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DTC P0745 [FN4A-EL]

BME050201030218

DTC P0745 | Pressure control solenoid malfunction
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DETECTION CONDITION | • If the PCM detects either of following conditions, the PCM determines that the pressure control solenoid circuit has a malfunction.

  - Pressure control solenoid voltage remains 0 V after engine start
  - Pressure control solenoid voltage remains B+ after engine start

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 is not available.
• The HOLD indicator light flashes.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Pressure control solenoid malfunction • Open circuit between pressure control solenoid terminal B and ATX terminal I • Open circuit between ATX terminal I and PCM terminal 3V • Short to ground between ATX terminal D and PCM terminal 3Y • Short to power supply between ATX terminal D and PCM terminal 3Y
• Open circuit between pressure control solenoid terminal A and ATX terminal D
• Open circuit between ATX terminal D and PCM terminal 3Y
• Damaged connector between pressure control solenoid and PCM
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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.
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.
No | Repair or replace the connector and/or terminals, then go to Step 10.
3 | INSPECT RESISTANCE • Inspect the resistance between ATX (transaxle case side) terminals D and I. • Is the resistance within 2.4-7.3 ohms? (See Resistance Inspection (On-Vehicle Inspection).) | Yes | Go to Step 6.
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.
No | Repair or replace the connector and/or terminals, then go to Step 10.
5 | INSPECT RESISTANCE • Inspect the resistance between 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.
No | Verify pressure control solenoid installation. • If the solenoid is 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.
No | Repair or replace the connector and/or terminals, then go to Step 10.
7 | INSPECT ATX CONNECTOR CIRCUIT FOR OPEN • Inspect for continuity between PCM (wiring harness-side) and ATX (vehicle wiring harness-side).

  - PCM terminal 3Y and ATX terminal D
  - PCM terminal 3V and ATX terminal I

• Is there continuity between the terminals?
Yes
Go to the next step.
No | Repair or replace the wiring harness, the go to Step 10.
8 | INSPECT ATX CONNECTOR CIRCUIT FOR SHORT TO POWER • Turn the ignition switch to the ON position (engine off). • Inspect the voltage at ATX terminal D (vehicle wiring harness-side). • Is the voltage 0 V? | Yes | Go to the next step.
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.
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 ignition switch to ON. • Are any DTCs present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3].)
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. (See DTC TABLE [FN4A-EL].)
No | DTC troubleshooting completed.