DTC P1783[FN4A-EL]

id0502a1807700

DTC P1783

ATF high oil temperature malfunction

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 PCM terminal 1AH (ZY)/1AU (Z6)/1U (LF).

Diagnostic support note:

•  This is a continuous monitor (CCM).

•  The MIL does not illuminate if the PCM 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 PCM 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

•  PCM malfunction

DTC P1783	ATF high oil temperature malfunction
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 PCM terminal 1AH (ZY)/1AU (Z6)/1U (LF). Diagnostic support note: • This is a continuous monitor (CCM). • The MIL does not illuminate if the PCM 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 PCM 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 • 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.
1		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 Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		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 automatic transaxle temperature is high due to high engine load driving.
3		No	Go to the next step.
4	INSPECT ATF CONDITION • Turn the ignition switch to the LOCK position. • Inspect the ATF condition. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION[FN4A-EL].) ― Clear red: Normal ― Milky: Water mixed in fluid ― Reddish brown: Deteriorated ATF • Is it normal?	Yes	Go to the next step.
4		No	If the ATF color is milky or reddish brown, replace ATF, then go to Step 6. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT[FN4A-EL].)
5	INSPECT ATF LEVEL • Start the engine. • Warm up the transaxle. • Is the ATF level within the specification? (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION[FN4A-EL].)	Yes	Go to the next step.
5		No	Add ATF to the specified level, then go to the next step. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION[FN4A-EL].)
6	VERIFY TROUBLESHOOTING OF DTC P1783 COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC from the memory using the M-MDS. • Start the engine. • Warm up the transaxle. • Is the PENDING CODE present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].) (See PCM REMOVAL/INSTALLATION[LF, L3].)
6		No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See AFTER REPAIR PROCEDURE[FN4A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[FN4A-EL].)
7		No	DTC troubleshooting completed.