DTC P1783 [GF4AX-EL]

id0502a2807700

DTC P1783

ATF overheating

DETECTION CONDITION

• ATF temperature is 138 ×C {280 ×F} or more
Diagnostic support note:
• This is a continuous monitor (CCM).
• The MIL does not illuminate if the PCM detects the above malfunction conditions during the first drive cycle.
• A PENDING CODE is not available.
• FREEZE FRAME DATA not available.
• The O/D OFF indicator light illuminates.
• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Internal transaxle malfunction
• Oil cooler malfunction
• ATF level low
• TFT sensor malfunction.
• Open circuit in wiring harness between TFT sensor terminal A (wiring harness-side) and solenoid valve connector terminal I (transaxle case side).
• Short to ground in wiring harness between TFT sensor terminal A (wiring harness-side) and solenoid valve connector terminal I (transaxle case side).
• Open circuit in wiring harness between TFT sensor terminal B (wiring harness-side) and solenoid valve connector terminal J (transaxle case side).
• Open circuit in wiring harness between solenoid valve connector terminal I (wiring harness-side) and PCM terminal 22 (wiring harness-side).
• Short to ground in wiring harness between solenoid valve connector terminal I (wiring harness-side) and PCM terminal 22 (wiring harness-side).
• Open circuit in wiring harness between solenoid valve connector terminal J (wiring harness-side) and PCM terminal 25 (wiring harness-side).
• Damaged connectors between TFT sensor and PCM.
• PCM malfunction.

Diagnostic procedure

STEP

INSPECTION

ACTION

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 SERVICE 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 DTCS

• Turn the ignition switch to the LOCK position, then to the ON position.
• Verify the DTCs in the PCM memory.
• Are except DTC P1783 output?
Yes
Go to the applicable DTC inspection.
No
Go to SYMPTOM TROUBLESHOOTING, "NO.23 TRANSAXLE OVERHEATS", then go to the next step.
4
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.
• Warm up the engine.
• Drive the vehicle in D range and make sure that gears shift smoothly from 1GR to 4GR.
• Are any DTCs present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
5
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.