RM38T0EC _51 Engine / Hybrid System _144957 HYBRID / BATTERY CONTROL _0604232 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 in order to store DTCs and freeze frame data. Even if the ignition 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 back-up power source circuit
(1 trip detection logic)
·

Wire harness or connector

·

Hybrid vehicle control ECU

·

Fuse


Comes on Master Warning:
Comes on 		SAE Code:
P0562

MONITOR DESCRIPTION

If a period of time has elapsed with a low voltage at the BATT terminal of the hybrid vehicle control ECU, the hybrid vehicle control ECU will determine that a malfunction has occurred in the back-up power supply system, and it will store a DTC. The MIL will illuminate the next time the ignition switch ON.

MONITOR STRATEGY

Related DTCs P0562 (INF P056014): System voltage range check (Low voltage)
Required sensors/components Main: Back-up power source circuit
Sub: Hybrid vehicle control ECU
Frequency of operation Continuous
Duration TMC's intellectual property
MIL operation Immediately
Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored TMC's intellectual property
Other conditions belong to TMC's intellectual property -

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property -

COMPONENT OPERATING RANGE

Auxiliary battery voltage Between 9 and 14 V

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 ignition switch to ON and turn the GTS on.

3.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4.

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

5.

Turn the ignition switch to ON and turn the GTS on.

6.

With ignition switch ON 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

A500392E08
5.146,2.99 7.052,3.438 1.906,0.448 10 false Hybrid Vehicle Control ECU 5.698,1.146 6.313,1.344 0.615,0.198 10 false BATT 5.698,2.208 6.313,2.406 0.615,0.198 10 false E1 5.146,2.833 5.76,3.031 0.615,0.198 10 false I278 3.521,1.313 4.396,1.583 0.875,0.271 10 false ECU-B NO. 2 1.729,1.302 2.771,1.635 1.042,0.333 10 false INP STD NO. 3 0.042,2.344 1.438,2.531 1.396,0.188 10 false from Auxiliary Battery 5.49,2.104 5.729,2.313 0.24,0.208 10 false 1 5.406,1.01 5.75,1.302 0.344,0.292 10 false 13

CAUTION / NOTICE / HINT

NOTICE:
·

Be sure to check that the applicable DTC is output from the hybrid control system.

·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the auxiliary battery

HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART




PROCEDURE

1.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)
a.
A517671

Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU 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)

NG

CONNECT SECURELY

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

Turn the ignition switch off.


b.

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

A502139C73
4.688,0.26 5.125,0.542 0.438,0.281 3.667,2.365 4.01,1.292 true 5.896,2.365 5.781,1.271 true 0.25,0.167 0.563,0.323 0.313,0.156 10 false *a 5.833,2.385 6.146,2.583 0.313,0.198 10 false E1 3.479,2.385 3.927,2.656 0.448,0.271 10 false BATT 4.781,0.302 5.115,0.552 0.333,0.25 10 false I278
*a Component with harness connected
(Hybrid Vehicle Control ECU) 		- -


Standard Voltage:
Tester Connection Condition Specified Condition
I278-13 (BATT) - I278-1 (E1) Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE HYBRID VEHICLE CONTROL ECU

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.

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


b.

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

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE OF HYBRID VEHICLE CONTROL ECU)

NG

REPLACE FUSE (ECU-B NO. 2)