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DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1265
2UZ-FE)
DIDX3-01
DTC P2759 Torque Converter Clutch Pressure Control Solenoid
Control Circuit Electrical(Shift Solenoid Valve SLU)
CIRCUIT DESCRIPTION
The amount of current flow to the solenoid is controlled by the
Lock-up (*) duty ratio of the ECM output signal. The higher the duty ratio
Operation becomes, the higher the lock-up hydraulic pressure becomes
Pressure 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
Current flow to solenoid
is the period of non-continuity, then
Duty Ratio = A/(A + B) x 100 (%)
ON
OFF
1 cycle
BE4056 D00160
DTC No. DTC detection condition Trouble Area
S Open or short in shift solenoid valve SLU circuit
Open or short is detected in shift solenoid valve SLU circuit for
P2759 S Shift solenoid valve SLU
1 second or more while driving (1-trip detection logic).
S ECM
MONITOR DESCRIPTION
When an open or short in a shift solenoid valve (SLU) circuit is detected, the ECM determines there is a mal-
function. The ECM will turn on the MIL and store this DTC.
MONITOR STRATEGY
Related DTCs P2759 Shift solenoid valve SLU/Range check
Required sensors/Components Shift solenoid valve SLU
Frequency of operation Continuous
Duration 1 sec.
MIL operation Immediate
Sequence of operation None
DI-1266 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
The monitor will run whenever this DTC is
See page DI-1128
not present.
Solenoid current cut status Not cut
CPU commanded duty 19% or more -
Battery voltage 11 V or more -
Ignition switch ON
Starter OFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteria Threshold
Solenoid status from IC Fail (Open or short)
COMPONENT OPERATING RANGE
Parameter Standard value
Output signal duty Less than 100%
WIRING DIAGRAM
E1 Electronically Controlled
Transmission Solenoid ECM
+B
SLU 15
LG G
E6
SLU+ 13 SLU+
14
BR L-B SLU-
E6
SLU- 5
D14178
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1267
2UZ-FE)
INSPECTION PROCEDURE
1 Inspect transmission wire.
Transmission Wire Side: PREPARATION:
(Connector Front View): Disconnect the transmission wire connector.
SLU- CHECK:
E1 Measure the resistance according to the value(s) in the table
below.
8 7 6 5 4 3 2 1
OK:
15 14 13 12 11 10 9
Specified Condition
Tester Connection
20_C (68_F)
SLU+ D11994
13 (SLU+) - 5 (SLU-) 5.0 to 5.6
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection Specified Condition
13 (SLU+) - Body ground 10 k or higher
5 (SLU-) - Body ground
NG Go to step 3.
OK
DI-1268 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
2 Check harness and connector (Transmission wire - ECM)
ECM: PREPARATION:
E7 E6 E5 E4 E3 (a) Connect the transmission wire connector.
(b) Disconnect the ECM connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Specified Condition
SLU+ SLU- Tester Connection
20_C (68_F)
D14166
E6 - 15 (SLU+) - E6 - 14 (SLU-) 5.0 to 5.6
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection Specified Condition
E6 - 15 (SLU+) - Body ground 10 k or higher
E6 - 14 (SLU-) - Body ground
NG Repair or replace the harness or connector
(See page IN-30).
OK
Replace the ECM (See page SF-82).
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1269
2UZ-FE)
3 Inspect shift solenoid valve SLU.
Shift Solenoid Valve SLU: PREPARATION:
Remove the shift solenoid valve SLU (See page AT-12).
1 2
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Specified Condition
Tester Connection
20_C (68_F)
1-2 5.0 to 5.6
CHECK:
1 2 Connect the positive (+) lead with a 21 W bulb to terminal 2 and
the negative (-) lead to terminal 1 of the solenoid valve connec-
tor, then check the movement of the valve.
OK:
The solenoid makes an operating sound.
(-) (+)
D12795
NG Replace the shift solenoid valve SLU
(See page AT-12).
OK
Repair or replace the transmission wire
(See page AT-9).
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