P0746

DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRESSURE SOLENOID VALVE)





Description
- The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the TCM.




CONSULT-III Reference Value









On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0746 PRS CNT SOL/A FCTN" with CONSULT-III is detected under the following conditions.
- Unexpected gear ratio was detected in the LOW side due to excessively low line pressure.




Possible Cause
- Line pressure control system
- Output speed sensor (Secondary speed sensor)
- Input speed sensor (Primary speed sensor)




DTC Confirmation Procedure

CAUTION:
Always drive vehicle at a safe speed.

NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.
After the repair, touch "ERASE" on "SELF-DIAG RESULTS" and then perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III
1. Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Start engine and maintain the following conditions for at least 10 consecutive seconds. Test start from 0 km/h (0 MPH).
ATF TEMP SEN: 1.0 - 2.0 V
ACC PEDAL OPEN: More than 1.0/8
RANGE: "D" position
VEHICLE SPEED: 10 km/h (6 MPH) More than
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
3. If DTC is detected, go to "Diagnosis Procedure".

WITH GST
Follow the procedure "WITH CONSULT-III".




Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start vehicle and read out the value of "PRI PRESS".





Without CONSULT-III
1. Start engine.
2. Check voltage between TCM connector terminal and ground.





OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK LINE PRESSURE
Perform line pressure test. Refer to Inspections Before Trouble Diagnosis.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to Inspections Before Trouble Diagnosis.
3.DETECT MALFUNCTIONING ITEM
Check pressure control solenoid valve A (line pressure solenoid valve). Refer to P0745.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM AND INPUT SPEED
SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor) system. Refer to P0720, P0715.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
Check the following:
- Power supply and ground circuit for TCM. Refer to P1701.
- The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK DTC
Perform "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Replace the transaxle assembly or TCM. Refer to .