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

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P0A1B94  Drive Motor "A" Control Module Unexpected Operation  


DTC SUMMARY

MALFUNCTION DESCRIPTION


The hybrid vehicle control ECU assembly monitors the motor generator control ECU (MG ECU).

The cause of this malfunction may be the following:

Motor generator control ECU internal malfunction
·

Motor generator control ECU (MG ECU) malfunction



DESCRIPTION

The hybrid vehicle control ECU assembly monitors the motor generator control ECU (MG ECU) and stores this DTC when it detects a malfunction.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P0A1B94 Drive Motor "A" Control Module Unexpected Operation The motor generator control ECU (MG ECU) value received by the hybrid vehicle control ECU assembly exceeds the threshold for a certain period of time.
(1 trip detection logic)
·

Inverter with converter assembly

·

IGCT relay

·

IGCT fuse


Comes on Master Warning:
Comes on 		SAE Code:
P0A1B

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.

With power switch on (IG) and wait for 2 minutes or more. [*1]

HINT:
·

If the vehicle has returned to normal, it can be driven after turning the power switch on (READY).

·

[*1]: Normal judgment procedure.

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



7.

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

8.

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

A573442E01
5.656,0.521 5.854,0.729 0.198,0.208 10 false 7 5.677,0.979 5.844,1.219 0.167,0.24 10 false 8 5.583,1.375 5.75,1.615 0.167,0.24 10 false 47 5.573,1.75 5.74,1.99 0.167,0.24 10 false 15 5.396,2.052 5.854,2.25 0.458,0.198 10 false A30 5.875,0.396 6.333,0.594 0.458,0.198 10 false +B1 5.854,0.854 6.313,1.052 0.458,0.198 10 false +B2 5.854,1.25 6.469,1.448 0.615,0.198 10 false MREL 5.875,1.635 6.188,1.833 0.313,0.198 10 false E1 5.396,2.188 7.115,2.552 1.719,0.365 10 false Hybrid Vehicle Control ECU Assembly 5.083,3.042 5.875,3.323 0.792,0.281 10 false 12*1, 26*2 5.177,3.479 5.917,3.708 0.74,0.229 10 false 24*1, 9*2 5.531,4.146 6.927,4.521 1.396,0.375 10 false Inverter with Converter Assembly 5.865,3.167 6.479,3.365 0.615,0.198 10 false IGCT 5.885,3.615 6.5,3.813 0.615,0.198 10 false GND1 3.969,0.708 4.125,0.906 0.156,0.198 10 false 2 3.51,1.021 4.281,1.198 0.771,0.177 10 false IGCT NO. 2 2.635,0.979 2.792,1.177 0.156,0.198 10 false 5 2.646,1.365 2.813,1.604 0.167,0.24 10 false 1 1.833,1.375 1.99,1.573 0.156,0.198 10 false 2 1.844,0.979 2,1.177 0.156,0.198 10 false 3 2.104,1.573 2.719,1.771 0.615,0.198 10 false IGCT 0.948,1.917 1.323,2.104 0.375,0.188 10 false IGCT 1.063,2.99 2.135,3.281 1.073,0.292 10 false Auxiliary Battery 5.531,3.99 6.594,4.198 1.063,0.208 10 false A51*1, A87*2 3.667,0.708 3.833,0.948 0.167,0.24 10 false 1 2.115,4.063 3.802,4.26 1.688,0.198 10 false *1: for 2WD 2.115,4.365 4.406,4.563 2.292,0.198 10 false *2: for AWD 0.958,3.927 1.333,4.115 0.375,0.188 10 false XA 1.573,3.927 1.948,4.115 0.375,0.188 10 false XB

PROCEDURE

1.CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)
a.

Check the connection of the negative (-) and positive (+) auxiliary battery terminals.

OK:

The terminals are connected securely and there is no contact problem.


HINT:

If performing a simulation test, turn the power switch on (IG) and shake the wire harnesses vertically and horizontally before checking for DTCs.



Result:
Proceed to
OK
NG



OK

2.CHECK GROUND WIRE CONNECTION CONDITION

NG

6.CONNECT SECURELY
2.CHECK GROUND WIRE CONNECTION CONDITION
a.
C408116

Check the installation condition of the ground wires XA and XB.

OK:

The ground wires XA and XB are securely installed.


HINT:

If performing a simulation test, turn the power switch on (IG) and shake the wire harnesses vertically and horizontally before checking for DTCs.



Result:
Proceed to
OK
NG



OK

3.CHECK FUSE (IGCT)

NG

7.CONNECT SECURELY
3.CHECK FUSE (IGCT)
a.
C408106C01
1.917,2.615 2.552,2.563 true 0.146,0.167 0.458,0.365 0.313,0.198 10 false *1 2.615,2.49 2.927,2.688 0.313,0.198 10 false *2
*1 No. 3 Relay Block and Junction Block Assembly
*2 IGCT Fuse


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


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
IGCT fuse Always Below 1 Ω



c.

Reinstall the IGCT fuse.


Result:
Proceed to
OK
NG



OK

4.CHECK RELAY (IGCT)

NG

8.REPAIR OR REPLACE MALFUNCTIONING PARTS
4.CHECK RELAY (IGCT)
a.

Check the IGCT relay for improper installation.

OK:

The relay is installed securely.


HINT:

If performing a simulation test, turn the power switch on (IG) and gently vibrate the IGCT relay with a finger before checking for DTCs.



b.
C408040C01
0.969,2.521 1.583,2.198 true 0.146,0.167 0.458,0.365 0.313,0.198 10 false *1 0.76,2.469 1.073,2.667 0.313,0.198 10 false *2
*1 No. 3 Relay Block and Junction Block Assembly
*2 IGCT Relay


Remove the IGCT relay from the No. 3 relay block and junction block assembly.


c.
A253297C01
0.146,0.056 0.409,0.261 0.263,0.205 10 *1
*1 IGCT Relay


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

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω



d.

Install the IGCT relay.


Result:
Proceed to
OK
NG



OK

5.CHECK DTC OUTPUT (HYBRID CONTROL)

NG

9.REPAIR OR REPLACE MALFUNCTIONING PARTS
5.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.

HINT:

Check the DTCs that were output when the vehicle was brought to the workshop.


Powertrain > Hybrid Control > Trouble Codes
50001 397
Result:
Result Proceed to
P0A1B94 only is output. A
DTCs except P0A1B94 are output. B



e.

Turn the power switch off.



A

REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS

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


B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

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


6.CONNECT SECURELY
Result:
Proceed to
NEXT



NEXT

10.CLEAR DTC
7.CONNECT SECURELY
Result:
Proceed to
NEXT



NEXT

10.CLEAR DTC
8.REPAIR OR REPLACE MALFUNCTIONING PARTS
Result:
Proceed to
NEXT



NEXT

10.CLEAR DTC
9.REPAIR OR REPLACE MALFUNCTIONING PARTS
Result:
Proceed to
NEXT



NEXT

10.CLEAR DTC
11.SIMULATION TEST
a.

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


b.

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


c.

Turn the power switch off.


Result:
Proceed to
NEXT



NEXT

12.CHECK DTC OUTPUT (HYBRID CONTROL)
12.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
No DTCs are output. A
P0A1B94 only is output. B
DTCs except P0A1B94 are output. C



e.

Turn the power switch off.



A

END

B

REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS

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


C

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

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