Toyota Tundra (2015 year). Manual — part 459
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000W8G0I8X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0778; Pressure Control
Solenoid "B" Electrical (Shift Solenoid Valve SL2); 2015 MY Tundra [08/2014 - ]
DTC
P0778
Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)
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
P0778
The ECM checks for an open or short in the shift solenoid valve
SL2 circuit while driving and shifting gears (1-trip detection
logic).
Output signal duty equals 100%.
HINT:
SL2 output signal duty is less than 100% under normal
conditions.
Open or short in shift
solenoid valve SL2
circuit
Shift solenoid valve SL2
ECM
MONITOR DESCRIPTION
This DTC indicates an open or short in the shift solenoid valve SL2 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 gears, if the ECM detects an open or short in the shift solenoid valve SL2 circuit, the
ECM determines there is a malfunction
.
MONITOR STRATEGY
Related DTCs
P0778: Shift solenoid valve SL2/Range check
Required sensors/Components
Shift solenoid valve SL2
Duration
1 second
MIL operation
Immediately
TYPICAL ENABLING CONDITIONS
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
The monitor will run whenever the following DTCs are not present
None
Solenoid current cut status
Not cut
Battery voltage
11 V or more
Ignition switch
ON
Starter
OFF
TYPICAL MALFUNCTION THRESHOLDS
Solenoid status from solenoid driver MIC
Fail
COMPONENT OPERATING RANGE
Output signal duty
Less than 100%
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Perform the universal trip to clear permanent DTCs
.
HINT:
The shift solenoid valve SL2 is turned ON/OFF normally when the shift lever is in D:
ECM gear shift command
1st
2nd
3rd
4th
5th
6th
Shift solenoid valve SL2
ON
ON
ON
ON
OFF
OFF
PROCEDURE
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
OK
1.
INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL2)
(a) Disconnect the D83 transmission wire connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
15 (SL2+) - 4 (SL2-)
20°C (68°F)
5.0 to 5.6 Ω
15 (SL2+) - Body ground
Always
10 kΩ or higher
4 (SL2-) - Body ground
Always
10 kΩ or higher
Text in Illustration
*a
Component without harness connected
(Transmission Wire)
NG
GO TO STEP 3
2.
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
(a) Disconnect the D74 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D74-12 (SL2+) - D74-13 (SL2-)
20°C (68°F)
5.0 to 5.6 Ω
D74-12 (SL2+) - Body ground
Always
10 kΩ or higher
D74-13 (SL2-) - Body ground
Always
10 kΩ or higher
Text in Illustration
*a
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM
3.
INSPECT SHIFT SOLENOID VALVE SL2
NG
REPLACE SHIFT SOLENOID VALVE SL2
OK
REPAIR OR REPLACE TRANSMISSION WIRE
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
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