.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.

Remove the No. 1 HV battery hose.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>BATTERY ECU (for LITHIUM-ION BATTERY [Production date from 2021/08])>REMOVAL202409,999999,_51,_083048,_0481190,RM100000002NEA2_01_0417,

2.188,0.823 2.604,1.073 0.417,0.25 2.271,0.854 2.563,1.052 0.292,0.198 10 true z26

Disconnect the z26 battery ECU assembly connector.

NOTICE:: Before disconnecting the connector, check that it is not loose or disconnected.

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

Turn the power switch on (IG).

1.49,0.354 1.938,0.594 0.448,0.24 1.167,2.396 0.542,3.021 true 1.375,3.031 1.292,2.406 true 2.115,3.073 1.375,2.396 true 0.146,0.115 0.604,0.531 0.458,0.417 10 false *a 1.594,0.406 2.063,0.667 0.469,0.26 10 false z26 0.281,3.094 0.969,3.313 0.688,0.219 10 false CA1H 1.229,3.094 1.844,3.302 0.615,0.208 10 false CA1L 2.01,3.115 2.625,3.323 0.615,0.208 10 false GND

*a	Front view of wire harness connector (to Battery ECU Assembly)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
z26-25 (CA1H) - z26-27 (GND)	Power switch on (IG)	2.5 to 3.5 V
z26-26 (CA1L) - z26-27 (GND)	Power switch on (IG)	1.5 to 2.5 V

NOTICE:: ·

Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

·

If the power switch is turned on (IG) with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the 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:

Tester Connection	Condition	Specified Condition
z26-25 (CA1H) - z26-26 (CA1L)	Power switch off	108 to 132 Ω

Reconnect the z26 battery ECU assembly connector.

Install the No. 1 HV battery protector.

Result:

Proceed to
OK
NG

REPLACE BATTERY ECU ASSEMBLY

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REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

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