DTC    C2310    Open or Short Circuit in Battery Circuit

for Preparation Click here


DESCRIPTION

Auxiliary battery voltage is constantly applied to terminal BATT. This voltage is used to power the transmission control ECU assembly memory. The transmission control ECU assembly stores this DTC when it detects a malfunction related to terminal BATT.

HINT:
When there is an open or short in the BATT circuit, information on the actuator position (park (P) selected or a shift state other than park (P) selected) stored in the transmission control ECU assembly is cleared every time the power switch is turned off. Therefore, the ECU works to recognize the position each time the power switch is turned on (IG). As a result, the time from when the power switch is turned on (IG) until "READY" is indicated may become longer than normal.


DTC No.
DTC Detection Condition
Trouble Area
C2310
With the power switch on (IG) (IG circuit malfunction is not detected), voltage of transmission control ECU assembly terminal BATT is 8 V or less for 1 second or more.
  1. P CON MAIN fuse
  2. Transmission control ECU assembly
  3. Wire harness or connector

WIRING DIAGRAM


C212068E05


INSPECTION PROCEDURE

1.INSPECT FUSE (P CON MAIN)

  1. Remove the P CON MAIN fuse from the engine room junction block assembly.



    C234243E01

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P CON MAIN fuse
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Engine Room Junction Block Assembly
    *2
    		P CON MAIN Fuse

  1. Install the P CON MAIN fuse.



NG
REPLACE FUSE (P CON MAIN)
OK


2.READ VALUE USING INTELLIGENT TESTER (BATTERY VOLTAGE VALUE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Enter the following menus: Chassis / Transmission Control / Data List / Battery Voltage Value.

  1. Read the Data List displayed on the intelligent tester.

    Result:
    Tester Display
    		Condition
    		Specified Condition
    Battery Voltage Value
    		Always
    		9 to 14 V

  1. Turn the power switch off.



NG
Go to step 3
OK

REPLACE TRANSMISSION CONTROL ECU ASSEMBLY (Click here)  

3.CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - P CON MAIN FUSE)

  1. Disconnect connector A21 from the transmission control ECU assembly.

  1. Disconnect the P CON MAIN fuse from the engine room junction block assembly.



    C234244E02

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A21-15 (BATT) - 2 (P CON MAIN fuse)
    		Power switch off
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A21-15 (BATT) or 2 (P CON MAIN fuse) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Engine Room Junction Block Assembly
    *a
    		Front view of wire harness connector
    (to Transmission Control ECU Assembly)
    *b
    		P CON MAIN Fuse Connector of Engine Room Junction Block Assembly

    NOTICE:
    Be careful not to break the fuse holder by forcing the tester probes into it during this inspection.

  1. Install the P CON MAIN fuse.

  1. Connect the transmission control ECU assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK AND REPAIR POWER SOURCE CIRCUIT