P2700-INADEQUATE ELEMENT VOLUME LR

For a complete wiring diagram Refer to Section 8W.

Theory of Operation


The volumes of the transmission fluid needed to apply the friction elements are continuously monitored and learned for adaptive controls. As the clutch friction material wears, the volume of fluid needed to apply the clutch increases. Certain transmission mechanical problems can cause near-zero learned volumes resulting in setting a DTC. The DTC will usually set with other DTC's, which indicates an internal transmission problem.


  • When Monitored:

    Whenever the engine is running. The LR clutch volume index (CVI) is updated during a 3-1 or 2-1 manual downshift with throttle angle below 5 degrees. Transmission temperature must be at least 43° C (110° F).

  • Set Condition:

    When the LR clutch volume index (CVI) falls below 16.


Possible Causes
  
HYDRAULIC LEAK IN THE VALVE BODY
 
BROKEN L/R CLUTCH PISTON RETURN SPRING OR SPRING RETAINERS
  
BROKEN L/R ACCUMULATOR SPRING(S)
  
TRANSMISSION SOLENOID/TRS ASSEMBLY
  
TRANSMISSION CONTROL MODULE
  

Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)



Diagnostic Test

1.OTHER DTCS PRESENT



Are there any Pressure Switch Sense circuit DTCs present also?

Yes
  • Refer to the Transmission category and perform the appropriate symptom.


No
  • Go To 2

2.CHECK LR CLUTCH VOLUME INDEX



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





Is the LR CL VOL INDEX below 20?

Yes
  • Go To 3


No
  • Go To 5

3.L/R CLUTCH CIRCUIT LEAKS IN THE VALVE BODY







Were any problems found?

Yes


No
  • Go To 4

4.AIR CHECK L/R CLUTCH CIRCUITS




Does the L/R piston stroke and return properly?

Yes


No

5.VERIFY TCM OPERATION

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







Are any of the CVI's less than 5 or different than before the BATTERY DISCONNECT?

Yes
  • Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. With the scan tool, perform QUICK LEARN.
  • Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)


No
  • Test Complete.