DTC P0745 [FN4A-EL]


DTC P0745	Pressure control solenoid malfunction
DETECTION CONDITION	• If the PCM detects either of the following conditions, the PCM determines that pressure control solenoid circuit has a malfunction. - Pressure control solenoid voltage stuck 0 V after engine start - Pressure control solenoid voltage stuck B+ after engine start Diagnostic support note: • This is a continuous monitor (CCM). • The MIL does not illuminate if PCM detects above malfunction conditions during the first drive cycle. • A 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	• Pressure control solenoid malfunction • Open circuit in wiring harness between pressure control solenoid terminal B and ATX terminal I • Open circuit in wiring harness between ATX terminal I and PCM terminal 1T • Short to ground in wiring harness between ATX terminal D and PCM terminal 1P • Short to power supply in wiring harness between ATX terminal D and PCM terminal 1P • Open circuit in wiring harness between pressure control solenoid terminal A and ATX terminal D • Open circuit in wiring harness between ATX terminal D and PCM terminal 1P • Damaged connector between pressure control solenoid and PCM • PCM malfunction


STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	INSPECT ATX CONNECTOR FOR POOR CONNECTION • Turn the ignition switch to the LOCK position. • Disconnect the ATX connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is the connection normal?	Yes	Go to the next step.
2		No	Repair or replace the connector and/or terminals, then go to Step 10.
3	INSPECT RESISTANCE • Inspect the resistance between ATX terminals D and I (transaxle case side). • Is the resistance within 2.4-7.3 ohms? (See Resistance Inspection (On-Vehicle Inspection).)	Yes	Go to Step 6.
3		No	Go to the next step.
4	INSPECT PRESSURE CONTROL SOLENOID CONNECTOR FOR POOR CONNECTION • Disconnect the pressure control solenoid connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is the connection normal?	Yes	Go to the next step.
4		No	Repair or replace the connector and/or terminals, then go to Step 10.
5	INSPECT RESISTANCE • Inspect the resistance between the pressure control solenoid terminals A and B. • Is the resistance within 2.4-7.3 ohms? (See Resistance Inspection (Off-Vehicle Inspection).)	Yes	Replace the solenoid wiring harness, then go to Step 10.
5		No	Verify pressure control solenoid installation. • If solenoid installed correctly, replace the pressure control solenoid, then go to Step 10. (See SOLENOID VALVE REMOVAL/INSTALLATION [FN4A-EL].)
6	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is the connection normal?	Yes	Go to the next step.
6		No	Repair or replace the connector and/or terminals, then go to Step 10.
7	INSPECT ATX CONNECTOR CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between the PCM (wiring harness-side) and ATX connector (wiring harness-side). - PCM terminal 1P and ATX terminal D - PCM terminal 1T and ATX terminal I • Is there continuity between terminals?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness, the go to Step 10.
8	INSPECT ATX CONNECTOR CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the ignition switch to the ON position (engine off). • Inspect the voltage at ATX terminal D (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness, then go to Step 10.
9	INSPECT PCM CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch to the LOCK position. • Inspect for continuity between ATX terminal D (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness, then go to the next step.
9		No	Go to the next step.
10	VERIFY TROUBLESHOOTING OF DTC P0745 COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC from the memory using the WDS or equivalent. • Make sure to wait more than 1 s after turning the ignition switch to the ON position. • Are any DTCs present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [ZY].)
10		No	No concern is detected. Go to the next step.
11	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.
11		No	DTC troubleshooting completed.