DTC P1783:00 [FS5A-EL]


id050221820700

DTC P1783:00

ATF high oil temperature malfunction

DETECTION CONDITION
•  The TCM detects that ATF temperature is more than 149.5 °C {301.1 °F} when the following conditions are met.
―  TFT sensor circuit malfunction: not stored
―  Input voltage from the TFT sensor is more than 0.12 V
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
•  High engine load drive (Driving a steep gradient at a low speed.)
•  Deteriorated ATF
•  Insufficient or excess level of ATF
•  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
VERIFY VEHICLE DRIVING CONDITIONS
•  Verify each PID of “HTM_CNT” and “HTM_DIS”.
•  Verify vehicle driving conditions when a DTC P1783:00 is output.
•  Has the vehicle been driven at a high engine load?
Yes
Go to Step 5.
Inform the customer that the transaxle temperature is high due to high engine load driving.
No
Go to the next step.
3
INSPECT ATF CONDITION
•  Inspect the ATF condition.
•  Is it normal?
Yes
Go to the next step.
No
Replace the ATF, then go to Step 5.
4
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 5.
5
VERIFY TROUBLESHOOTING OF DTC P1783:00 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.  Start the engine.
2.  Idle the engine for 1 s or more.
•  Is the same DTC present?
Yes
Replace the TCM, then go to the next step.
No
Go to the next step.
6
VERIFY NO DTC HAS BEEN PRESENTED
•  Perform the “Reading DTCs Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.