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Diagnostic Test

  1. 1) OTHER DTCS PRESENT 

    With the scan tool, read 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 L/R CLUTCH VOLUME INDEX 

    With the scan tool, erase DTCs.

    Start the engine and warm the transmission.

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

    Drive the vehicle and perform at least ten 3-1 manual downshifts at closed throttle from speeds of about 32 Km/h or 20 mph.

    With the scan tool, read the L/R CL VOL INDEX.

    Is the L/R CL VOL INDEX below 20? 

    Yes 

    1. Go to  3).

    No 

    1. Go to  5).
  3. 3) L/R 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 L/R accumulator springs.

    Look for possible leak paths into the L/R 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 L/R CLUTCH CIRCUITS 

    Perform an air check on the L/R Clutch circuit per the Service Information.

    Watch and listen for L/R Clutch piston movement.

    Does the L/R piston stroke and return properly? 

    Yes 

    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 .

    No 

    1. Repair internal transmission as necessary. Pay attention to the components related to the L/R clutch. A broken or weak L/R clutch return spring, Accumulator Spring, and/or dislocated snap ring could cause this problem.
    2. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST .
  5. 5) VERIFY PCM OPERATION 
    NOTE: The TRANS TEMP DEG must be at least 43° C (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 Km/h 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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