one code stored in the cvt module. P0746 23A-40 CVT
DTC P0746: Abnormality in Hydraulic Control System Function
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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 TCM determines that the line pressure is abnormal.
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DESCRIPTIONS OF MONITOR METHODS
The ratio between the primary pulley speed and the secondary pulley speed is 2.55 or more for 0.2 seconds, or 3.35 or more for 0.1 second.
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MONITOR EXECUTION
Transmission range, R or B
Primary speed: 500 r/min or more
Acceleration: -0.05G or more
Engine speed: 450 r/min or more
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MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
P0705: Malfunction of transmission range switch
P0715: Malfunction of primary pulley speed sensor
P0720: Abnormality in output speed sensor
P0791: Malfunction of the secondary pulley speed sensor
U0001: Malfunction of CAN communication
U0100: CAN time-out error (engine)
Sensor (The sensor below is determined to be normal)
Transmission range switch
Primary pulley speed sensor
Output speed sensor
Secondary pulley speed sensor
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DIAGNOSIS
TSB Revision
CVT 23A-41
LOGIC FLOW CHARTS (Monitor Sequence)
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DTC SET CONDITIONS
Check Conditions
Transmission range switch position: D, R or B.
Engine speed: 450 r/min or more.
Primary pulley speed: 500 r/min or more.
Acceleration: -0.05G or more
Judgment Criteria
Pulley ratio (primary pulley speed/secondary pulley speed) more than 2.55 for 0.2 second.
Pulley ratio (primary pulley speed/secondary pulley speed) more than 3.35 for 0.1 second.
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OBD-II DRIVE CYCLE PATTERN
The vehicle is driven for at least 10 seconds with the accelerator opening angle at 20% or more.
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PROBABLE CAUSES
Malfunction of the transaxle assembly (Faulty line pressure solenoid valve or valve body assembly)
ACC07017STARTYesYesNoContinuous failure for 0.1 secNoYesGoodMalfunctionENDYesYesNoNoRatio > 2.55Ratio > 3.35Continuous failure for 0.2 secAll secondary parametersare in the enable condition.No
DIAGNOSIS
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23A-42 CVT
DIAGNOSIS
STEP 1. Check the following connector
CVT assembly connector
Check the terminals for a contact status problem and internal short circuit.
Q:Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
STEP 2. Measure the output wave pattern of the line pressure solenoid valve at TCM connector (PLLS terminal).
(1)Connect the CVT assembly connector.
(2)Selector lever position: P range.
(3)Engine: Idling
(4)Connect an oscilloscope, and measure the voltage between TCM connector PLLS terminal and body ground.
OK: A wave pattern such as the one shown on P.23A-116 (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.
Q:Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to diagnostic trouble code No.P0962: Line Pressure Solenoid Valve (short to ground) P.23A-60, or diagnostic trouble code No.P0963: Line Pressure Solenoid Valve (open circuit/ short to power supply) P.23A-62.
STEP 3. Symptom recheck after erasing diagnostic trouble code
(1)Erase the diagnostic trouble code.
(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.
(3)Check if the diagnostic trouble code is stored.
Q:Is the diagnostic trouble code stored?
YES :
Replace the transaxle assembly.
NO :
Intermittent malfunction (Refer to GROUP 00 How to Cope with Intermittent Malfunctions P.00-13.).
Kinda good news, no chunks oh smooh in the pan. Just the regular normal smooh. Looking like it may need a valvebody soon?
Last edited by Fummins; 11-06-2019 at 03:37 PM.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)