P2702-INADEQUATE ELEMENT VOLUME OD

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 DTCs, which indicates an internal transmission problem.

When Monitored:
Whenever the engine is running. The OD clutch volume index (CVI) is updated during a 2-3 upshift with throttle angle between 10 and 54 degrees. Transmission temperature must be at least 43° C (110° F).
Set Condition:
When the OD CVI falls below 5.

Possible Causes

HYDRAULIC LEAK IN THE VALVE BODY

BROKEN OD ACCUMULATOR SPRING

BROKEN OD/REV PISTON BELLEVILLE SPRING OR DISLODGED SNAP RING

INTERNAL LEAKAGE IN PUMP ASSEMBLY

TRANSMISSION SOLENOID/TRS ASSEMBLY

POWERTRAIN 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.

Go To 2

2.CHECK THE OD CLUTCH VOLUME INDEX

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

Is the OD CL VOL INDEX below 10?

Yes

Go To 3

Go To 5

3.OD CLUTCH CIRCUIT LEAKS IN THE VALVE BODY

Were any problems found?

Yes

Repair as necessary.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

Go To 4

4.AIR CHECK OD CLUTCH CIRCUIT

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

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.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

Replace the Transmission/TRS Solenoid Assembly per the service information. With the scan tool, perform Quick Learn.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

5.VERIFY PCM OPERATION

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

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

Yes

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.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

Test Complete.