RM35X0E _52 Drivetrain _078741 AC60E AUTOMATIC TRANSMISSION / TRANSAXLE _0385245 AUTOMATIC TRANSMISSION SYSTEM(for 7GR-FKS) C

AC60E AUTOMATIC TRANSMISSION / TRANSAXLE  AUTOMATIC TRANSMISSION SYSTEM(for 7GR-FKS)  P056014  System Voltage Circuit Short to Ground or Open  


DESCRIPTION

The battery supplies power 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 ECM data 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 the DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P056014 System Voltage Circuit Short to Ground or Open Open or short in ECM back-up power source circuit for 3 seconds or more (1 trip detection logic).
·

Back-up power source circuit

·

Battery terminals

·

Battery

·

ECM


Comes on DTC stored SAE Code:
P0562

HINT:

If DTC P056014 is stored, the ECM does not store other DTCs.


CONFIRMATION DRIVING PATTERN

HINT:

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.


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 at least 30 seconds.

5.

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

6.

Wait for 3 seconds or more with the ignition switch ON.

7.

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

8.

Input the DTC: P056014.

9.

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


N/A
·

Unable to perform DTC judgment

·

Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit



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 or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.




WIRING DIAGRAM

C335877E03
1.604,1.719 2.677,1.917 1.073,0.198 10 false Battery 1.76,0.813 3.313,1.667 1.552,0.854 10 false Fusible Link Block Assembly (Main Battery) 3.479,0.813 4.552,1.01 1.073,0.198 10 false EFI-MAIN 5.427,0.635 6.5,0.833 1.073,0.198 10 false BATT 5.427,1.24 6.5,1.438 1.073,0.198 10 false E1 5.646,2.156 6.104,2.354 0.458,0.198 10 false ECM 5.104,0.635 5.563,0.833 0.458,0.198 10 false A1 5.083,1.229 5.542,1.427 0.458,0.198 10 false E3 5.135,0.458 5.292,0.656 0.156,0.198 10 false 2 5.135,1.063 5.448,1.26 0.313,0.198 10 false 1

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

Perform registration and/or initialization when parts related to the automatic transmission are replaced.

Click hereDrivetrain>AC60E (AUTOMATIC TRANSMISSION / TRANSAXLE)>AUTOMATIC TRANSMISSION SYSTEM (for 7GR-FKS)>PRECAUTION



PROCEDURE

1.INSPECT BATTERY
a.

Inspect that the battery is not depleted.

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

OK:

Battery is not depleted.



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 TERMINAL VOLTAGE (POWER SOURCE OF ECM)

NG

REPAIR OR REPLACE BATTERY TERMINAL

3.CHECK TERMINAL VOLTAGE (POWER SOURCE OF ECM)
a.
C318004C02
2.656,0.25 3.073,0.479 0.417,0.229 2.156,2.677 3.063,1.792 true 0.104,0.104 0.417,0.302 0.313,0.198 10 false *a 1.865,2.74 3.094,2.938 1.229,0.198 10 false 2 (BATT) 2.792,0.281 3.104,0.479 0.313,0.198 10 false A1
*a Rear view of wire harness connector
(to ECM)


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



Result:
Proceed to
OK
NG



OK

4.CHECK WHETHER DTC OUTPUT RECURS (DTC P056014)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ECM)

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

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

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


e.

Clear the DTCs.

Powertrain > Transmission > Clear DTCs
50002 373

f.

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


g.

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


h.

Wait 5 seconds or more.


i.

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

Powertrain > Transmission > Trouble Codes
50001 373

j.

Read the DTCs using the GTS.


Result:
Result Proceed to
DTC P056014 is output A
DTCs are not output B



A

REPLACE ECM

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


B

CHECK FOR INTERMITTENT PROBLEMS

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING