DTC P0742:00 [FS5A-EL]

id050221818300

DTC P0742:00

TCC stuck on
DETECTION CONDITION
•  The TCM detects that difference between the engine speed and input shaft rotation speed (PID monitor item “TSS”) is 50 rpm or less when the following conditions are met.
―  Gear position: 4GR
―  Accelerator pedal position: 0.78% or less, 3.125—6.25%, or 6.25% or more
―  Vehicle speed: 66 km/h {41 mph} or less
―  TCC operation: Off
Diagnostic support note
•  The MIL does not illuminate.
•  The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
•  PENDING CODE is not available.
•  FREEZE FRAME DATA is not available.
•  The DTC is stored in the TCM memory.
POSSIBLE CAUSE
•  Deteriorated ATF
•  ATF level low
•  Solenoid valve malfunction
―  Pressure control solenoid A
―  Shift solenoid A
―  Shift solenoid B
―  Shift solenoid C
―  Shift solenoid D
―  Shift solenoid E
•  Line pressure malfunction
•  Primary control valve body malfunction
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
INSPECT ATF CONDITION
•  Inspect the ATF condition.
•  Is it normal?
Yes
Go to the next step.
No
Replace the ATF, then go to Step 7.
(See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FS5A-EL])
3
INSPECT ATF LEVEL
•  Inspect the ATF level.
•  Is it normal?
Yes
Go to the next step.
No
Add ATF to the specified level, then go to Step 7.
(See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL])
4
INSPECT SOLENOID VALVE
•  Inspect the following solenoid valves:
―  Pressure control solenoid A
―  Shift solenoid A
―  Shift solenoid B
―  Shift solenoid C
―  Shift solenoid D
―  Shift solenoid E
•  Is there any malfunction?
Yes
Replace the solenoid valve, then go to Step 7.
(See SOLENOID VALVE REMOVAL/INSTALLATION [FS5A-EL].)
No
Go to the next step.
5
INSPECT LINE PRESSURE
•  Perform the “Line Pressures Test”.
•  Is there any malfunction?
Yes
Repair or replace malfunctioning part according to test result, then go to Step 7.
No
Go to the next step.
6
INSPECT PRIMARY CONTROL VALVE BODY
•  Remove the primary control valve body.
•  Disassemble the primary control valve body.
•  Inspect the following parts:
―  Shift valve
―  Return spring
―  Hydraulic passage
•  Is there any malfunction?
Yes
Repair or replace malfunctioning part according to inspection result, then go to next step.
No
Replace the transaxle, then go to the next step.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FS5A-EL].)
7
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC using the M-MDS.
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Drive the vehicle under the following conditions for 5 s or more.
―  4GR
―  Accelerator pedal position: 0.78% or less
―  Vehicle speed: 66 km/h {41 mph} or less
―  TCC operation: Off
2.  Drive the vehicle under the following conditions for 3 s or more.
―  4GR
―  Accelerator pedal position: 3.125—6.25%
―  Vehicle speed: 66 km/h {41 mph} or less
―  TCC operation: Off
3.  Drive the vehicle under the following conditions for 5 s or more.
―  4GR
―  Accelerator pedal position: 6.25% or more
―  Vehicle speed: 66 km/h {41 mph} or less
―  TCC operation: Off
•  Is the same DTC present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [FS5A-EL].)
No
Go to the next step.
8
VERIFY NO DTCs ARE PRESENT
•  Perform the “Reading DTCs Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL].)
No
DTC troubleshooting completed.