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

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P0C7396  Motor Electronics Coolant Pump "A" Component Internal Failure  


DTC SUMMARY

MALFUNCTION DESCRIPTION


This DTC is stored when the inverter water pump assembly is malfunctioning. The cause of this malfunction may be one of the following:

Inverter water pump assembly malfunction
·

Inverter water pump assembly internal malfunction

·

Open or short in wire harness

·

Improperly connected connector


Hybrid cooling system malfunction
·

Foreign matter in inverter water pump assembly

·

Hybrid cooling system coolant is frozen


HINT:

If this DTC is stored, the driving torque may be restricted.



DESCRIPTION

The inverter water pump assembly transmits rotation speed information to the hybrid vehicle control ECU assembly. The hybrid vehicle control ECU assembly monitors the speed and detects malfunctions.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure The inverter water pump assembly revolution speed is abnormally high or low (or stopped) for 1 minute or more.
(1 trip detection logic)
·

Inverter cooling system

·

Wire harness or connector

·

Inverter water pump assembly

·

Hybrid vehicle control ECU assembly


Comes on Master Warning:
Comes on 		SAE Code:
P0C73

HINT:

The inverter water pump assembly operates when the power switch is on (READY).


Related Data List
DTC No. Data List
P0C7396
·

Inverter Water Pump Revolution

·

Inverter Water Pump Duty Ratio

·

Inverter Coolant Water Temperature



Related Active Test
DTC No. Active Test
P0C7396 Activate the Inverter Water Pump

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

·

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

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>DTC CHECK / CLEAR



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 (IG) and turn the GTS on.

6.

Turn the power switch on (READY). [*1]

7.

Wait for 2 minutes or more. [*2]

HINT:

[*1] to [*2] : Normal judgment procedure.

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


8.

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

9.

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

C408113E20
5.365,5.604 7.073,6.365 1.708,0.76 10 false Hybrid Vehicle Control ECU Assembly 5.781,5.115 6.094,5.313 0.313,0.198 10 false E1 5.792,4.5 6.354,4.74 0.563,0.24 10 false MREL 5.781,3 6.344,3.24 0.563,0.24 10 false NIWP 5.781,1.5 6.344,1.74 0.563,0.24 10 false IWP 6.531,2.615 6.854,2.885 0.323,0.271 10 false +B 6.563,3.896 6.885,4.167 0.323,0.271 10 false +B 5.375,5.094 5.688,5.292 0.313,0.198 10 false A30 5.417,4.885 5.729,5.083 0.313,0.198 10 false 15 2.854,4.063 3.167,4.26 0.313,0.198 10 false A53 5.427,4.385 5.74,4.583 0.313,0.198 10 false 47 5.365,3.104 5.677,3.302 0.313,0.198 10 false A31 5.365,1.594 5.677,1.792 0.313,0.198 10 false A31 5.396,2.896 5.708,3.094 0.313,0.198 10 false 32 5.406,1.385 5.719,1.583 0.313,0.198 10 false 31 5.042,3.625 5.354,3.823 0.313,0.198 10 false 1 4.615,3.74 5.063,3.99 0.448,0.25 10 false GND 4.594,3.01 5.156,3.25 0.563,0.24 10 false NWP 5.042,3 5.354,3.198 0.313,0.198 10 false 2 4.594,1.51 5.156,1.75 0.563,0.24 10 false SWP 5.052,1.49 5.365,1.688 0.313,0.198 10 false 3 3.177,2.135 4.104,2.479 0.927,0.344 10 false Drive Circuit 2.646,1.188 3.208,1.427 0.563,0.24 10 false +BWP 2.479,1.188 2.792,1.385 0.313,0.198 10 false 4 1.26,4.938 1.792,5.271 0.531,0.333 10 false IGCT 1.823,4.354 2.792,4.573 0.969,0.219 10 false INV W/P NO. 1 1.792,1.563 2.104,1.76 0.313,0.198 10 false 1 1.781,1.167 2.094,1.365 0.313,0.198 10 false 3 0.396,2.865 0.802,3.052 0.406,0.188 10 false MAIN 0.073,5.667 1.479,5.927 1.406,0.26 10 false from Auxiliary Battery 0.354,6.135 3.219,6.333 2.865,0.198 10 false IWP: Inverter water pump assembly drive duty 0.333,6.458 3.396,6.656 3.063,0.198 10 false NIWP: Inverter water pump assembly speed signal 2.854,4.229 4.802,4.469 1.948,0.24 10 false Inverter Water Pump Assembly 5.365,4.604 5.677,4.802 0.313,0.198 10 false A30 0.281,1.417 1.104,1.885 0.823,0.469 10 false INV W/PMP NO. 2 1.177,2.031 1.74,2.25 0.563,0.219 10 false INV W/P 1.042,1.167 1.354,1.365 0.313,0.198 10 false 5 1.031,1.552 1.344,1.75 0.313,0.198 10 false 2 0.635,4.375 1.094,4.552 0.458,0.177 10 false IGCT 1.771,4.125 2.083,4.323 0.313,0.198 10 false 5 1.031,4.115 1.344,4.313 0.313,0.198 10 false 3 1.031,4.479 1.344,4.677 0.313,0.198 10 false 2 1.771,4.5 2.083,4.698 0.313,0.198 10 false 1 0.823,1.146 1.135,1.344 0.313,0.198 10 false 2 0.594,1.146 0.906,1.344 0.313,0.198 10 false 1 0.615,4.094 0.927,4.292 0.313,0.198 10 false 1 2.042,4.094 2.354,4.292 0.313,0.198 10 false 1 0.823,4.104 1.135,4.302 0.313,0.198 10 false 2 2.281,4.083 2.594,4.281 0.313,0.198 10 false 2

CAUTION / NOTICE / HINT

NOTICE:

If this vehicle is jump started, etc. and excessive voltage is applied to the auxiliary battery, the inverter water pump assembly may suspend control as a self-protection function and store DTCs.

(When the auxiliary battery voltage returns to normal, the inverter water pump assembly will resume normal operation. In this case it is not necessary to replace the inverter water pump assembly.)


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
P0C7396 only is output, or DTCs except the ones in the table below are also output. A
Any of the following DTCs including pending DTCs are also output. B


Malfunction Content Relevant DTC
Microcomputer malfunction P060647 Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure
P06881F ECM/PCM Power Relay Sense Circuit Intermittent
Sensor and actuator circuit malfunction P314A31 Motor Electronics Coolant Pump "A" No Signal

HINT:

P0C7396 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.



A

2.READ VALUE USING GTS (INVERTER WATER PUMP REVOLUTION)

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

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


2.READ VALUE USING GTS (INVERTER WATER PUMP REVOLUTION)
NOTICE:

Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.


HINT:
·

When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.

·

When the inverter water pump assembly signal line (SWP - IWP) is open or its connection is faulty, the inverter water pump assembly is operated forcibly.



a.

Connect the GTS to the DLC3.


b.

Turn the power switch on (IG).


c.

Enter the following menus: Powertrain / Hybrid Control / Data List / Inverter Water Pump Revolution.

Powertrain > Hybrid Control > Data List
Tester Display
Inverter Water Pump Revolution
50003 397 60

d.

According to the display on the GTS, read the Data List.

OK:
Tester Display Condition Specified Condition
Inverter Water Pump Revolution Power switch on (IG) 200 rpm or less


HINT:

When the inverter water pump assembly is not operating, the Data List item "Inverter Water Pump Revolution" displays a value 200 rpm or less.



e.

Turn the power switch off.


Result:
Proceed to
OK
NG



OK

3.CLEAR DTC

NG

6.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)
3.CLEAR DTC

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>P06881F

Result:
Proceed to
NEXT



NEXT

4.PERFORM ACTIVE TEST USING GTS (ACTIVATE THE INVERTER WATER PUMP)
4.PERFORM ACTIVE TEST USING GTS (ACTIVATE THE INVERTER WATER PUMP)
NOTICE:
·

Make sure that the HV coolant level is above the low line of the inverter reserve tank.

·

Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.



HINT:

When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.


a.

Connect the GTS to the DLC3.


b.

Turn the power switch on (IG).


c.

Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Inverter Water Pump.


d.

Select the Data List item "Inverter Water Pump Revolution".

Powertrain > Hybrid Control > Active Test
Active Test Display
Activate the Inverter Water Pump
Data List Display
Inverter Water Pump Revolution
50004 397 1 60

e.

According to the display on the GTS, perform the Active Test "Activate the Inverter Water Pump" and, check the value of the Data List item "Inverter Water Pump Revolution".

OK:
Tester Display Condition Specified Condition
Inverter Water Pump Revolution Power switch on (IG)
During Active Test 		3000 to 9500 rpm


HINT:
·

Perform the Active Test with the inverter coolant temperature between -15 and 65°C (5 to 149°F).

·

When the inverter water pump assembly is not operating, the Data List item "Inverter Water Pump Revolution" displays a value 200 rpm or less.




f.

Turn the power switch off.


Result:
Proceed to
OK
NG



OK

5.CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING)

NG

6.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)
5.CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING)

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

Result:
Result Proceed to
Ambient Temperature value is above freezing temperature of the HV coolant. A
Ambient Temperature value is below freezing temperature of the HV coolant. B



A

12.REPLACE INVERTER WATER PUMP ASSEMBLY

B

REPLACE HV COOLANT

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>COOLANT (for Inverter)>REPLACEMENT


6.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

7.CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)

NG

CONNECT SECURELY

7.CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)

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

Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WATER PUMP ASSEMBLY)

NG

CONNECT SECURELY

8.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WATER PUMP ASSEMBLY)
a.

Disconnect the A31 hybrid vehicle control ECU assembly connector.


b.

Disconnect the A53 inverter water pump assembly connector.


c.
A556741C03
1.542,2.688 1.896,2.958 0.354,0.271 1.427,0.333 1.823,0.594 0.396,0.26 2.375,2.323 2.073,1.698 true 1.708,4.094 1.823,3.552 true 0.167,0.156 0.479,0.354 0.313,0.198 10 false *a 0.188,2.729 0.5,2.927 0.313,0.198 10 false *b 1.552,4.135 2.104,4.427 0.552,0.292 10 false SWP 2.26,2.365 2.635,2.563 0.375,0.198 10 false IWP 1.51,0.375 2.063,0.667 0.552,0.292 10 false A31 1.583,2.729 2.135,3.021 0.552,0.292 10 false A53
*a Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly)
*b Front view of wire harness connector
(to Inverter Water Pump Assembly)


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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
A31-31 (IWP) - A53-3 (SWP) Power switch off Below 1 Ω


Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
A31-31 (IWP) or A53-3 (SWP) - Body ground and other terminals Power switch off 10 kΩ or higher


HINT:

Check the condition (looseness, deterioration, etc.) of the wire to body ground for the inverter water pump assembly.



d.

Reconnect the A53 inverter water pump assembly connector.


e.

Reconnect the A31 hybrid vehicle control ECU assembly connector.


Result:
Proceed to
OK
NG



OK

9.READ VALUE USING GTS (INVERTER WATER PUMP REVOLUTION)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.READ VALUE USING GTS (INVERTER WATER PUMP REVOLUTION)
NOTICE:

Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.


HINT:

When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.


a.

Connect the GTS to the DLC3.


b.
C531440C01
1.177,1.208 0.635,1.417 true 0.156,0.135 0.469,0.333 0.313,0.198 10 false *1 0.448,1.333 0.76,1.531 0.313,0.198 10 false *2
*1 No. 1 Engine Room Relay Block and Junction Block Assembly
*2 INV W/PMP NO. 2 Fuse


Remove the INV W/PMP NO. 2 fuse from No. 1 engine room relay block and junction block assembly.


c.

Turn the power switch on (IG).


d.

Enter the following menus: Powertrain / Hybrid Control / Data List / Inverter Water Pump Revolution.

Powertrain > Hybrid Control > Data List
Tester Display
Inverter Water Pump Revolution
50003 397 60

e.

According to the display on the GTS, read the Data List.

OK:
Tester Display Condition Specified Condition
Inverter Water Pump Revolution Power switch on (IG) 200 rpm or less



f.

Turn the power switch off.


g.

Install the INV W/PMP NO. 2 fuse.


Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WATER PUMP ASSEMBLY)

NG

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

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


10.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WATER PUMP ASSEMBLY)
a.

Disconnect the A31 hybrid vehicle control ECU assembly connector.


b.
C408963C01
0.146,0.115 0.458,0.313 0.313,0.198 10 false *1 2.563,2.135 2.875,2.333 0.313,0.198 10 false *2
*1 No. 1 Engine Room Relay Block and Junction Block Assembly
*2 INV W/P Relay Holder


Remove the INV W/P relay from No. 1 engine room relay block and junction block assembly.


c.

Connect terminals 3 and 5 of the INV W/P relay holder.

HINT:

Make a short circuit between terminals 3 and 5 to supply +B voltage to the inverter water pump.



d.

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

A458551C82
4.771,0.042 5.208,0.281 0.438,0.24 1.104,2.479 1.542,2.771 0.438,0.292 3.156,3.281 3,2.854 true 5.927,2.104 5.573,1.063 true 0.375,2.135 0.688,2.333 0.313,0.198 10 false *b 0.156,0.104 0.469,0.302 0.313,0.198 10 false *a 4.854,0.073 5.229,0.271 0.375,0.198 10 false A30 1.198,2.542 1.51,2.74 0.313,0.198 10 false A31 3.208,3.344 3.667,3.542 0.458,0.198 10 false IWP 5.948,2.146 6.406,2.344 0.458,0.198 10 false E1
*a Component with harness connected
(Hybrid Vehicle Control ECU Assembly) 		*b Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly)


Standard Voltage:
Tester Connection Condition Specified Condition
A31-31 (IWP) - A30-15 (E1) INV W/P relay holder terminals 3 and 5 connected
Power switch off 		11 to 14 V


NOTICE:

Make sure to check for and clear DTCs after performing this inspection.



e.

Install the INV W/P relay.


f.

Reconnect the A31 hybrid vehicle control ECU assembly connector.


Result:
Proceed to
OK
NG



OK

11.CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM)

NG

12.REPLACE INVERTER WATER PUMP ASSEMBLY
11.CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM)
a.

Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the table below.


b.

Turn the power switch on (IG).


c.

Check the waveform while turning the power switch on (IG).

A494164C78
4.708,0.271 5.188,0.552 0.479,0.281 2.49,0.271 2.969,0.552 0.479,0.281 2.042,2.417 2.521,1.51 true 5.958,2.438 5.552,1.396 true 0.271,0.167 0.583,0.323 0.313,0.156 10 false *a 2.615,0.354 2.927,0.51 0.313,0.156 10 false A31 5.99,2.427 6.302,2.583 0.313,0.156 10 false E1 4.844,0.344 5.156,0.5 0.313,0.156 10 false A30 1.813,2.438 2.125,2.594 0.313,0.156 10 false IWP
*a Component with harness connected
(Hybrid Vehicle Control ECU Assembly) 		- -


Item Content
Terminal A31-31 (IWP) - A30-15 (E1)
Equipment Setting 5 V/DIV., 50 ms./DIV.
Condition Power switch on (IG)

OK:

Waveform duty ratio is between 3% and 9%.



d.

Turn the power switch off.


Result:
Proceed to
OK
NG



OK

12.REPLACE INVERTER WATER PUMP ASSEMBLY

NG

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

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


12.REPLACE INVERTER WATER PUMP ASSEMBLY

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>WATER PUMP WITH MOTOR>REMOVAL

Result:
Proceed to
NEXT



NEXT

13.ADD HV COOLANT AND PERFORM AIR BLEEDING
13.ADD HV COOLANT AND PERFORM AIR BLEEDING
a.

After replacing the inverter water pump assembly, add HV coolant and perform air bleeding.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>COOLANT (for Inverter)>REPLACEMENT


Result:
Proceed to
NEXT



NEXT

END