P2759

DESCRIPTION

The amount of current flow to the solenoid is controlled by the (*) duty ratio of the ECM output signal. The higher the duty ratio becomes, the higher the lock-up hydraulic pressure becomes during the lock-up operation.

(*) Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of continuity in one cycle, and B is the period of non-continuity, then Duty Ratio = A/(A+B) x 100(%).

DTC No.	DTC Detection Condition	Trouble Area
P2759	Open or short is detected in shift solenoid valve SLU circuit for 1 second or more while driving (1-trip detection logic).	Open or short in shift solenoid valve SLU circuit Shift solenoid valve SLU ECM

Reference (Using an oscilloscope):
Check the waveform between the terminals SLU+ and SLU- of the ECM connector

Standard:

Refer to the illustration.

Terminal	SLU+ - SLU-
Tool setting	5 V/DIV., 1 ms./DIV.
Vehicle condition	5th (lock-up) or 6th (lock-up) gear

MONITOR DESCRIPTION

When an open or short in a shift solenoid valve (SLU) circuit is detected, the ECM determines there is a malfunction. The ECM will turn on the MIL and store this DTC.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. INSPECT TRANSMISSION WIRE (SLU)

1. Disconnect the transmission wire connector from the transmission.

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

   Standard resistance:

   Tester Connection	Specified Condition 20°C (68°F)
   12 (SLU+) - 4 (SLU-)	5.0 to 5.6 Ω

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

   Standard resistance (Check for short):

   Tester Connection	Specified Condition
   12 (SLU+) - Body ground	10 kΩ or higher
   4 (SLU-) - Body ground	↑

NG	Go to step 3

OK

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

1. Connect the transmission wire connector to the transmission.

2. Disconnect the ECM connector.

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

   Standard resistance:

   Tester Connection	Specified Condition 20°C (68°F)
   E4-13 (SLU+) - E4-12 (SLU-)	5.0 to 5.6 Ω

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

   Standard resistance (Check for short):

   Tester Connection	Specified Condition
   E4-13 (SLU+) - Body ground	10 kΩ or higher
   E4-12 (SLU-) - Body ground	↑

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE ECM

3. INSPECT SHIFT SOLENOID VALVE SLU

1. Remove the shift solenoid valve SLU.

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

   Standard resistance:

   Tester Connection	Specified Condition 20°C (68°F)
   1 - 2	5.0 to 5.6 Ω

3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

   OK:

   The solenoid makes an operating sound.
   

NG	REPLACE SHIFT SOLENOID VALVE SLU

OK
REPAIR OR REPLACE TRANSMISSION WIRE