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

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P056014  System Voltage (BATT) Circuit Short to Ground or Open  


DESCRIPTION

Auxiliary battery power is supplied to the BATT terminal of the hybrid vehicle control ECU assembly in order to store DTCs and freeze frame data. Even if the power switch is turned off, back-up power is supplied.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P056014 System Voltage (BATT) Circuit Short to Ground or Open Malfunction in the hybrid vehicle control ECU assembly back-up power source circuit
(1 trip detection logic)
·

Wire harness or connector

·

Hybrid vehicle control ECU assembly

·

Fuse


Comes on Master Warning:
Comes on 		SAE Code:
P0562

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 5 seconds 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.


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

A377656E32
5.146,2.99 6.854,3.333 1.708,0.344 10 false Hybrid Vehicle Control ECU Assembly 5.698,1.146 6.313,1.344 0.615,0.198 10 false BATT 5.698,1.729 6.313,1.927 0.615,0.198 10 false E1 5.146,2.833 5.76,3.031 0.615,0.198 10 false A30 3.594,1.313 4.469,1.583 0.875,0.271 10 false ECU-B NO. 2 1.99,1.302 3.281,1.646 1.292,0.344 10 false INP STD_NO. 1-3 1.167,1.302 1.573,1.51 0.406,0.208 10 false MAIN 0.979,2.208 2.375,2.698 1.396,0.49 10 false Auxiliary Battery 3.656,1 3.896,1.208 0.24,0.208 10 false 1 2.292,1 2.531,1.208 0.24,0.208 10 false 1 2.667,1 2.906,1.208 0.24,0.208 10 false 2 4.021,1 4.26,1.208 0.24,0.208 10 false 2 5.396,1.625 5.635,1.833 0.24,0.208 10 false 15 5.406,1.01 5.75,1.302 0.344,0.292 10 false 13

PROCEDURE

1.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)
a.
A572936

Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE

OK:

The connectors are connected securely and there are no contact pressure problems.



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE OF HYBRID VEHICLE CONTROL ECU ASSEMBLY)

NG

CONNECT SECURELY

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE OF HYBRID VEHICLE CONTROL ECU ASSEMBLY)
a.

Turn the power switch off.


b.

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

A493797C88
4.583,0.26 5.021,0.563 0.438,0.302 5.563,1.396 5.802,2.344 true 4.01,1.292 3.76,2.323 true 0.646,0.417 0.958,0.615 0.313,0.198 10 false *a 4.667,0.323 5.125,0.521 0.458,0.198 10 false A30 5.771,2.396 6.26,2.646 0.49,0.25 10 false E1 3.583,2.406 4.198,2.604 0.615,0.198 10 false BATT
*a Component with harness connected
(Hybrid Vehicle Control ECU Assembly) 		- -


Standard Voltage:
Tester Connection Condition Specified Condition
A30-13 (BATT) - A30-15 (E1) Power switch off 11 to 14 V



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

3.CHECK FUSE (ECU-B NO. 2)
3.CHECK FUSE (ECU-B NO. 2)
a.
A572937C01
1.979,1.49 2.177,0.917 true 0.125,0.125 0.438,0.323 0.313,0.198 10 false *1 2.208,0.813 2.521,1.01 0.313,0.198 10 false *2
*1 Power Destribution Box Assembly
*2 ECU-B NO. 2 Fuse


Remove the ECU-B NO. 2 fuse from the power destribution box assembly.


b.

Check if there is an open circuit in the ECU-B NO. 2 fuse in the power destribution box assembly.

OK:

There is no open circuit in the ECU-B NO. 2 fuse.



c.

Install the ECU-B NO. 2 fuse.


Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (ECU-B NO. 2 FUSE - AUXILIARY BATTERY TERMINAL)

NG

REPLACE FUSE (ECU-B NO. 2)

4.CHECK HARNESS AND CONNECTOR (ECU-B NO. 2 FUSE - AUXILIARY BATTERY TERMINAL)
a.
A572938C01
1.344,0.781 1.656,0.979 0.313,0.198 10 false *2 0.083,0.073 0.396,0.271 0.313,0.198 10 false *1
*1 Power Destribution Box Assembly
*2 ECU-B NO. 2 Fuse Terminal


Remove the ECU-B NO. 2 fuse from the power destribution box assembly.


b.

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


c.

Disconnect the cable from the positive (+) auxiliary battery terminal.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (ECU-B NO. 2 fuse terminal) - Auxiliary battery positive (+) cable Power switch off Below 1 Ω
1 (ECU-B NO. 2 fuse terminal) - Body ground Power switch off 10 kΩ or higher



e.

Connect the cable to the positive (+) auxiliary battery terminal.


f.

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


g.

Install the ECU-B NO. 2 fuse.


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (ECU-B NO. 2 FUSE - HYBRID VEHICLE CONTROL ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (ECU-B NO. 2 FUSE - HYBRID VEHICLE CONTROL ECU ASSEMBLY)
a.

Remove the ECU-B NO. 2 fuse from the power destribution box assembly.


b.

Disconnect the A30 hybrid vehicle control ECU assembly connector.


c.

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

A572939C01
4.844,0.281 5.25,0.552 0.406,0.271 6.135,1.781 5.896,1.313 true 0.406,0.354 0.719,0.552 0.313,0.198 10 false *1 1.646,0.417 1.958,0.615 0.313,0.198 10 false *2 3.75,0.396 4.063,0.594 0.313,0.198 10 false *a 6.01,1.875 6.49,2.125 0.479,0.25 10 false BATT 4.917,0.344 5.229,0.542 0.313,0.198 10 false A30
*1 Power Destribution Box Assembly *2 ECU-B NO. 2 Fuse Terminal
*a Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly) 		- -


Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
2 (ECU-B NO. 2 fuse terminal) - A30-13 (BATT) Power switch off Below 1 Ω


Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
2 (ECU-B NO. 2 fuse terminal) or A30-13 (BATT) - Body ground and other terminals Power switch off 10 kΩ or higher



d.

Reconnect the A30 hybrid vehicle control ECU assembly connector.


e.

Reinstall the ECU-B NO. 2 fuse.


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

REPAIR OR REPLACE HARNESS OR CONNECTOR