Dtc P2769 Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve Dsl)

Drivetrain. Corolla. Zre142 Aze141
U250E Automatic Transmission Transaxle. Corolla. Zre142 Aze141

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT TRANSMISSION WIRE (DSL)

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

INSPECT SHIFT SOLENOID VALVE DSL

DTC P2769 Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve DSL)

DTC P2770 Torque Converter Clutch Solenoid Circuit High (Shift Solenoid Valve DSL)


DESCRIPTION

The shift solenoid valve DSL is turned "ON" and "OFF" by signals from the ECM in order to control the hydraulic pressure operation, the lock-up relay valve, which then controls operation of the lock-up clutch.

DTC No.
DTC Detection Condition
Trouble Area
P2769
ECM detects short in solenoid valve DSL circuit (0.1 sec.) when solenoid valve DSL is operated (2-trip detection logic)
  1. Short in shift solenoid valve DSL circuit
  2. Shift solenoid valve DSL
  3. ECM
P2770
ECM detects open in solenoid valve DSL circuit (0.1 sec.) when solenoid valve DSL is not operated (2-trip detection logic)
  1. Open in shift solenoid valve DSL circuit
  2. Shift solenoid valve DSL
  3. ECM

MONITOR DESCRIPTION

Torque converter lock-up is controlled by the ECM based on engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and shift range selection. The ECM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to counter gear rpm (NC). When conditions are appropriate, the ECM requests "lock-up" by applying control voltage to the shift solenoid DSL. When the DSL is opened, it applies pressure to the lock-up relay valve and locks the torque converter assembly. If the ECM detects an open or short in the DSL solenoid circuit, the ECM interprets this as a fault in the DSL solenoid or circuit. The ECM will turn on the MIL and store the DTC.

MONITOR STRATEGY


Related DTCs
P2769: Shift solenoid valve DSL/Range check (Low resistance)
P2770: Shift solenoid valve DSL/Range check (High resistance)
Required sensors/Components
Shift solenoid valve DSL
Frequency of operation
Continuous
Duration
0.064 sec. or more
MIL operation
2 driving cycles
Sequence of operation
None

TYPICAL ENABLING CONDITIONS


P2769: Range check (Low resistance):
The monitor will run whenever this DTC is not present.
None
Shift solenoid valve DSL
ON
Time after solenoid OFF to ON
0.008 seconds or more
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF
Solenoid current cut status
Not cut

P2770: Range check (High resistance):
The monitor will run whenever this DTC is not present.
None
Shift solenoid valve DSL
OFF
Time after solenoid ON to OFF
0.008 seconds or more
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF

TYPICAL MALFUNCTION THRESHOLDS


P2769: Range check (Low resistance):
Solenoid terminal voltage level
Low

P2770: Range check (High resistance):
Solenoid terminal voltage level
High

COMPONENT OPERATING RANGE


Shift solenoid valve DSL
Resistance: 11 to 13 Ω at 20°C (68°F)

WIRING DIAGRAM


Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System. Dtc P2769 Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve Dsl)


INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs (COROLLA_ZRE142 RM000000W770S6X.html).
1.INSPECT TRANSMISSION WIRE (DSL)


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System. Dtc P2769 Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve Dsl)

  1. Disconnect the transmission wire connector from the transaxle.

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

    Standard resistance:
    Tester Connection
    		 Condition
    		Specified Condition
    10 (DSL) - Body ground
    		20°C (68°F)
    		11 to 13 Ω


NG
Go to step 3
OK


2.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System. Dtc P2769 Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve Dsl)

  1. Connect the transmission wire connector.

  1. Disconnect the ECM connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B31-79 (DSL) - Body ground
    		20°C (68°F)
    		11 to 13 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (COROLLA_ZRE142 RM000002WT506MX.html)

3.INSPECT SHIFT SOLENOID VALVE DSL


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System. Dtc P2769 Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve Dsl)

  1. Remove the shift solenoid valve DSL.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Solenoid Connector (DSL) - Solenoid Body (DSL)
    		20°C (68°F)
    		11 to 13 Ω

  1. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

    OK:
    The solenoid valve makes an operating sound.


NG
REPLACE SHIFT SOLENOID VALVE DSL (COROLLA_ZRE142 RM00000109S01BX.html)
OK

REPAIR OR REPLACE TRANSMISSION WIRE (COROLLA_ZRE142 RM000000YWZ01QX.html)