RM3660EC _52 Drivetrain _080728 K313 CVT _0392261 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM C

K313 CVT  CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM  P056014  System Voltage Circuit Short to Ground or Open  


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 ECM back-up power source circuit voltage is low for 3 seconds or more (1-trip detection logic).
·

Open or short in back up power source circuit

·

Battery

·

Battery terminals

·

ECM


Comes on DTC stored SAE Code:
P0562

HINT:

If DTC P056014 is stored, the ECM will not store other DTCs or the data stored in the ECM will be partially cleared.


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.

·

When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE 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.

Wait for 3 seconds or more with the ignition switch ON. [*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 / 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 normal judgment procedure again.




WIRING DIAGRAM

C323652E27
1.573,1.719 2.646,1.917 1.073,0.198 10 false Battery 2.094,0.802 3.167,1 1.073,0.198 10 false BATT-MAIN 3.448,0.792 4.74,1.031 1.292,0.24 10 false EFI NO. 1 5.635,2.135 6.188,2.5 0.552,0.365 10 false ECM 5.427,0.656 6.5,0.854 1.073,0.198 10 false BATT 5.427,1.24 6.5,1.438 1.073,0.198 10 false E1 5.073,0.646 6.146,0.844 1.073,0.198 10 false A46 5.073,1.24 6.146,1.438 1.073,0.198 10 false C78 5.146,0.479 5.302,0.677 0.156,0.198 10 false 1 5.115,1.073 5.427,1.375 0.313,0.302 10 false 53

CAUTION / NOTICE / HINT

NOTICE:
·

Perform the universal trip to clear permanent DTCs.

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR

·

Perform initialization when parts related to the continuously variable transaxle system are replaced.

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>INITIALIZATION

·

Check that no DTCs are stored after performing initialization.

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR

·

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

·

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INITIALIZATION



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>NR Series (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)
a.

Disconnect the A46 ECM connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A46-1 (BATT) - Body ground Always 11 to 14 V



c.

Connect the A46 ECM connector.


Result:
Proceed to
OK
NG



OK

4.CHECK FOR DTC (DTC P056014)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ECM)

4.CHECK FOR DTC (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.


h.

Turn the GTS on.


i.

Wait for 3 seconds or more.


j.

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


k.

Read the DTCs.

Powertrain > Transmission > Trouble Codes
50001 373
Result:
Result Proceed to
DTC P056014 is output A
DTCs are not output B




A

5.REPLACE ECM

B

CHECK FOR INTERMITTENT PROBLEMS

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>CHECK FOR INTERMITTENT PROBLEMS