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DTC P1783 [FS5A-EL]

id050221807700

DTC P1783 | ATF high oil temperature malfunction
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DETECTION CONDITION | • When all conditions below are satisfied. - P0712, P0713 not output - ATF temperature 149.5 °C {301°F} or more - ATF oil temperature signal of 0.06 V or more is input to TCM terminal 2H. Diagnostic support note: • This is a continuous monitor (CCM). • The MIL does not illuminate if the TCM detects above malfunction conditions during the first drive cycle. • The PENDING CODE is not available. • FREEZE FRAME DATA is not available. • The AT warning light illuminates. • The DTC is stored in the TCM memory.
POSSIBLE CAUSE | • High engine load drive (Driving a steep gradient at a low speed.) • Insufficient or excess level of ATF • Deteriorated ATF • TFT sensor circuit malfunction • TCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Bulletins and/or on-line repair 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.
3 | VERIFY VEHICLE DRIVING CONDITIONS • Verify each PID monitor of the HTM_CNT and HTM_DIS. • Verify vehicle driving conditions when a DTC P1783 is output. • Has the vehicle been driven at a high engine load? | Yes | • Go to Step 6. • Inform the customer that the ATX temperature is high due to high engine load driving.
No | Go to the next step.
4 | INSPECT ATF CONDITION • Turn the ignition switch to the LOCK position. • Inspect the ATF condition. - Clear red: Normal - Milky: Water mixed in fluid - Reddish brown: Deteriorated ATF • Is it normal? (See Automatic Transaxle Fluid (ATF) Condition Inspection.) | Yes | Go to the next step.
No | If the ATF color is milky or reddish brown, replace ATF, then go to Step 6. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FS5A-EL].)
5 | INSPECT ATF LEVEL • Start the engine. • Warm up the ATX. • Is the ATF level within the specification? (See Automatic Transaxle Fluid (ATF) Level Inspection.) | Yes | Go to the next step.
No | Add ATF to the specified level, then go to the next step. (See Automatic Transaxle Fluid (ATF) Level Inspection.)
6 | VERIFY TROUBLESHOOTING OF DTC P1783 COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC from the memory using the WDS or equivalent. • Start the engine. • Warm up the ATX. • Is the PENDING CODE present? | Yes | Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [FS5A-EL].)
No | Go to the next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [FS5A-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection.
No | DTC troubleshooting completed.