Toyota CH-R Service Manual: Torque Converter Clutch Solenoid Circuit Low (P2769,P2770)

Toyota CH-R Service Manual / K114 Cvt / Continuously Variable Transaxle System / Torque Converter Clutch Solenoid Circuit Low (P2769,P2770)

DESCRIPTION

Based on the signal received by the shift solenoid valve SL, the ECM uses the shift solenoid valve SLU to control the lock-up clutch pressure.

If there is an open or short in the shift solenoid valve SL circuit, the ECM stops sending current to the defective shift solenoid valve.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P2769

Torque Converter Clutch Solenoid Circuit Low

While the lock-up is operating, a short is detected in the shift solenoid valve SL circuit 1 time or more consecutively (1 trip detection logic).

  • Wire harness or connector
  • Continuously variable transaxle assembly (Shift solenoid valve SL)
  • ECM

Comes on

DTC stored

P2770

Torque Converter Clutch Solenoid Circuit High

While the lock-up is operating, an open is detected in the shift solenoid valve SL circuit 1 time or more consecutively (1 trip detection logic).

  • Wire harness or connector
  • Continuously variable transaxle assembly (Shift solenoid valve SL)
  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve SL circuit. If there is an open or short in the shift solenoid valve SL circuit, the ECM detects the malfunction, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P2769: Torque Converter Clutch Solenoid (Shift solenoid valve SL) / Range check

P2770: Torque Converter Clutch Solenoid (Shift solenoid valve SL) / Range check

Required sensors/Components

Continuously variable transaxle assembly

Torque Converter Clutch Solenoid (Shift solenoid valve SL)

Frequency of operation

Continuous

Duration Conditions

1 times

MIL operation

Immediately

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

Battery voltage

8 V or more

Time after Battery voltage 8 V or more

0.5 seconds or more

Write Inhibit

permit

Time after Write status forbiddance to permit

0.5 seconds or more

Ignition switch

ON

Time after Ignition switch OFF to ON

0.5 seconds or more

Starter

OFF

Time after Starter ON to OFF

0.5 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

P2769:

All of the following conditions are met:

4 times or more

Command to solenoid

ON

Time after command to solenoid OFF to ON

0.008 seconds or more

Solenoid terminal voltage level (Shift solenoid valve SL)

Low

P2770:

All of the following conditions are met:

4 times or more

Command to solenoid

OFF

Time after command to solenoid OFF to ON

0.008 seconds or more

Solenoid terminal voltage level (Shift solenoid valve SL)

High

COMPONENT OPERATING RANGE

Shift solenoid valve SL

Resistance: 11 to 15 Ω at 20°C (68°F)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Perform initialization after replacing any parts related to the continuously variable transaxle system.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

  • Perform the universal trip to clear permanent DTCs.

    Click here

HINT:

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Drive the vehicle and confirm the lock-up on and off conditions according to Road Test.

    Click here

  2. Check for DTCs again.

    Click here

PROCEDURE

1.

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)

(a) Disconnect the C40 transmission wire connector.

*a

Component without harness connected

(Transmission Wire)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

12 (SL) - Body ground

20°C (68°F)

11 to 15 Ω

NG

GO TO STEP 4

OK

2.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the ECM connector.

*a

Front view of wire harness connector

(to ECM)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C63-67 (SL) - Body ground

20°C (68°F)

11 to 15 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)

OK

3.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM INITIALIZATION

4.

REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

(a) Replace the continuously variable transaxle assembly.

  • When Not Using the Engine Support Bridge

    Click here

  • When Using the Engine Support Bridge

    Click here

NEXT

PERFORM INITIALIZATION

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