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.

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

GO TO STEP 4

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

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

3.	REPLACE ECM

(a) Replace the ECM.

Click here

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

PERFORM INITIALIZATION

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Pressure Control Solenoid "J" Performance or Stuck Off (P2820)

DESCRIPTION According to current control by the ECM, the shift solenoid valve SLP controls primary pulley pressure in accordance with the requested gear ratio to perform gear ratio changes. ...

Other materials:

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

Pressure Control Solenoid "J" Electrical (Shift Solenoid Valve SLP) (P2822)

Pressure Control Solenoid "J" Performance or Stuck Off (P2820)

Other materials:

Toyota CH-R Owners Manual

Toyota CH-R Service Manual