DESCRIPTION
Based on signals from the transmission speed sensors (NT, SP2 and NC3), the gear position is detected.
If the detected gear position is different than the commanded gear position, the TCM detects related mechanical problems in the shift solenoid valves, valve body and automatic transmission.
Tech Tips
Gear shift position when a problem occurs in shift solenoid valve SL2:
TCM gear shift command | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
Actual gear position under SL2 stuck ON malfunction | 5th | 8th | 7th | 6th | 5th | 6th | 7th | 8th |
Actual gear position under SL2 stuck OFF malfunction | 1st | 2nd | 3rd | 4th | N (1st)* | N* | N* | N* |
*: Neutral
DTC Code | DTC Detection Condition
|
Trouble Area |
---|---|---|
P0776 |
|
|
P0776 |
|
|
MONITOR DESCRIPTION
The TCM commands gear shifts by turning the shift solenoid valves on or off. According to the input shaft speed, intermediate (counter) shaft speed and output shaft speed, the TCM detects the actual gear position (1st, 2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear position). When the gear position commanded by the TCM and the actual gear position are not the same, the TCM illuminates the MIL.
WIRING DIAGRAM
Refer to DTC P2765 Click here.
INSPECTION PROCEDURE
PROCEDURE
CHECK DTC OUTPUT (IN ADDITION TO DTC P0771, P0776 AND P2714)
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Powertrain / ECT / DTC.
Read the DTCs using the intelligent tester.
Result | ||||||||
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Tech Tips
If any other codes besides P0771, P0776 and P2714 are output, perform troubleshooting for those DTCs first.
B |
INSPECT SHIFT SOLENOID VALVE SL2 Click here |
C |
GO TO DTC CHART Click here |
A |
CLEAR DTC AND PERFORM STALL SPEED TEST
Clear the DTCs Click here.
Tech Tips
Write down the currently output DTCs before clearing them.
Perform the stall speed test Click here.
Result | ||||||
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|
B |
INSPECT SHIFT SOLENOID VALVE SLT Click here |
A |
CLEAR DTC AND PERFORM RUNNING TEST
Clear the DTCs Click here.
Tech Tips
Write down the currently output DTCs before clearing them.
Start the engine, drive the vehicle and perform the inspection.
Result | ||||||||
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Tech Tips
*: If the transmission is shifted to 5th gear or above, gear shifts will no longer be able to be performed. When performing the test again, first clear the DTCs.
B |
INSPECT SHIFT SOLENOID VALVE SL2 Click here |
C |
INSPECT SPEED SENSOR TERMINAL (NC3 TERMINAL) Click here |
A |
INSPECT SHIFT SOLENOID VALVE SR
Remove shift solenoid valve SR Click here.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating noise.
OK |
---|
Valve moves and makes operating noise. |
OK |
INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here |
NG |
REPLACE SHIFT SOLENOID VALVE SR Click here
INSPECT SHIFT SOLENOID VALVE SL2
Remove shift solenoid valve SL2 Click here.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Connect the battery's positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating noise.
OK |
---|
Valve moves and makes operating noise. |
OK |
INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here |
NG |
REPLACE SHIFT SOLENOID VALVE SL2 Click here
INSPECT SHIFT SOLENOID VALVE SLT
Remove shift solenoid valve SLT Click here.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Connect the battery's positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating noise.
OK |
---|
Valve moves and makes operating noise. |
NG |
REPLACE SHIFT SOLENOID VALVE SLT Click here |
OK |
INSPECT TRANSMISSION VALVE BODY ASSEMBLY
Check the transmission valve body assembly Click here.
OK |
---|
There are no foreign objects on any valve. |
NG |
REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here |
OK |
INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY
Check the torque converter clutch assembly Click here.
OK |
---|
The torque converter clutch operates normally. |
NG |
REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY Click here |
OK |
REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Click here
INSPECT SPEED SENSOR TERMINAL (NC3 TERMINAL)
Disconnect the E50 transmission wire connector.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
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|
Turn the engine switch off.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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|
NG |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) Click here |
OK |
INSPECT TRANSMISSION WIRE (SPEED SENSOR NC3)
Disconnect the speed sensor (NC3) connector.
Disconnect the E50 transmission wire connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
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|
NG |
REPAIR OR REPLACE TRANSMISSION WIRE Click here |
OK |
REPLACE SPEED SENSOR Click here
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
Disconnect the E50 transmission wire connector.
Disconnect the E7 TCM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE TCM
Replace the TCM Click here.
NEXT |
PERFORM A/T CODE REGISTRATION Click here