DTC P1783:00 [FN4A-EL]

id050218820700

DTC P1783:00

ATF high oil temperature malfunction

DETECTION CONDITION

•  The PCM 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 PCM 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 PCM memory.

POSSIBLE CAUSE

•  High engine load drive (Driving a steep gradient at a low speed.)

•  Deteriorated ATF

•  Insufficient or excess level of ATF

•  PCM malfunction

DTC P1783:00	ATF high oil temperature malfunction
DETECTION CONDITION	• The PCM 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 PCM 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 PCM memory.
POSSIBLE CAUSE	• High engine load drive (Driving a steep gradient at a low speed.) • Deteriorated ATF • Insufficient or excess level of ATF • PCM 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.
1		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.
2		No	Go to the next step.
3	INSPECT ATF CONDITION • Inspect the ATF condition. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FN4A-EL].) • Is it normal?	Yes	Go to the next step.
3		No	Replace the ATF, then go to Step 5. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FN4A-EL])
4	INSPECT ATF LEVEL • Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FN4A-EL].) • Is it normal?	Yes	Go to the next step.
4		No	Add ATF to the specified level, then go to Step 5. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FN4A-EL])
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 PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [FN4A-EL].)
5		No	Go to the next step.
6	VERIFY NO DTC HAS BEEN PRESENTED • Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FN4A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FN4A-EL].)
6		No	DTC troubleshooting completed.