P0748
DTC P0748 PRESSURE CONTROL SOLENOID A - ELECTRICALCOMPONENT LOCATION
Refer to DTC P0741. P0741
GENERAL DESCRIPTION
In order to control the optimum line pressure and improve the efficiency of power transmission according to maximize the efficiency of the oil pump, the VFS (Variable Force Solenoid) valve has been added in the valve body hydraulic circuit.
DTC DETECTING CONDITION
DTC DETECTING CONDITION:
SPECIFICATION
Refer to DTC P0743. P0743
SCHEMATIC DIAGRAM
Refer to DTC P0741. P0741
TERMINAL & CONNECTOR INSPECTION
Refer to DTC P0743. P0743
POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect A/T SOLENOID VALVE connector.
2. Measure voltage between terminal 6 of the sensor harness connector and chassis ground.
3. Turn ignition switch OFF - ON.
Specification: 12 V is measured only for approximately 0.5 sec
Specification:
4. Is voltage within specifications?
YES > Go to Signal circuit inspection procedure.
NO > Check that A/T-20A Fuse in engine room junction is installed or not blown. Check for open in harness. Repair as necessary and go to Verification of Vehicle Repair procedure.
SIGNAL CIRCUIT INSPECTION
1. Check signal circuit open inspection
1. Ignition OFF.
2. Disconnect A/T SOLENOID VALVE connector and PCM/TCM connector.
3. Measure resistance between terminal 8 of the ATM SOLENOID VALVE harness connector and terminal 19 of the TCM (PCM) harness connector
Specification: approximately 0 Ohms
Specification:
4. Is resistance within specifications?
YES > Go to Check signal circuit short inspection procedure.
NO > Check for open in harness. Repair as necessary and go to Verification of Vehicle Repair procedure.
2. Check signal circuit short inspection
1. Ignition OFF.
2. Disconnect A/T SOLENOID VALVE connector and TCM (PCM) connector.
3. Measure resistance between terminal 8 of the ATM SOLENOID VALVE harness and chassis ground.
Specification: Infinite
Specification:
4. Is resistance within specifications?
YES > Go to Component Inspection procedure.
NO > Check for short to ground in harness. Repair as necessary and go to Verification of Vehicle Repair procedure.
COMPONENT INSPECTION
1. CHECK SOLENOID VALVE
1. Ignition OFF.
2. Disconnect A/T SOLENOID VALVE connector.
3. Measure resistance between terminal 8 and terminal 6 of the ATM SOLENOID VALVE harness connector.
Specification: Approximately 2.7 - 3.4 Ohms [20°C (68°F)]
Specification:
4. Is resistance within specification?
YES > Go to CHECK TCM (PCM).
NO > Replace VFS SOLENOID VALVE as necessary and go to Verification of Vehicle Repair procedure.
2. CHECK TCM (PCM)
1. Connect SCAN TOOL to data link connector (DLC).
2. Ignition ON & Engine OFF.
3. Select A/T Solenoid valve Actuator test and Operate Actuator test.
4. Can you hear operating sound for VFS SOLENOID VALVE Actuator Testing Function?
YES > Go to Verification of Vehicle Repair procedure.
NO > Replace TCM (PCM) as necessary and go to Verification of Vehicle Repair procedure.
ACTUATOR TEST CONDITION
1. IG SWITCH ON
2. TRANSAXLE RANGE SWITCH is normal
3. P RANGE
4. Vehicle Speed 0 km/h
5. Throttle position sensor < 1 V
6. IDLE SWITCH ON
7. ENGINE RPM 0
VERIFICATION OF VEHICLE REPAIR
Refer to DTC P0741. P0741