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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Automatic Transmission - Diagnosis - GF4A-El) >> Diagnostic Tests >> DTC P0745: Pressure Control Solenoid Fault >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Mazda Millenia and 2001 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check for related service bulletins. Repair as necessary. Turn ignition off. Connect scan tool to DLC. Turn ignition on. Using scan tool, access LINE PID from PID/DATA MONITOR & RECORD menu. Actuate LINE PID. An audible "click" should be heard from pressure control solenoid. If pressure control solenoid clicks when actuated, check connectors, terminals and wiring harnesses for intermittent concern. Repair as necessary, then go to next step. If pressure control solenoid does not click when actuated, disconnect transaxle 10-pin harness connector and check connector for damage or pulled out terminals or corrosion. Repair as necessary. If transaxle connector is okay, go to next step.
  2. Using a DVOM, measure resistance between chassis ground and transaxle connector (component side) terminal "G". See Figure. If resistance is not 9-18 ohms, go to next step. If resistance is 9-18 ohms, disconnect PCM connector and check PCM connector for damage or pulled out terminals or corrosion. Repair as necessary. If PCM connector is okay, check for continuity between transaxle harness connector terminal "G" and PCM harness connector terminal 2H. See Figure and Figure . If continuity exists, leave transaxle connector disconnected and go to step  4. If continuity does not exist, repair open in affected circuit between PCM and transaxle.
  3. Check pressure control solenoid connector for damage or pulled out terminals or corrosion. Repair as necessary. If pressure control solenoid connector is okay, measure resistance between chassis ground and pressure control solenoid terminal "A". If resistance is 9-18 ohms, replace transaxle internal harness. If resistance is not 9-18 ohms, replace faulty pressure control solenoid.
  4. Turn ignition on. Using a DVOM, check for voltage between chassis ground and transaxle 10-pin harness connector terminal "G". See Figure. If voltage is present, repair short to ground in affected circuit between PCM and transaxle. If voltage is not present, turn ignition switch to OFF position and check for continuity between chassis ground and PCM harness connector terminal 2H. See Figure. If continuity exists, repair short to ground in affected circuit between PCM and transaxle. If continuity does not exist, check connectors, terminals and wiring harnesses for intermittent concern
  5. Start engine. Road test vehicle in first gear with gearshift lever in "D" position. Determine if DTC P0745 is still present. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If serviced DTC resets, replace PCM. If DTC does not reset, repair is complete.
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