Toyota Tundra (2015 year). Manual — part 341
OK
1st
2nd
3rd
4th
5th
6th
Actual gear position under malfunction
1st
2nd
3rd
4th
5th
4th
OK:
Gear position changes in accordance with the tester command.
NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY
ASSEMBLY
3.
PERFORM ACTIVE TEST USING TECHSTREAM (SHIFT SOLENOID VALVE SLT)
NOTICE:
Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early
in troubleshooting is one way to save diagnostic time. Data List information can be displayed while
performing Active Tests.
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
SST: 09992-00095
09992-00231
09992-00271
(b) Connect the Techstream to the DLC3.
(c) Start the engine and warm it up.
(d) Measure the line pressure with SST.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test.
(g) According to the display on the Techstream, perform the Active Test.
(h) Measure the line pressure.
Engine and ECT
TESTER
DISPLAY
TEST PART
CONTROL RANGE
DIAGNOSTIC NOTE
Activate the
Solenoid
(SLT)*
Operate the shift
solenoid SLT and
raise line pressure
ON or OFF
HINT:
OFF: Line pressure up (when Active Test
"Activate the Solenoid (SLT)" is performed,
ECM commands SLT solenoid to turn off)
ON: No action (normal operation)
[Vehicle Condition]
Vehicle
stopped
Engine
idling
HINT:
*: Activate the Solenoid (SLT) in the Active Test is performed to check the line pressure changes by
connecting SST to the automatic transmission, which is used in the Hydraulic Test
as well. Please
note that the pressure values in the Active Test and Hydraulic Test are different.
OK:
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
OK
The line pressure changes as specified when performing the Active Test.
Text in Illustration
*1
Test Plug
NG
REPLACE SHIFT SOLENOID VALVE SLT
4.
CLEAR DTC AND PERFORM RUNNING TEST
(a) Clear the DTC
.
(b) Check for the DTC again after conducting the Monitor Drive Pattern
.
OK:
No DTC code output.
NG
REPAIR OR REPLACE AUTOMATIC TRANSMISSION
ASSEMBLY
OK
END
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000W8F0J1X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0748; Pressure Control
Solenoid "A" Electrical (Shift Solenoid Valve SL1); 2015 MY Tundra [08/2014 - ]
DTC
P0748
Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1)
DESCRIPTION
solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated
safely
.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
P0748
The ECM checks for an open or short in the shift solenoid valve SL1
circuit while driving and shifting between 4th and 5th gear (1-trip
detection logic).
Output signal duty equals 100%.
HINT:
SL1 output signal duty is less than 100% under normal
conditions.
Open or short in shift
solenoid valve SL1
circuit
Shift solenoid valve
SL1
ECM
MONITOR DESCRIPTION
This DTC indicates an open or short in the shift solenoid valve SL1 circuit. The ECM commands gear shifts by
turning the shift solenoid valves ON/OFF. When there is an open or short circuit in any shift solenoid valve circuit,
the ECM detects the problem, illuminates the MIL and stores the DTC. Also, the ECM performs the fail-safe
While driving and shifting between 4th and 5th gears, if the ECM detects an open or short in the shift solenoid
valve SL1 circuit, the ECM determines that there is a malfunction
.
MONITOR STRATEGY
Related DTCs
P0748: Shift solenoid valve SL1/Range check
Required sensors/Components
Shift solenoid valve SL1
Duration
1 second
MIL operation
Immediately
TYPICAL ENABLING CONDITIONS
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
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