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Diagnostic Test

  1. 1) OTHER DTCS PRESENT 

    With the scan tool, check DTCs.

    Are there any Pressure Switch Sense circuit DTCs present also? 

    Yes 

    1. Refer to the DIAGNOSTIC CODE INDEX  table and perform the appropriate symptom.

    No 

    1. Go to  2).
  2. 2) CHECK THE OD CLUTCH VOLUME INDEX 

    With the scan tool, erase DTCs.

    NOTE: The TRANS TEMP DEG must be at least 43° C (110° F) before performing the following steps.

    Drive the vehicle and perform at least ten 2-3 upshifts with the TPS degree between 10 and 54.

    With the scan tool, read the OD CL VOL INDEX.

    Is the OD CL VOL INDEX below 10? 

    Yes 

    1. Go to  3).

    No 

    1. Go to  5).
  3. 3) OD CLUTCH CIRCUIT LEAKS IN THE VALVE BODY 

    Turn the ignition off to the lock position.

    Remove the transmission oil pan per the Service Information.

    Remove the valve body per the service information.

    Check condition of the OD accumulator spring.

    Look for possible leak paths into the OD clutch hydraulics circuit within the valve body.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST .

    No 

    1. Go to  4).
  4. 4) AIR CHECK OD CLUTCH CIRCUIT 

    Perform an air check on the OD Clutch circuit per the Service Information.

    Watch and listen for OD Clutch piston movement.

    Air check all other pump passages and watch for air leakage into the OD clutch passage.

    NOTE: There is a bleed orifice between the OD and Reverse Clutch passages, so a small amount of air leakage from Reverse to OD is normal.

    Were any problems found? 

    Yes 

    1. Repair internal transmission. Pay attention to the OD Clutch. Broken or weak return spring or a dislocated snap ring could cause this problem. If no problems were found in the OD clutch, or if leakage into the OD passage was noted, replace Pump Assembly per the Service Information.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST .

    No 

    1. Replace the Transmission/TRS Solenoid Assembly per the Service Information. With the scan tool, perform Quick Learn.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST .
  5. 5) VERIFY PCM OPERATION 
    NOTE: The TRANS TEMP DEG must be at least 43° C or 110° F before performing the following steps.

    Perform eight learnable starts. A learnable start is defined as follows: Start engine. From a standstill, accelerate lightly to 80 Kmh or 50 MPH, then brake lightly to a stop. Turn off engine.

    With the scan tool, record the CL VOL INDEX (CVI) for all clutches.

    With the scan tool, perform a BATTERY DISCONNECT.

    With the scan tool, read the CVIs and compare them to the readings recorded before the BATTERY DISCONNECT.

    Are any of the CVIs less than 5 or different than before the BATTERY DISCONNECT? 

    Yes 

    1. Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the PCM per the Service Information. With the scan tool, perform Quick Learn.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST .

    No 

    1. Test Complete.
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