RM35X0E _51 Engine / Hybrid System _078720 7GR-FKS ENGINE CONTROL _0381907 SFI SYSTEM C

7GR-FKS ENGINE CONTROL  SFI SYSTEM  P056014  System Voltage Circuit Short to Ground or Open  


MONITOR DESCRIPTION

The battery supplies electricity to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, Freeze Frame Data and fuel trim values. If the battery voltage falls below a minimum level, the memory is cleared and the ECM determines that there is a malfunction in the power supply circuit. The next time the engine is started, the ECM will illuminate the MIL and store this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P056014 System Voltage Circuit Short to Ground or Open An open or short in the ECM backup power source circuit (1 trip detection logic).
·

Open or short in back up power source circuit

·

Battery

·

Battery terminals

·

ECM


Comes on DTC stored SAE Code: P0562

MONITOR STRATEGY

Required Sensors/Components ECM
Frequency of Operation Continuous

TYPICAL MALFUNCTION THRESHOLDS

Both of the following conditions are met -
Battery voltage (BATT) Less than 3.5 V
Electronic throttle actuator power supply voltage (+BM) Less than 3.5 V

CONFIRMATION DRIVING PATTERN

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON.

3.

Turn the GTS on.

4.

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

5.

Turn the ignition switch off and wait for at least 30 seconds.

6.

Turn the ignition switch to ON.

7.

Turn the GTS on.

8.

Wait 5 seconds or more.

9.

Enter the following menus: Powertrain / Engine / Trouble Codes.

10.

Read the pending DTCs.

HINT:
·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.



11.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

12.

Input the DTC: P056014.

13.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions



HINT:
·

If the judgment result is NORMAL, the system is normal.

·

If the judgment result is ABNORMAL, the system is malfunctioning.




WIRING DIAGRAM

A439409E03
0.844,2.667 1.917,2.865 1.073,0.198 10 false Battery 2.49,1.115 3.375,1.365 0.885,0.25 10 false EFI-MAIN 2.615,1.823 3.229,2.021 0.615,0.198 10 false ETCS 5.01,0.781 5.427,0.979 0.417,0.198 10 false 2 5,1.479 5.156,1.677 0.156,0.198 10 false 6 5,2.177 5.313,2.375 0.313,0.198 10 false 1 4.958,1.677 5.417,1.875 0.458,0.198 10 false E4 4.958,0.969 5.417,1.167 0.458,0.198 10 false A1 4.958,2.375 5.417,2.573 0.458,0.198 10 false E3 5.281,0.854 5.896,1.052 0.615,0.198 10 false BATT 5.281,1.552 5.74,1.75 0.458,0.198 10 false +BM 5.292,2.344 5.604,2.542 0.313,0.198 10 false E1 5.885,2.99 6.344,3.188 0.458,0.198 10 false ECM 0.729,2.083 1.615,2.333 0.885,0.25 10 false FL MAIN

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

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

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

·

When disconnecting and reconnecting the battery.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

HINT:

When disconnecting and reconnecting the 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




HINT:

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.


PROCEDURE

1.INSPECT BATTERY
a.

Inspect the battery.

Click herePower Source / Network>7GR-FKS (BATTERY / CHARGING)>CHARGING SYSTEM>ON-VEHICLE INSPECTION

OK:

Battery voltage is between 11 and 14 V.



Result:
Proceed to
OK
NG



OK

2.CHECK BATTERY TERMINAL

NG

CHARGE OR REPLACE BATTERY

2.CHECK BATTERY TERMINAL
a.

Check that the battery terminals are not loose or corroded.

OK:

Battery terminals are not loose or corroded



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE OF ECM)

NG

REPAIR OR REPLACE BATTERY TERMINAL

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE OF ECM)
A216080C11
2.708,0.875 3.198,1.167 0.49,0.292 1.74,0.875 2.229,1.167 0.49,0.292 3.156,1.573 3.052,2.229 true 1.854,1.583 2,2.302 true 0.167,0.042 0.365,0.229 0.198,0.188 10 false *a 2.875,0.948 3.229,1.156 0.354,0.208 10 false A1 2.896,2.313 3.365,2.542 0.469,0.229 10 false BATT 1.833,2.323 2.302,2.552 0.469,0.229 10 false +BM 1.875,0.948 2.229,1.156 0.354,0.208 10 false E4
*a Front view of wire harness connector
(to ECM)


a.

Disconnect the ECM connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A1-2 (BATT) - Body ground Always 11 to 14 V
E4-6 (+BM) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ECM)

4.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTC.

Powertrain > Engine > Clear DTCs
50002 372

e.

Turn the ignition switch off and wait for at least 30 seconds.


Result:
Proceed to
NEXT



NEXT

5.CHECK WHETHER DTC OUTPUT RECURS (DTC P056014)
5.CHECK WHETHER DTC OUTPUT RECURS (DTC P056014)
a.

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.


b.

Enter the following menus: Powertrain / Engine / Trouble Codes.


c.

Read the DTCs.

Powertrain > Engine > Trouble Codes
50001 372
Result:
Result Proceed to
DTCs are not output A
DTC P056014 is output B




A

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


B

REPLACE ECM

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL