DTC P0747 / P0777 / P0797
Precautions: Precautions for Diagnosing Trouble · Precautions for Disassembly and Reassembly · Precautions for Transmission / Transaxle · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0747: Pressure Control Solenoid “A” Stuck On The gear commanded by TCM does not match the actual gear when driving. (2 D/C detection logic) |
•Line pressure control solenoid valve
•Pressure control solenoid valve “A”, “B” and “C” •TCM |
|
P0777: Pressure Control Solenoid “B” Stuck On The gear commanded by TCM does not match the actual gear when driving. (2 D/C detection logic) |
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P0797: Pressure Control Solenoid “C” Stuck On The gear commanded by TCM does not match the actual gear when driving. (2 D/C detection logic) |
DTC Confirmation Procedure
WARNING:
If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.
•Select a level road with no traffic to minimize the risk of accident.
•Perform the test extremely carefully.
•Perform the road test using 2 persons, a driver and a tester.
•Perform the test extremely carefully.
•Perform the road test using 2 persons, a driver and a tester.
NOTE:
•Check that the following condition is met in this “DTC Confirmation Procedure”.
—DTC U0073 or U0100 is not detected.
•Troubleshoot first unexpected DTCs previously detected in “DTC Confirmation Procedure”.
1)Warm up engine to normal operating temperature.
2)Drive vehicle at approx. 50 km/h (31 mile/h) or more in D range for 1 minute.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “A/T Control System Check” performed?
|
Go to Step 2.
|
Go to A/T Control System Check.
|
| 2 |
ATF check
1)Check ATF for level and deterioration.
Is check result OK?
|
Go to Step 3.
|
Refill or change ATF.
|
| 3 |
Solenoid valve check
1)Remove valve body assembly.
2)Check applicable solenoid valve for proper operation as shown in the following table.
Is check result OK?
|
Go to Step 4.
|
Replace valve body assembly.
|
| 4 |
Valve body check
1)Check that each fluid passage is not clogged in valve body assembly.
Is check result OK?
|
Substitute a known-good TCM and recheck DTC.
|
Clean or replace valve body assembly.
|
Table for Step 3 (Solenoid valve check)
| DTC | Line pressure control solenoid valve | Pressure control solenoid valve | ||
|---|---|---|---|---|
| A | B | C | ||
| P0747 |  |
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| P0777 | |
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| P0797 | |
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