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DI-1097
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
DIDVS-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-1098
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
The monitor will run whenever these
See page DI-973
DTCs are not present
Case 1:
Battery voltage 12 V or more -
Ignition switch ON
Starter OFF
Case 2:
Battery voltage 10 V or more Less than 12 V
CPU commanded duty - Less than 75%
Ignition switch ON
Starter OFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteria Threshold
Case 1:
Output signal duty 100%
Case 2:
Output signal duty 100%
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
DI-1099
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-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-1100
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-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-66).
DI-1101
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-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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