DESCRIPTION
Changing from 1st to 6th is performed by the ECM turning shift solenoid valves
SL1, SL2, SL3 and SL4 on and off. If an open or short circuit occurs in any of the
shift solenoid valves, the ECM controls the remaining normal shift solenoid valves
to allow the vehicle to be operated (See page ).
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
P0778 |
An open or short circuit (output signal duty is 0% or 100%) is detected by the ECM in the shift solenoid valve SL2 circuit while driving and shifting gears (SL2 output signal duty is more than 3% and less than 100% under normal conditions) (1 trip detection logic). |
|
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 or off. When there is an open or short circuit in any of the shift solenoid valve circuits, the ECM detects the problem and illuminates the MIL and stores the DTC. The ECM also performs the fail-safe function and turns the other normal shift solenoid valves on or off. (In case of an open or short circuit, the ECM stops sending current to the circuit.)
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 (See
page ).
MONITOR STRATEGY
Related DTCs |
P0778: Shift solenoid valve SL2/Range check |
Required sensors/Components |
Shift solenoid valve SL2 |
Frequency of operation |
Continuous |
Duration |
1 sec. |
MIL operation |
Immediately |
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
All:
The monitor will run whenever the following DTCs are not stored |
None |
Solenoid current cut status |
Not cut |
Ignition switch |
ON |
Starter |
OFF |
Battery voltage |
12 V or higher |
Battery voltage |
10 V or higher, and below 12 V |
Target current |
Below 0.75 A |
Battery voltage |
8 V or higher |
Target current |
0.25 A or higher |
TYPICAL MALFUNCTION THRESHOLDS
One of the following conditions is met: Condition (A), (B) or (C)
Condition (A) and (B):
Output duty cycle |
100% or more |
Output duty cycle |
0% or less |
COMPONENT OPERATING RANGE
Output duty cycle |
More than 3%, and less than 100% |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
HINT:
ECM commanded gear |
1st |
2nd |
3rd |
4th |
5th |
6th |
Shift solenoid valve SL2 |
OFF |
OFF |
OFF |
ON |
ON |
ON |
PROCEDURE
1. |
INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL2) |
(a) Disconnect the E1 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+) - 16 (SL2-) |
20°C (68°F) |
5.0 to 5.6 Ω |
15 (SL2+) - Body ground |
Always |
10 kΩ or higher |
16 (SL2-) - Body ground |
Always |
10 kΩ or higher |
*a |
Component without harness connected (Transmission Wire) |
NG | ![]() |
GO TO STEP 3 |
|
2. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
(a) Disconnect the ECM connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E19-7 (SL2+) - E19-6 (SL2-) |
20°C (68°F) |
5.0 to 5.6 Ω |
E19-7 (SL2+) - Body ground |
Always |
10 kΩ or higher |
E19-6 (SL2-) - Body ground |
Always |
10 kΩ or higher |
*a |
Rear view of wire harness connector (to ECM) |
OK | ![]() |
REPLACE ECM |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
3. |
INSPECT SHIFT SOLENOID VALVE SL2 |
(a) Remove shift solenoid valve SL2 (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1 - 2 |
20°C (68°F) |
5.0 to 5.6 Ω |
(c) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.
OK:
Measurement Condition |
Specified Condition |
---|---|
|
Valve moves and makes an operating noise |
*1 |
Shift Solenoid Valve SL2 |
OK | ![]() |
REPLACE TRANSMISSION WIRE |
NG | ![]() |
REPLACE SHIFT SOLENOID VALVE SL2 |
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
Engine ...
Slip Indicator Light Remains ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination
meter assembly via CAN communication.
The slip indicator light blinks during VSC and/or TRAC operation.
If a malfunction is detected, the slip indicator light comes on to warn the driver
(See page ).
...
AUTO LSD Indicator Light does not Come ON
DESCRIPTION
The AUTO LSD does not operate even if the VSC OFF switch is pressed under the
following conditions:
The brake system is faulty.
The temperature inside the hydraulic brake booster increases and the
AUTO LSD operation is suspended.
WIRING DIAGRAM
CAUTION / NOTI ...