Toyota CH-R Service Manual: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (P2759)

Toyota CH-R Service Manual / K114 Cvt / Continuously Variable Transaxle System / Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (P2759)

DESCRIPTION

The ECM uses the shift solenoid valve SLU to perform forward and reverse clutch control or lock-up clutch control.

*1	Spool Valve	*2	Sleeve
*3	Solenoid Coil	-	-
*a	Hydraulic Pressure	*b	Current Flow to Solenoid

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P2759	Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical	While the vehicle is driven, there is an open or short in the shift solenoid valve SLU circuit for 1 second or more (1 trip detection logic).	Wire harness or connector Continuously variable transaxle assembly (Shift solenoid valve SLU) ECM	Comes on	DTC stored

MONITOR DESCRIPTION

This DTC indicates an open or short in the shift solenoid valve SLU circuit. If there is an open or short in the shift solenoid valve SLU circuit, the ECM detects the malfunction, illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	P2759: Torque Converter Clutch Pressure Control Solenoid (Shift solenoid valve SLU) / Range check
Required sensors/Components	Continuously variable transaxle assembly (Shift solenoid valve SLU)
Frequency of operation	Continuous
Duration Conditions	1 second
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

All

Solenoid current cut status	Not cut
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

Condition (A):

One of the following conditions is met:	-
a. Battery voltage	12 V or more
b. All of the following conditions are met:	-
Battery voltage	10 V or more and less than 12 V
Target current	Less than 0.75 A

Condition (B):

Target current

0.25 A or more

TYPICAL MALFUNCTION THRESHOLDS

Condition (A):

Output duty cycle

100% or more

Condition (B):

Output duty cycle

0% or less

COMPONENT OPERATING RANGE

Output duty cycle

More than 0% and less than 100%

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.
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Perform the universal trip to clear permanent DTCs.
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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 SLU)

(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
4 (SLU+) - 11 (SLU-)	20°C (68°F)	5.0 to 5.6 Ω
4 (SLU+) - Body ground and other terminals	Always	10 kΩ or higher
11 (SLU-) - Body ground and other terminals	Always	10 kΩ or higher

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
C63-43 (SLU+) - C63-42 (SLU-)	20°C (68°F)	5.0 to 5.6 Ω
C63-43 (SLU+) - Body ground and other terminals	Always	10 kΩ or higher
C63-42 (SLU-) - Body ground and other terminals	Always	10 kΩ or higher

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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