Code No. P0746:
Abnormality in Hydraulic Control System Function
DIAGNOSTIC FUNCTION
If the pulley ratio, which is calculated according to the primary pulley speed and the
secondary pulley speed, exceeds the standard value, the CVT-ECU determines that the line pressure
is abnormal.
JUDGEMENT CRITERIA
- Pulley ratio is more than 2.55 for 0.2 seconds, or more than 3.55 for 0.1
second.
PROBABLE CAUSES
- Malfunction of the CVT assembly (Faulty line pressure solenoid valve or valve
body assembly)
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STEP 1. Check the following connector
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Check the terminals for a contact status problem and internal short circuit.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the defective connector.
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STEP 2. Measure the output wave pattern of the line pressure solenoid
valve at CVT-ECU connector (PLLS terminal).
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(1)Connect the CVT assembly connector.
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(2)Selector lever position: P range.
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(4)Connect an oscilloscope, and measure the voltage between CVT-ECU connector PLLS
terminal and body earth.
OK: A wave pattern such as the one shown on  (Check
Procedure Using an Oscilloscope) should be output, and the maximum value should be 11 V or more
and the minimum value should be 1 V or less. There should be no noise in the output wave pattern.
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Q.
Is the check result normal?
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Go to Step 3.
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Refer to diagnosis code No.P0962: Line Pressure Solenoid Valve (short to earth) ,
or diagnosis code No.P0963: Line Pressure Solenoid Valve (open circuit/ short to power
supply) .
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STEP 3. Symptom recheck after erasing diagnosis code
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to the LOCK (OFF) position, and then wait for one minute.
Then drive the vehicle until the engine has been warmed up.
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(3)Check if the diagnosis code is stored.
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Q.
Is the diagnosis code stored?
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Replace the CVT assembly.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunctions .).
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