DESCRIPTION
Changing from 1st to 6th is performed by the TCM turning shift solenoid valves SL1, SL2, SL3, SL4 and SL on and off. If an open or short circuit occurs in any of the shift solenoid valves, the TCM controls the remaining normal shift solenoid valves to allow the vehicle to be operated (See page ).
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
P0778 |
The TCM checks for an open or short in the shift solenoid valve SL2 circuit while driving and shifting gears. (1-trip detection logic)
|
|
MONITOR DESCRIPTION
This DTC indicates an open or short in the shift solenoid valve SL2 circuit. The TCM 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 TCM detects the problem and illuminates the MIL and stores the DTC. The TCM 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 TCM stops sending current to the circuit.)
While driving and shifting gears, if the TCM detects an open or short in the shift solenoid valve SL2 circuit, the TCM 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 |
Immediate |
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
All
The monitor will run whenever the following DTCs are not present |
None |
Ignition switch |
ON |
Starter |
OFF |
Battery voltage |
12 V or more |
Battery voltage |
10 V or more and less than 12 V |
Target current |
Less than 0.75 A |
Battery voltage |
8 V or more |
Target current |
0.25 A or more |
TYPICAL MALFUNCTION THRESHOLDS
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:
Perform the universal trip to clear permanent DTCs (See page ).
HINT:
The following table shows normal operation of the shift solenoid valve SL2 when the shift lever is in D:
TCM commanded gear |
1st |
2nd |
3rd |
4th |
5th |
6th |
Shift solenoid valve SL2 |
OFF |
OFF |
OFF |
ON |
ON |
ON |
PROCEDURE
1. |
INSPECT TRANSMISSION WIRE (SL2) |
(a) Remove the TCM from the transaxle. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
9 (SL2+) - 8 (SL2-) |
20°C (68°F) |
5.0 to 5.6 Ω |
9 (SL2+) - Body ground |
Always |
10 kΩ or higher |
8 (SL2-) - Body ground |
Always |
10 kΩ or higher |
9 (SL2+) - All other terminals except 8 (SL2-) |
Always |
10 kΩ or higher |
8 (SL2-) - All other terminals except 9 (SL2+) |
Always |
10 kΩ or higher |
OK |
REPLACE TCM |
|
2. |
INSPECT SHIFT SOLENOID VALVE SL2 |
(a) Remove shift solenoid valve SL2. |
|
(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 |
*1 |
Shift Solenoid Valve SL2 |
(c) Connect a battery positive (+) lead with a 21 W bulb to terminal 2 and a negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating sound.
OK:
Valve moves and makes an operating sound.
OK |
REPAIR OR REPLACE TRANSMISSION WIRE |
NG |
REPLACE SHIFT SOLENOID VALVE SL2 |
Engine (ignition) switch (vehicles with smart key system)
Performing the following operations when carrying the electronic key on your
person starts the engine or changes “ENGINE START STOP” switch modes.
- Starting the engine
Check that the parking brake is set.
Check that the shift lever is set
i ...
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL REAR DRIVE SHAFT DUST COVER
(a) Using SST and a steel plate, install a new rear drive shaft dust
cover to the rear drive shaft inboard joint assembly.
Text in Illustration
*1
...
Sound Quality is Bad Only when CD is Played (Volume is Too Low)
PROCEDURE
1.
REPLACE CD AND RECHECK
(a) Replace the CD with a known good one and check that the malfunction disappears.
OK:
Malfunction disappears.
OK
END
NG
REPLACE RADIO AN ...