DTC P0734:00 [FS5A-EL]
id050221818100
DTC P0734:00 |
Gear 4 incorrect (incorrect gear ratio detected) |
---|---|
DETECTION CONDITION
|
• The TCM monitors revolution ratio of the forward clutch drum revolution to the secondary gear case revolution when the following monitoring conditions are met. If the revolution ratio is 0.6 or less or 1.249 or more, the TCM determines that there is a malfunction.
Monitoring conditions:
• The TCM monitors revolution ratio of the forward clutch drum revolution to the secondary gear case revolution when the following monitoring conditions are met. If the revolution ratio is within 0.91—1.09, the TCM determines that there is a malfunction.
Monitoring conditions:
Diagnostic support note:
• This is a continuous monitor (CCM).
• The MIL does not illuminate.
• The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is not available.
• A PENDING CODE is not available.
• The DTC is stored in the TCM memory.
|
POSSIBLE CAUSE
|
• ATF level low
• Deteriorated ATF
• Shift solenoids A, B or C stuck
• Pressure control solenoid A stuck
• Line pressure low
• 2-4 brake band slipping
• 3-4 clutch slipping
• Forward clutch slipping
• Control valve stuck (Bypass or 3-4 shift valve)
• Oil pump malfunction
• TCM malfunction
|
Diagnostic procedure
STEP |
INSPECTION |
ACTION |
|
---|---|---|---|
1
|
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related ServiceInformation availability.
• Is any related repair information available?
|
Yes
|
Perform repair or diagnosis according to the available repair information.
|
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 8.
|
||
3
|
INSPECT ATF LEVEL
• Start the engine.
• Warm up the ATX.
• Is the ATF level within the specification?
|
Yes
|
Go to the next step.
|
No
|
Add ATF to the specified level, then go to Step 8.
|
||
4
|
INSPECT SHIFT SOLENOID A AND D FOR CLICK SOUND
• Perform operation inspection.
• Verify the click sound of shift solenoids A and D when applying B+ to each transaxle terminal.
• Was a click heard from solenoids?
|
Yes
|
Go to the next step.
|
No
|
Replace the solenoid where you could not hear click sound, then go to Step 8.
|
||
5
|
INSPECT LINE PRESSURE
• Start the engine.
• Measure the line pressures.
• Are the line pressures within the specifications?
|
Yes
|
Go to the next step.
|
No
|
All ranges: Replace the oil pump, then go to Step 8.
Any ranges: Replace the primary control valve body, then go to Step 8.
|
||
6
|
INSPECT STALL SPEED
• Measure the stall speed in D range.
• Is the stall speed within the specification?
|
Yes
|
Go to the next step.
|
No
|
Replace the automatic transaxle, then go to Step 8.
|
||
7
|
INSPECT FREQUENCY OF INPUT/TURBINE SPEED SENSOR WHEN DRIVING VEHICLE
• Switch the ignition to off.
• Connect the oscilloscope.
• Start the engine.
• Measure the frequency of input/turbine speed sensor while driving vehicle under the following conditions:
• Was the frequency of the input/turbine speed sensor at approx. 1,300 Hz?
|
Yes
|
Go to the next step.
|
No
|
Replace the primary control valve body, then go to the next step.
|
||
8
|
VERIFY REPAIR OF DTC P0734:00 COMPLETED
• Make sure to reconnect all the disconnected connectors.
• Clear the DTC using the M-MDS.
• Start the engine.
• Warm up the transaxle.
• Drive the vehicle under the following conditions for more than 5 s:
• Is the same DTC present?
|
Yes
|
Replace the TCM, then go to the next step.
|
No
|
Go to the next step.
|
||
9
|
VERIFY AFTER REPAIR PROCEDURE
• Perform the “After Repair Procedure”.
• Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
|
No
|
DTC troubleshooting completed.
|