Code No. P0797:
SL2 MAX Pressure Failure
OPERATION
The ECU detects the current gear/speed according to the output signals from the
input and output shaft speed sensor.
DIAGNOSIS CODE SET CONDITIONS
- If the output shaft speed sensor output value, which is multiplied by the
gear ratio, deviates from the input shaft speed sensor output value by a predetermined range
or more after the gear shifting, diagnosis code No. P0797 is set.
- If the output shaft speed sensor output value, which is multiplied by the gear ratio,
deviates from the input shaft speed sensor output value by a predetermined range or less before
the gear shifting, diagnosis code No. P0797 is set.
PROBABLE CAUSES
- Damaged harness wires and connectors
- Malfunction of the A/T-ECU
- Malfunction of solenoid valve
- Malfunction of the valve body assembly
- Malfunction of the transmission assembly
- Malfunction of the pressure control solenoid SL2 system (for diagnosis codes No.
P0969, P0970, P0971)
- Malfunction of the shift solenoid SR system (for diagnosis codes No. P0973, P0974)
- Malfunction of the shift solenoid SB system (for diagnosis codes No. P0976, P0977)
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Check the pressure control solenoid SL2 and the shift solenoid SR, SB.
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Q.
Is the check result normal?
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Go to Step 2.
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Replace the valve body assembly.
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STEP 2. Check whether the diagnosis code is set again.
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(1)Erase the set diagnosis code.
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(2)Turn the ignition switch to the "LOCK" (OFF) position.
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(3)Turn the ignition switch to the "ON" position.
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(4)Check again if the diagnosis code is set.
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Q.
Is diagnosis code No. P0797 set?
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Replace the valve body assembly or the transmission assembly.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunction).
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