Jump to content
  • P0753 Transmission 3-4 Shift Solenoid / Transmission Relay Circuits

       (0 reviews)

    DTC P0753: TRANSMISSION 3-4 SHIFT SOLENOID/TRANSMISSION RELAY CIRCUITS

    Circuit Description

    Circuit is monitored continuously while ignition is on. DTC sets if voltage detected on 3-4 shift solenoid control circuit at the PCM does not match expected voltage.

    Possible CauseP0753 Trans 3-4 Shift Solenoid / Trans Relay Circuits

    The following items may be area of concern:

    • Transmission 3-4 solenoid wiring harness defective.
    • 3-4 shift control solenoid circuit shorted to ground.
    • Solenoid and harness assembly defective.
    • Transmission control relay output circuit open.
    • Transmission control relay output circuit shorted to ground.
    • PCM defective.
    • DTC P1765 is set.
    • 3-4 shift control solenoid circuit open or shorted to voltage.

    Diagnostic Procedure

    1. Using scan tool, read DTCs. If good trip counter for DTC P0753 is not displayed or displayed count is not zero, go to step 16 . If good trip counter is displayed and displayed count is zero, go to next step.

    2. Using scan tool, read DTCs. If DTC P1765 is also set, see DTC P1765: TRANS 12-VOLT SUPPLY RELAY CNTRL CIRCUIT . If DTC P1765 is not set, go to next step.

    3. Using scan tool, read transmission DTCs. If DTC P0743, P0748 and P0753 are present, go to next step. If DTC P0743, P0748 and P0753 are not present, go to step 8 .

    4. Turn ignition off. Disconnect transmission solenoid harness connector. Inspect connector and terminals for damage. Repair as necessary. Turn ignition on. Using test light connected to ground, check fused transmission control relay output circuit at transmission solenoid connector terminal No. 1. If test light illuminates brightly, replace transmission solenoid assembly (internal transmission harness). See REMOVAL & INSTALLATION in appropriate AUTOMATIC article in TRANSMISSIONS SERVICING. If test light does not illuminate, or does not illuminate brightly, go to next step.

    5. Turn ignition off. Remove transmission control relay from underhood Power Distribution Center (PDC) or Integrated Power Module (IPM), as applicable or Integrated Power Module (IPM), as applicable. Turn ignition on. Using test light connected to ground, check fused B+ circuit at transmission control relay connector terminal No. 30 (terminal C3 on AB body). If test light illuminates brightly, remove test light and go to next step. If test light does not illuminate, or does not illuminate brightly, repair circuit for open. If fuse is open, ensure to check for short to ground or high resistance in fused B+ circuit.

    6. Turn ignition off. Measure resistance between ground and fused transmission control relay output circuit at transmission solenoid connector terminal No. 1. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair relay output circuit for short to ground.

    7. Using fused jumper wire, jumper fused B+ circuit (terminal No. 30 (terminal C3 on AB body) and transmission control relay output circuit (terminal No. 87 (terminal C5 on AB body) together at transmission control relay connector. See WIRING DIAGRAMS . Turn ignition on. Using test light connected to ground, check fused transmission control relay output circuit at transmission solenoid connector terminal No. 1. If test light illuminates brightly, replace transmission control relay. If test light does not illuminate, or does not illuminate brightly, repair relay output circuit for open. If fuse is open, ensure to check for short to ground or high resistance in relay output circuit.

    8. Turn ignition off. Disconnect PCM harness connector C2 (White) and transmission solenoid harness connector. Measure resistance of 3-4 shift solenoid control circuit between PCM harness connector C2 (White) terminal No. 21 and transmission solenoid harness connector terminal No. 6. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair 3-4 shift solenoid control circuit for open.

    9. Measure resistance between ground and 3-4 shift solenoid control circuit at PCM harness connector C2 (White) terminal No. 21. If resistance is less than 5 ohms, repair 3-4 shift solenoid control circuit for short to ground. If resistance is 5 ohms or more, go to next step.

    10. Turn ignition on. Measure voltage of 3-4 shift solenoid control circuit. If voltage is more than .5 volt, repair 3-4 shift solenoid control circuit for short to voltage. If voltage is .5 volt or less, go to next step.

    11. Turn ignition off. Measure resistance between 3-4 shift solenoid control circuit and all other circuits at transmission solenoid connector. If resistance is less than 100 k/ohms between 3-4 shift solenoid control circuit and any other circuit, repair circuit as necessary. If resistance is 100 k/ohms or more, go to next step.

    12. Ensure ignition is off. Remove transmission control relay from underhood Power Distribution Center (PDC) or Integrated Power Module (IPM), as applicable. Measure resistance of 3-4 shift solenoid control circuit between fused transmission control relay output circuit at transmission solenoid connector terminal No. 1 and PCM harness connector C2 (White) terminal No. 21. If resistance is 25-60 ohms, go to next step. If resistance is not 25-60 ohms, replace transmission solenoid assembly (internal transmission harness). See REMOVAL & INSTALLATION in appropriate SERVICING article in AUTOMATIC TRANSMISSIONS.

    13. Measure resistance between ground and 3-4 shift solenoid control circuit at transmission solenoid connector terminal No. 6. If resistance is less than 5 ohms, repair short to ground in transmission solenoid assembly. If resistance is 5 ohms or more, go to next step.

    14. Measure resistance between 3-4 shift solenoid control circuit and governor pressure solenoid control circuit at PCM harness connector C2 (White) terminals No. 8 and 21. Resistance should be 28-68 ohms. Measure resistance between TCC solenoid control circuit and 3-4 shift solenoid control circuit at PCM harness connector C2 (White) terminals No. 11 and 21. Resistance should be 50-120 ohms. If resistance for both measurements is within specification, go to next step. If resistance is not as specified, replace transmission solenoid assembly (internal transmission harness). See REMOVAL & INSTALLATION in appropriate SERVICING article in AUTOMATIC TRANSMISSIONS.

    15. Measure resistance between 3-4 shift solenoid control circuit and all other transmission solenoid assembly circuits at appropriate PCM harness connector terminals. See WIRING DIAGRAMS . If resistance is less than 100 k/ohms between 3-4 shift solenoid control circuit and any other circuit, replace transmission solenoid assembly. If resistance is 100 k/ohms or more, replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE.

    16. Conditions required to set DTC are not currently present. Inspect all applicable connectors and terminals for damage. Repair as necessary. If connectors and terminals are okay, see INACTIVE DTC CONDITION under SELF-DIAGNOSTIC SYSTEM. Testing is complete.


    User Feedback

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.
    Note: Your post will require moderator approval before it will be visible.

    Guest

×
×
  • Create New...