Powertrain Control Module (PCM) - Electrical Diagnostics - 68RFE Automatic Transmission: Diagnosis RAM Pickup 3500

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Test

1. HIGH TEMPERATURE OPERATION This DTC is an informational DTC designed to aid the Technician in diagnosing shift quality complaints. This DTC indicates that the transmission has been operating in the "Overheat" shift schedule which may generate a customer complaint. The customer driving patterns may indicate the need for an additional transmission oil cooler. Verify proper Engine cooling system operation which would affect proper transmission operation. Verify proper torque converter clutch operation. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Repair Repair the cause of transmission overheating. Refer to the Service Information for the proper repair procedure. Make sure to check for any Service Bulletins pertaining to this problem. Refer to «Diagnosis and Testing»(ref-457792-S26721215612012030200000) . Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

Scheme 1058

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. CONTROL MODULE PROGRAMMING ERROR NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain management. With the scan tool. Record the vehicles controller part number. Select Use Controller Part Number under the Flash Tab. Flash the controller with the correct software. Verify the controller flashed successfully. Test Complete Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK WIRING AND CONNECTORS FOR INTERMITTENT OPERATION 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. Wiggle the wires while checking for shorted and open circuits. Check for any Service Bulletins that may apply. Were there any problems found? Yes Repair the power and/or ground circuits to the PCM as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK WIRING AND CONNECTORS FOR INTERMITTENT OPERATION 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. Wiggle the wires while checking for shorted and open circuits. Check for any Service Bulletins that may apply. Were there any problems found? Yes Repair the power and/or ground circuits as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK THE WIRING AND CONNECTORS 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. Wiggle the wires while checking for shorted and open circuits. Check for any Service Bulletins that may apply. Were there any problems found? Yes Repair the power and/or ground circuits as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

Scheme 1059

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. CHECK TO SEE IF P0706 DTC IS CURRENT With the scan tool, perform the Shift Lever Position Test. Select the test outcome from the following: Test passes: Go To 6 . Test fails with Error Code: Go To 2 . Test fails without Error Code: Perform the Gearshift Adjustment Procedure in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
2. CHECK THE TRANSMISSION SOLENOID/TRS ASSEMBLY Turn the ignition off to the lock position. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install Transmission Simulator (special tool #8333A, Simulator, Transmission). Ignition on, engine not running. With the scan tool, perform the Shift Lever Position Test. When the scan tool instructs you to put the Gear Selector in a particular position, you must do so using the selector switch on the Transmission Simulator. The LED for the gear position in question must be illuminated on the Transmission Simulator prior to pressing "ENTER" on the scan tool. NOTE: When the scan tool requests the O/D off button be depressed, you must use the TOW/HAUL button in the vehicle or you will fail the Shift Lever Position Test with an error code 11 or OD-TOW/HALL STUCK OPEN. NOTE: If the Shift Lever Position test fails, make sure to note the identification of the TRS Signal circuit for future reference. Did the Shift Lever Position test pass? Yes Remove the Oil Pan and Main Valve Body Assembly in accordance with the Service Information. Check for metal debris on top of the Solenoid/TRS Assembly and the manual valve code plate. If debris is present, determine the cause of the debris and repair the transmission as necessary. If no problems are found, replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 3 .
3. TRS SIGNAL CIRCUIT OPEN Turn the ignition off to the lock position. Disconnect the Transmission Simulator, Miller tool #(special tool #8333A, Simulator, Transmission). Disconnect the PCM C2 harness connector. Measure the resistance of the identified (T1, T2, T3, T41, or T42) TRS Signal circuit, from the Transmission Solenoid/TRS Assembly harness connector to the appropriate terminal of the PCM C2 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the identified (T41, T42, T3, T1, or T2 (C1-C5) TRS Signal circuit for an open. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 4 .
4. TRS SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the identified (T41, T42, T3, T1, or T2 (C1-C5) TRS Signal circuit. Is the resistance below 5.0 Ohms? Yes Repair the identified (T41, T42, T3, T1, or T2 (C1-C5) TRS Signal circuit for a short to ground. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 5 .
5. TRS SIGNAL CIRCUIT SHORTED TO OTHER CIRCUITS Measure the resistance between the identified (T1, T2, T3, T41, or T42) TRS Signal circuit and all other circuits in the Transmission Solenoid/TRS Assembly harness connector. Is the resistance below 100k Ohms between the identified (T41, T42, T3, T1, or T2 (C1-C5) TRS Signal circuit and any other circuit(s) in the Transmission Solenoid/TRS Assembly harness connector? Yes Repair the identified (T41, T42, T3, T1, or T2 (C1-C5) TRS Signal circuit for a short to other circuit(s). Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
6. CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for shorted and open circuits. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

Scheme 1060

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. DETERMINE IF RELATED DTCS ARE PRESENT With the scan tool, read DTCs. Are there any other Transmission Temperature Sensor DTCs present? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK IF THE DTC IS CURRENT With the scan tool, read DTCs. Is the status Active or is the Starts Since Set counter 2 or less for this DTC? Yes Go To 3 . No Go To 4 .
3. TRANSMISSION TEMPERATURE SENSOR Turn the ignition off to the lock position. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Ignition on, engine not running. With the Transmission Simulator, turn the Input/Output switch to OFF. With the scan tool, monitor the TRANS TEMP VOLTS while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator. Compare the scan tool readings to the voltage readings listed on the Transmission Simulator. Do the readings on the scan tool match the Transmission Simulator readings ± 0.2 of a volt? Yes Replace Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No 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 and program the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
4. CHECK THE WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorted and open circuits. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. CHECK FOR RELATED DTCS With the scan tool, read DTCs. Are there any line pressure sensor or throttle position sensor DTCs present? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK IF THE DTC IS CURRENT With the scan tool, read DTCs. Is the status Active or is the Starts Since Set counter 2 or less for this DTC? Yes Go To 3 . No Go To 4 .
3. TRANSMISSION TEMPERATURE SENSOR Turn the ignition off to the lock position. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Ignition on, engine not running. With the Transmission Simulator, turn the Input/Output switch to OFF. With the scan tool, monitor the Transmission Temperature voltage while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator. Compare the scan tool readings with the numbers listed on the Transmission Simulator. Do the readings on the Transmission Simulator match a non-fluctuating scan tool reading ± 0.2 of a volt? Yes Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
4. CHECK THE WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorted and open circuits. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. CHECK FOR RELATED DTCS With the scan tool, check for other transmission DTCs If any of these DTCs are present, perform their respective tests first. Are there any Transmission solenoid, line pressure, speed sensor, and/or loss of prime DTCs present? Yes If any of these DTCs are present, they may cause a Speed Ratio Error. Perform the test for P0944 first if it is present. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 2 .
2. CHECK THE EVENT DATA With the scan tool, read and record the Event Data. NOTE: Make sure to record all Event Data stored in the scan tool for future reference in this test procedure. Does the Event Data display information for the DTC P0729? Yes Go To 4 . No Go To 3 .
3. CHECK THE TARGET GEAR In the Event Data recorded earlier, does the Event Data show the DTC P1790, with Target gear = 6th, or with both the 2C and OD clutches applying? Yes Go To 4 . No Go To 6 .
4. CHECK INPUT RPM In the Event Data recorded earlier, does the Input RPM read zero? Yes Perform the diagnostic procedure for P0716-Input Speed Sensor Circuit Performance. Diagnose the DTC as if it is set and current. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 5 .
5. CHECK LINE PRESSURE READING In the Event Data recorded earlier, is the line pressure reading more than 10 psi below the desired line pressure reading? Yes Remove the Transmission Oil pan and check the Transmission Oil filter for improper installation or plugged, if Primary oil filter is OK, check the main regulator valve in pump. If excessive debris is in the oil pan, check clutches and repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 6 .
6. CHECK TRANSMISSION FOR SLIPPAGE Erase DTCs and road test the vehicle. Check the transmission operation in reverse and all forward gears. During the road test, was there any obvious slippage noted in any gear, or did the transmission fail to make a 1-2 upshift? Yes Go To 8 . No Go To 7 .
7. CHECK IF THE DTC RESETS With the scan tool, check for Transmission DTCs after the road test. Did the DTC P0729 reset? Yes Go To 8 . No Test Complete. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
8. CHECK INTERNAL TRANSMISSION Remove the Transmission Oil Pan and Valve Body, in accordance with the Service Information, and check for the following: Excessive clutch and or metal debris in the oil pan. If the accumulator cover is intact and the 2C tower seal is not cut or split. OD and 2C accumulator pistons for cracks or cut seals. Solenoid Switch Valve and its plugs for stickiness or wear. Cut or missing No. 5, No. 6, or No. 7 check ball. OD bleed orifice (on top of the main valve body) is intact. Air check the OD and 2C hydraulic clutch circuits for excessive leakage. Refer to the Service information. NOTE: Both the OD and 2C hydraulic clutch circuits contain a small bleed orifice. A small amount of air leakage is considered normal. The OD hydraulic clutch circuit bleed orifice connects to the Reverse input clutch hydraulic cavity. A small amount of air leakage into the Reverse hydraulic clutch circuit is considered normal. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. NOTE: If the OD or 2C clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve or any other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 9 .
9. CHECK ROAD TEST RESULTS During the road test, were Reverse, 1st, 2nd, and 3rd gears OK, but the transmission slipped in 4th, 5th, and 6th gears? Yes Go To 10 . No Go To 11 .
10. CHECK THE OD SHAFT AND REVERSE CARRIER SPLINE Remove the Transmission in accordance with the Service Information and inspect the OD shaft and its spline to the reverse carrier hub. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Disassemble and inspect the input clutch assembly. Check the OD and Reverse clutch seals, discs, and bleed orifice (in the OD/Reverse clutch piston) and repair as necessary in accordance with the Service Information. NOTE: If the OD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve, etc.), replace the Transmission Solenoid/TRS Assembly in addition to any other necessary repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
11. CHECK FOR FAILED REVERSE GEARSET SPLINES Working through the windows in the bottom of the case, check for a failed Reverse Sun or Annulus gear spline as follows: Hold the Transmission Output Shaft by holding the Transmission Manual Lever in the park position. Apply the 4C clutch using 30-40 psi shop air at the apply port in the center bulkhead. Attempt to rotate the input annulus gear and drive shell (the drum that encloses the two rearmost gearsets). NOTE: Due to the overrunning clutch, the gear and drive shell normally rotates in one direction only. Can the drive shell be rotated? Yes Repair internal transmission as necessary in accordance with the Service Information. Check the reverse annulus gear spline to the input carrier, and the reverse sun gear spline to the reaction carrier hub. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace Transmission Solenoid/TRS Assembly in accordance with the Service Information and perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . NOTE: If continued slippage is noted in 2nd and/or 6th gear during the verification test, remove the transmission and inspect the 2C clutch and repair as necessary in accordance with the Service Information.

1. CHECK FOR RELATED DTCS With the scan tool, read DTCs. If any of these DTCs are present, perform their respective tests first. Are there any Transmission solenoid, line pressure, speed sensor, and/or loss of prime DTCs present? Yes If any of these DTCs are present, they may cause a Speed Ratio Error. Perform the test for P0944 first if it is present. and perform the appropriate diagnostic procedure. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 2 .
2. CHECK THE L/R CLUTCH STATE Start the vehicle, with the brakes firmly applied and the vehicle stationary, place the shift lever in Drive. Using the scan tool, check the L/R Clutch State. Did the L/R Clutch state read Applied? Yes Go To 4 . No Go To 3 .
3. CHECK THE POWERTRAIN CONTROL MODULE Turn the ignition off to the lock position for at least 30 seconds. Again, start the vehicle, with the brakes firmly applied and the vehicle stationary, place the shift lever in Drive. Using the scan tool, check the L/R Clutch State. Did the L/R Clutch state read Applied? Yes Go To 4 . No 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 and program the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
4. CHECK FOR SLIPPAGE IN 1ST GEAR With the scan tool, perform the 1st Gear Clutch Test. Follow the instructions on the scan tool. Increase the throttle angle or TPS Degree to 30° for no more than a few seconds. CAUTION: Do not overheat the transmission. Did the Clutch Test pass, Input Speed remain at zero? Yes Go To 6 . No Go To 5 .
5. CHECK THE OVERRUNNING CLUTCH With the scan tool, monitor the L/R Clutch state while launching the vehicle from a stop in 1st gear. Does the transmission slip (neutral out) when the L/R Clutch state changes to Not Applied? Yes Remove transmission and inspect for failed overrunning clutch (rotates in both directions). Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 7 .
6. CHECK FOR INTERMITTENT OPERATION The conditions to set this DTC are not currently present. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. If the Event Data shows fault P0731 was set in Park, Reverse, or Neutral, replace the Powertrain Control Module. If the Event Data shows fault P0731 set with input RPM = zero, check the input speed sensor and related wiring. If the Event Data shows fault P0731 set with line pressure significantly below desired line pressure, check for the cause of low line pressure (i.e., oil level, mis-installed or damaged primary filter or filter seal, sticking main regulator valve in pump, etc.). If the Event Data shows fault P0731 set with the UD pressure switch open (but line pressure matches Desired Line Pressure), air check the UD hydraulic clutch circuit for leakage in accordance with the Service Information. If the UD hydraulic clutch circuit is OK, replace the solenoid/TRS assembly. Check the gearshift linkage adjustment. Intermittent Gear Ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Wiggle wiring and connectors while checking for intermittent operation with the Transmission Simulator. Gear ratio DTCs can also be set under extreme temperature conditions. Verify if the problem is only experienced under extreme hot or cold conditions. Were there any problems found. Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test complete.
7. CHECK INTERNAL TRANSMISSION Repair internal transmission as necessary. Refer to the Service Information. If there were any line pressure DTCs present along with this DTC, make sure to inspect the: Primary oil filter and seal, Transmission Oil Pump, and the Main regulator valve in accordance with the Service Information. If DTCs P0876 and/or P0875 were present in addition to the P0731, replace the Transmission Solenoid/TRS Assembly in addition to necessary internal repairs. Pay particular attention to the following list of possible causes when repairing the transmission: Cut UD piston seal Failed overrunning clutch Burned UD clutch Cut UD accumulator seal ring Broken UD accumulator piston Low line pressure Broken/missing main valve body bleed orifice Broken/missing dribbler orifice assembly in reaction shaft support Poor machining on pump valve body face Transmission Solenoid/TRS Assembly Repair NOTE: If the UD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, low line pressure in Event Data, or other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Repair internal transmission in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK FOR RELATED DTCS With the scan tool, check for other transmission DTCs. Are there any Transmission solenoid, line pressure, speed sensor, and/or loss of prime DTCs present? Yes Perform the test for P0944-LOSS OF PRIME first if it is present. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 2 .
2. CHECK IF DTC IS CURRENT With the scan tool, read and record the Event Data. NOTE: Make sure to record all Event Data stored in the scan tool for future reference in this test procedure. Does the Event Data display information for the DTC P0732? Yes Go To 4 . No Go To 3 .
3. CHECK THE EVENT DATA In the Event Data, identify the DTC that was recorded earlier. In the Event Data recorded earlier, does the Event Data display information for the DTC P1790, with target gear = 2nd, or with both 2C and UD clutches applying? Yes Go To 4 . No Go To 7 .
4. CHECK RPM IN EVENT DATA In the Event Data recorded earlier, does the Input RPM read zero? Yes Check the input speed sensor and wiring. Refer to test P0716 and diagnose as if the DTC is current. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 5 .
5. CHECK LINE PRESSURE READING In the Event Data recorded earlier, is the line pressure reading more than 10 psi below the desired line pressure? Yes Go To 6 . No Go To 7 .
6. CHECK TRANSMISSION OIL FILTER Turn the ignition off to the lock position. Remove and inspect the Transmission Oil Pan for excessive debris in accordance with the Service Information. Remove and inspect the Primary Oil Filter in accordance with the Service Information. NOTE: Make sure the Primary Transmission Oil Filter and seal are properly installed and are not cracked or split. Does the Oil Pan contain excessive debris and/or is the Primary Oil Filter cracked, plugged or mis-installed? Yes Repair the plugged, cracked, or split Primary Transmission Oil Filter and/or seal. If excessive clutch debris is present, check the clutches for damage. Refer to the Service Information for the proper hydraulic clutch repair procedure. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Remove the Transmission Oil Pump in accordance with the Service Information. Check the main Regulator Valve for sticking in its bore, scoring, and/or damage and clean and repair as necessary. If no problem is found, replace the Transmission Solenoid/TRS Assembly. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
7. CHECK IF THE DTC P0732 IS CURRENT With the scan tool, perform the 2nd Gear Clutch Test. Follow the instructions on the scan tool. Increase the throttle angle, TPS Degree, to 30° for no more than a few seconds. CAUTION: Do not overheat the transmission. NOTE: If the 2C clutch is faulty, the overrunning clutch will hold and the slip test will pass. The 2nd gear clutch test will not detect a faulty 2C clutch. However, it will detect a faulty UD clutch. Did the clutch test pass, did the Input Speed remain at zero? Yes Go To 8 . No Go To 10 .
8. CHECK FOR INTERMITTENT OPERATION Check the Shifter adjustment in accordance with the Service Information. Intermittent gear ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Check the Speed Sensor wiring and connectors for good connection, then perform a wiggle test using the Transmission Simulator (special tool #8333A, Simulator, Transmission). Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 9 .
9. CHECK FOR SLIPPAGE With the scan tool, erase Transmission DTCs. Road test the vehicle. Does the Transmission fail to make a 1-2 upshift (stays in 1st gear and then shifts to direct gear), or is there obvious slippage noticed in 2nd gear? Yes Go To 12 . No Go To 16 .
10. CHECK THE UD HYDRAULIC CLUTCH CIRCUIT Remove Transmission Oil Pan and check for excessive debris. Remove the Valve Body and air check the UD hydraulic clutch circuit (in the case) in accordance with the Service Information. NOTE: The UD clutch passage contains a small bleed orifice, a small amount of air leakage is normal. Were there any problems found, excessive debris and/or excessive air leakage in the UD clutch hydraulic circuit? Yes Repair as necessary. Check the UD clutch piston seals, reaction shaft support seal rings and the dribbler assembly, and the flatness of the pump valve body and pump housing faces. Check main regulator valve for sticking in the bore. NOTE: If the UD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, low line pressure in Event Data, or any other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 11 .
11. CHECK THE UD ACCUMULATOR PISTON Check the UD bleed orifice, accumulator piston, and accumulator piston seal in the main valve body. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
12. CHECK FOR EXCESSIVE DEBRIS Remove the Transmission Oil Pan and check for excessive debris. If grey sludge is present, check for a improperly assembled 2C clutch with the thick reaction plate not against the case. Remove the valve body and air check the 2C hydraulic clutch circuit (in the 2C/4C clutch retainer) in accordance with the Service Information. NOTE: The 2C clutch passage contains a small bleed orifice, a small amount of air leakage is normal. Were there any problems found, excessive debris, improperly assembled 2C clutch and/or excessive air leakage in the 2C hydraulic clutch circuit? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Note: Check the 2C piston seals and bleed orifice. NOTE: If the 2C clutch has failed but no obvious cause is found (such as a cut piston seal, cut tower seal, stuck regulator valve, etc.) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 13 .
13. CHECK THE 2C ACCUMULATOR Check the 2C Accumulator piston for cracks or a cut seal. Check for a cut or missing No. 7 or No. 5 check ball. Check the Solenoid Switch Valve and its plugs for sticking in its bore or excessive wear. Were there any problems found Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 14 .
14. CHECK FOR FAILED REVERSE GEARSET SPLINES Working through the windows in the bottom of the case, check for a failed Reverse Sun or Annulus spline as follows: Hold the Transmission Output Shaft by holding the Transmission Manual Lever in the park position. Apply the 4C clutch using 30-40 psi shop air at the apply port in the center bulkhead. Attempt to rotate the input annulus gear and drive shell (the drum that encloses the two rearmost gearsets). NOTE: Due to the overrunning clutch, the gear and drive shell normally rotates in one direction only. Can the drive shell be rotated? Yes Repair internal transmission as necessary in accordance with the Service Information. Check the reverse annulus gear spline to the input carrier, and the reverse sun gear spline to the reaction carrier hub. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 15 .
15. CHECK THE DRIVE SHELL WELD Release the output shaft and the 4C clutch. Apply the L/R Clutch only using 30-40 psi of shop air. Attempt to rotate the drive shell as in the previous step. Can the drive shell be rotated? Yes Repair Transmission as necessary in accordance with the Service Information. Check the drive shell weld to input annulus gear. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
16. CHECK IF DTC RESETS Did the DTC P0732 reset during the road test? Yes Go To 17 . No Go To 18 .
17. LIST OF POSSIBLE CAUSES If any other DTCs set during the road test, refer to the appropriate symptom in the Transmission Service Information. If no other DTCs set during the road test, below is a list of possible causes, but not strictly limited to those: Check for excessive debris in the Transmission Oil pan, plugged, cracked, or misinstalled Primary Transmission Oil Filter and/or seal. Check for cut and/or missing No. 7 and No. 5 check balls in the main valve body. Check the 2C and UD accumulator pistons and seals, UD bleed orifice, and the Solenoid Switch Valve and Plugs in the main valve body. Check the UD clutch piston seals, reaction shaft support seal rings and dribbler assembly. Check the 2C clutch piston seals, and bleed orifice. Check the main regulator valve for sticking in its bore and the flatness of the pump valve body and pump housing faces. Check for a improperly assembled 2C clutch with the thick reaction plate not against the case. Repair Repair as necessary. Refer to the Service Information for proper repair procedures. NOTE: If the UD or 2C clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve or any other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
18. INTERMITTENT DTC The conditions to set this DTC are not currently present. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. If the Event Data shows fault P0732 was set in Park, Reverse, or Neutral, replace the Powertrain Control Module. If the Event Data shows fault P0732 set with input RPM = zero, check the input speed sensor and related wiring. If the Event Data shows fault P0732 set with line pressure significantly below desired line pressure, check for the cause of low line pressure (i.e., oil level, misinstalled or damaged primary filter or filter seal, sticking main regulator valve in pump, etc.). If the Event Data shows fault P0732 set with the UD or 2C pressure switch open (but line pressure matches Desired Line Pressure), air check the UD and 2C hydraulic clutch circuits for leakage in accordance with the Service Information. If the UD and 2C hydraulic clutch circuits are OK, replace the Transmission Solenoid/TRS assembly. Check the gearshift linkage adjustment. Intermittent Gear Ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install Transmission Simulator (special tool #8333A, Simulator, Transmission). Wiggle wiring and connectors while checking for intermittent operation with the Transmission Simulator. Gear ratio DTCs can also be set under extreme temperature conditions. Verify if the problem is only experienced under extreme hot or cold conditions. Were there any problems found. Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. DETERMINING IF RELATED DTCS ARE PRESENT With the scan tool, check for other transmission DTCs. Are any Transmission solenoid, line pressure, speed sensor, or loss of prime DTCs present? Yes Perform the test for P0944-LOSS OF PRIME first if it is present. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 2 .
2. CHECK EVENT DATA With the scan tool, read and record the Event Data. NOTE: Make sure to record all Event Data stored in the scan tool for future reference in this test procedure. Does the Event Data display information for the DTC P0733? Yes Go To 3 . No Go To 6 .
3. CHECK RPM IN THE EVENT DATA In the Event Data recorded earlier, does the Input RPM read zero? Yes Check the input speed sensor and wiring. Refer to test P0716 and diagnose as if that DTC is current. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 4 .
4. CHECK LINE PRESSURE READING In the Event Data recorded earlier, is the line pressure reading more than 10 psi below the desired line pressure? Yes Go To 5 . No Go To 6 .
5. PLUGGED TRANSMISSION OIL FILTER Turn the ignition off to the lock position. Remove and inspect the Transmission Oil Pan for excessive debris in accordance with the Service Information. Remove and inspect the Primary Oil Filter in accordance with the Service Information. NOTE: Make sure the Primary Transmission Oil Filter and/or seal is not cracked or split. Does the Oil Pan contain excessive debris and/or is the Primary Oil Filter cracked or plugged? Yes Repair the plugged, cracked, or split Primary Transmission Oil Filter and/or seal. If the Primary Transmission Oil Filter is plugged, refer to the Service Information for the proper hydraulic clutch repair procedure. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Remove the Transmission Oil Pump in accordance with the Service Information. Check the main Regulator Valve for sticking in its bore, scoring, and/or damage and clean and repair as necessary. If no problem is found, replace the Transmission Solenoid/TRS Assembly. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
6. CHECK TO SEE IF DTC P0733 IS CURRENT With the scan tool, perform the 3rd Gear Clutch Test. Follow the instructions on the scan tool. Increase the throttle angle, TPS Degree, to 30° for no more than a few seconds. CAUTION: Do not overheat the transmission. NOTE: If the 4C clutch is faulty, the overrunning clutch will hold and the slip test will pass. The 3rd Gear Clutch Test will not detect a faulty 4C clutch. However, it will detect a faulty UD clutch. Did the clutch test pass, did the Input Speed remain at zero? Yes Go To 7 . No Go To 9 .
7. CHECK FOR INTERMITTENT OPERATION Check the Shifter adjustment in accordance with the Service Information. Intermittent gear ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Check the Speed Sensor wiring and connectors for good connection, then perform a wiggle test using the Transmission Simulator (special tool #8333A, Simulator, Transmission). Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 8 .
8. CHECK FOR SLIPPAGE With the scan tool, erase Transmission DTCs. Road test the vehicle. Check the Transmission is Reverse and all forward gears. Is there an obvious slippage noted in any gear? Yes Go To 11 . No Go To 14 .
9. UD CLUTCH HYDRAULIC CIRCUIT Remove Transmission Oil Pan and check for excessive debris. Remove the Valve Body and air check the UD clutch hydraulic circuit (in the case) in accordance with the Service Information. NOTE: The UD clutch passage contains a small bleed orifice, a small amount of air leakage is normal. Were there any problems found, excessive debris and/or excessive air leakage in the UD clutch hydraulic circuit? Yes Repair as necessary. Check the UD clutch piston seals and the dribbler assembly, reaction shaft support seal rings, and the flatness of the pump valve body and pump housing faces. Check main regulator valve for sticking in the bore. NOTE: If the UD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve, etc.) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 10 .
10. UD ACCUMULATOR PISTON Check the UD bleed orifice, accumulator piston, and accumulator piston seal in the main valve body. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 11 .
11. EXCESSIVE DEBRIS Remove the Transmission Oil Pan and check for excessive debris. Remove the valve body and air check the 4C clutch hydraulic circuit in accordance with the Service Information. NOTE: The 4C clutch passage contains a small bleed orifice, a small amount of air leakage is normal. Were there any problems found, excessive debris, improperly assembled 4C clutch and/or excessive air leakage in the 4C clutch hydraulic circuit? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Note: Check the 4C piston seals and bleed orifice. NOTE: If the 4C clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, low line pressure in Event Data, etc.) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 12 .
12. 4C ACCUMULATOR Check the 4C Accumulator piston for cracks or a cut seal. Check for a cut or missing No. 5 check ball. Check the Solenoid Switch Valve and its plugs for sticking in its bore or excessive wear. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 13 .
13. CHECK FOR BROKEN REVERSE SUN GEAR WELD Working through the windows in the bottom of the case, check the failed Reverse or reaction gear set connections follows: Hold the Transmission Output Shaft by holding the Transmission Manual Lever in the park position. Apply the 4C clutch using 30-40 psi shop air at the apply port in the center bulkhead. Attempt to rotate the input annulus gear and drive shell (the drum that encloses the to rearmost gearsets). Note that (due to the overrunning clutch) the gear and drive shell normally rotates in one direction only. Can the drive shell be rotated? Yes Repair Transmission as necessary in accordance with the Service Information. Check the reverse annulus gear spline to the input carrier, the reverse sun gear spline to the reaction carrier hub, and the reaction sun gear weld to the 4C clutch hub. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 17 .
14. CHECK IF DTC RESET Did the DTC P0733 reset during the road test? Yes Go To 15 . No Go To 16 .
15. LIST OF POSSIBLE CAUSES If any other DTCs set during the road test, refer to the appropriate symptom in the appropriate Transmission Diagnostics Information. If no other DTCs set during the road test, below is a list of possible causes, but not strictly limited to those: Check for excessive debris in the Transmission Oil pan, plugged, cracked, or split Primary Transmission Oil Filter and/or seal. Check for cuts or missing No. 5 check ball in the main valve body. Check the 4C and UD accumulator pistons and seals, UD bleed orifice, and the Solenoid Switch Valve and Plugs in the main valve body. Check the UD clutch piston seals, reaction shaft support seal rings, and the flatness of the pump valve body and pump housing faces. Check the 4C clutch piston seals, and bleed orifice. Check the UD clutch piston seals, reaction shaft support seal rings, and dribbler assemblies, and the flatness of the pump valve body and pump housing faces. Repair Repair as necessary. Refer to the Service Information for proper repair procedures. NOTE: If the UD or 4C clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve, or other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
16. INTERMITTENT DTC The conditions necessary to set this DTC are not present at this time. Use the Event Data to help identify the conditions and/or possible causes that may have caused the DTC to set. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Where there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.
17. INTERMITTENT DTC The conditions to set this DTC are not currently present. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. If the Event Data shows fault P0733 was set in Park, Reverse, or Neutral, replace the Powertrain Control Module. If the Event Data shows fault P0733 set with input RPM = zero, check the input speed sensor and related wiring. If the Event Data shows fault P0733 set with line pressure significantly below desired line pressure, check for the cause of low line pressure (i.e., oil level, misinstalled or damaged primary filter or filter seal, sticking main regulator valve in pump, etc.). If the Event Data shows fault P0733 set with the UD or 4C pressure switch open (but line pressure matches Desired Line Pressure), air check the UD and 4C hydraulic clutch circuits for leakage in accordance with the Service Information. If the UD and 4C hydraulic clutch circuits are OK, replace the Transmission Solenoid/TRS assembly. Check the gearshift linkage adjustment. Intermittent Gear Ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install Transmission Simulator (special tool #8333A, Simulator, Transmission). Wiggle wiring and connectors while checking for intermittent operation with the Transmission Simulator. Gear ratio DTCs can also be set under extreme temperature conditions. Verify if the problem is only experienced under extreme hot or cold conditions. Were there any problems found. Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. CHECK IF RELATED DTCS ARE PRESENT With the scan tool, check for other transmission DTCs Are there any Transmission; solenoid, line pressure, speed sensor, and/or loss of prime DTCs present? Yes Perform the test for P0944-LOSS OF PRIME first if it is present. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 2 .
2. CHECK Event Data With the scan tool, read and record the Event Data. NOTE: Make sure to record all Event Data stored in the scan tool for future reference in this test procedure. Does the Event Data display information for the DTC P0734? Yes Go To 4 . No Go To 3 .
3. CHECK THE TARGET GEAR IN Event Data In the Event Data, identify the DTC that was recorded earlier. Does the Event Data display information for the DTC P1790, with target gear = 4th, or with both OD and UD clutches applying? Yes Go To 4 . No Go To 7 .
4. CHECK INPUT RPM IN Event Data Refer to the Event Data recorded earlier. Does the Input RPM read zero? Yes Check the input speed sensor and wiring. Refer to test P0716 and diagnose as if the DTC is current. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 5 .
5. CHECK LINE PRESSURE READING Refer to the Event Data recorded earlier. Is the line pressure reading more than 10 psi below the desired line pressure? Yes Go To 6 . No Go To 7 .
6. CHECK TRANSMISSION OIL FILTER Turn the ignition off to the lock position. Remove and inspect the Transmission Oil Pan for excessive debris in accordance with the Service Information. Remove and inspect the Primary Oil Filter in accordance with the Service Information. NOTE: Make sure the Primary Transmission Oil Filter and seal are properly installed and are not cracked or split. Does the Oil Pan contain excessive debris and/or is the Primary Oil Filter cracked, plugged or mis-installed? Yes Repair the plugged, cracked, or split Primary Transmission Oil Filter and/or seal. If excessive clutch debris is present, check the clutches for damage. Refer to the Service Information for the proper hydraulic clutch repair procedure. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Remove the Transmission Oil Pump in accordance with the Service Information. Check the main Regulator Valve for sticking in its bore, scoring, and/or damage and clean and repair as necessary. If no problem is found, replace the Transmission Solenoid/TRS Assembly. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
7. CHECK FOR CLUTCH SLIPPAGE With the scan tool, perform the Direct Gear Clutch Test. Follow the instructions on the scan tool. Increase the throttle angle, TPS Degree, to 30° for no more than a few seconds. CAUTION: Do not overheat the transmission. NOTE: If the OD clutch is faulty, the overrunning clutch will hold and the slip test will pass. The Direct gear clutch test will not detect a faulty OD clutch. However, it will detect a faulty UD clutch. Did the clutch test pass, did the Input Speed remain at zero? Yes Go To 8 . No Go To 10 .
8. CHECK FOR INTERMITTENT OPERATION Check the Shifter adjustment in accordance with the Service Information. Intermittent gear ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Check the Speed Sensor wiring and connectors for good connection, then perform a wiggle test using the Transmission Simulator (special tool #8333A, Simulator, Transmission). Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 9 .
9. ROAD TEST THE VEHICLE AND CHECK FOR SLIPPAGE With the scan tool, erase Transmission DTCs. Road test the vehicle. Check operation in all forward gears and Reverse. If slippage is detected, check whether the line pressure is more than 10 psi below the desired line pressure reading on the scan tool. Check and record any transmission DTCs. Disconnect the Transmission Solenoid/TRS Assembly harness connector to induce Limp-in. Again test drive the vehicle and check the transmission operation in Drive and Reverse while in Limp-in. Note whether Drive Limp-in provides 1st gear or 4th (direct) gear. Reconnect all disconnected connectors and erase any Transmission DTCs. Perform the appropriate procedure that best describes your road test results: No obvious slippage noted in any gear Go To 15 . Obvious slippage noted in one or more gears, and line pressure (actual) is often more than 10 psi below the Desired Line Pressure reading on the scan tool Go To 6 . Slippage noted in 4th gear and Drive Limp-in provides 1st gear Go To 12 . Slippage noted in Reverse gear and Drive Limp-in provides 1st gear Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . Slippage noted in 4th gear while Drive Limp-in allows 4th gear WITHOUT slippage Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . All other possible conditions Go To 12 .
10. CHECK THE UD HYDRAULIC CLUTCH CIRCUIT Remove Transmission Oil Pan and check for excessive debris. Remove the Valve Body and air check the UD hydraulic clutch circuit (in the case) in accordance with the Service Information. NOTE: The UD clutch passage contains a small bleed orifice, a small amount of air leakage is normal. Were there any problems found, excessive debris and/or excessive air leakage in the UD hydraulic clutch circuit? Yes Repair as necessary. Check the UD clutch piston seals, reaction shaft support seal rings and dribbler assemblies, and the flatness of the pump valve body and pump housing faces. Check main regulator valve for sticking in the bore. NOTE: If the UD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, low line pressure in DTC Event Data, etc.) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 11 .
11. CHECK UD ACCUMULATOR PISTON Check the UD bleed orifice, accumulator piston, and accumulator piston seal in the main valve body. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. No Replace Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
12. CHECK FOR EXCESSIVE DEBRIS Remove the Transmission Oil Pan and check for excessive debris. Remove the valve body and check if the accumulator cover is intact. Air check the OD hydraulic clutch circuit (in the case) in accordance with the Service Information. NOTE: The OD clutch passage contains a small bleed orifice which connects to the Reverse clutch hydraulic circuit, a small amount of air leakage into the Reverse clutch passage is normal. Were there any problems found, excessive debris, and/or excessive air leakage in the OD hydraulic clutch circuit? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Note: Check the bleed orifice in the OD/Reverse clutch piston. NOTE: If the OD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, low line pressure in DTC Event Data, etc.) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 13 .
13. CHECK THE OD ACCUMULATOR Check the OD Accumulator piston for cracks or a cut seal. Check for a cut or missing #6 check ball. Check the Solenoid Switch Valve and its plugs for sticking in its bore or excessive wear. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 14 .
14. CHECK FOR FAILED OD SHAFT/SPLINE Remove the Transmission in accordance with the Service Information and inspect the OD shaft and its spline to the reverse carrier hub. Were there any problems found? Yes Repair as necessary. No Disassemble and inspect the input clutch assembly. Check the OD and Reverse clutch seals, discs, and bleed orifice (in the OD/Reverse clutch piston). Check the OD hub and shaft. Repair as necessary. Refer to the Service Information for proper repair procedures. NOTE: If the OD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve, etc.), replace the Transmission Solenoid/TRS Assembly in addition to any other necessary repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
15. CHECK IF DTC RESETS Did the DTC P0734 reset during the road test? Yes Go To 16 . No Go To 17 .
16. LIST OF POSSIBLE CAUSES If any other DTCs set during the road test, refer to the appropriate symptom in the appropriate Transmission Diagnostic Information. If no other DTCs set during the road test, below is a list of possible causes, but not strictly limited to those. Check for: Excessive debris in the Transmission Oil pan, plugged, cracked, or mis-installed Primary Transmission Oil Filter and/or seal. Cut or missing #6 check ball in the main valve body. OD and UD accumulator pistons and seals and bleed orifices, and the Solenoid Switch Valve and Plugs in the main valve body. OD and UD clutch piston seals, reaction shaft support seal rings and dribbler assemblies, and the flatness of the pump valve body and pump housing faces. Main regulator valve for sticking in its bore. Repair Repair as necessary. Refer to the Service Information for proper repair procedures. NOTE: If the OD or UD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve, or other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
17. CHECK FOR INTERMITTENT OPERATION The conditions to set this DTC are not currently present. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. If the DTC Event Data shows fault P0734 was set in the Park, Reverse, or Neutral, replace the Powertrain Control Module. If the DTC Event Data shows fault P0734 set with input RPM = zero, check the input speed sensor and related wiring. If the DTC Event Data shows fault P0734 set with line pressure significantly below desired line pressure, check for the cause of low line pressure (i.e., oil level, misinstalled or damaged primary filter or filter seal, sticking main regulator valve in pump, etc.). If the DTC Event Data shows fault P0734 set with the OD or UD pressure switch open (but line pressure matches Desired Line Pressure), air check the OD and UD hydraulic clutch circuits for leakage in accordance with the Service Information. If the OD and UD hydraulic clutch circuits are OK, replace the Transmission Solenoid/TRS assembly. Check the gearshift linkage adjustment. Intermittent Gear Ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Wiggle wiring and connectors while checking for intermittent operation with the Transmission Simulator. Gear ratio DTCs can also be set under extreme temperature conditions. Verify if the problem is only experienced under extreme hot or cold conditions. Were there any problems found. Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. CHECK FOR RELATED DTCS With the scan tool, check for other transmission DTCs If any of these DTCs are present, perform their respective tests first. Are there any Transmission solenoid, line pressure, speed sensor, and/or loss of prime DTCs present? Yes If any of these DTCs are present, they may cause a Speed Ratio Error. Perform the test for P0944 first if it is present. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 2 .
2. CHECK THE EVENT DATA With the scan tool, read and record the Event Data. NOTE: Make sure to record all Event Data stored in the scan tool for future reference in this test procedure. Does the Event Data display information for the DTC P0735? Yes Go To 4 . No Go To 3 .
3. CHECK FOR ANOTHER DTC In the Event Data recorded earlier, does the Event Data show the DTC P1790, with Target Gear = 5th, or with both the 4C and OD clutches applying? Yes Go To 4 . No Go To 6 .
4. CHECK THE INPUT RPM In the Event Data recorded earlier, does the Input RPM read zero? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the diagnostic procedure for P0716-Input Speed Sensor Circuit Performance . Diagnose the DTC as if it is set and current. No Go To 5 .
5. CHECK THE LINE PRESSURE READING In the Event Data recorded earlier, is the line pressure reading more than 10 psi below the desired line pressure reading? Yes Remove the Transmission Oil pan and check the Transmission Oil filter for improper installation or plugged, if Primary oil filter is OK, check the main regulator valve in pump. If excessive debris is in the oil pan, check clutches and repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 6 .
6. CHECK TRANSMISSION FOR SLIPPAGE Erase DTCs and road test the vehicle. Check the transmission operation in reverse and all forward gears. During the road test, was there any obvious slippage noted in any gear? Yes Go To 8 . No Go To 7 .
7. CHECK IF THE DTC RESETS With the scan tool, check for Transmission DTCs after the road test. Did the DTC P0735 reset? Yes Go To 8 . No Test Complete.
8. CHECK INTERNAL TRANSMISSION Remove the Transmission Oil Pan and Valve Body in accordance with the Service Information and check for the following: Excessive debris in the oil pan. Remove the Valve Body and check if the accumulator cover is intact and the 4C tower seal is not cut or split. OD and 4C accumulator pistons for cracks and/or cut seals. Solenoid Switch Valve and its plugs for stickiness or wear. Cut or missing No. 5 and/or No. 6 check ball. OD bleed orifice (on top of the main valve body) is intact. Air check the OD and 4C hydraulic clutch circuits for excessive leakage. Refer to the Service information. NOTE: Both the OD and 4C hydraulic clutch circuits contain a small bleed orifice. A small amount of air leakage is considered normal. The OD hydraulic clutch circuit bleed orifice connects to the Reverse input clutch hydraulic cavity. A small amount of air leakage into the Reverse hydraulic clutch circuit is considered normal. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. NOTE: If the OD or 4C clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve or any other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 9 .
9. CHECK ROAD TEST RESULTS Perform the appropriate action for the condition(s) which best describe the road test results: 1st gear was OK. Slipped in 2nd (or failed to make the 1-2 upshift and went into Limp-in) and slipped in Reverse Go To 10 . 1st and 2nd gears were OK. Slipped in 3rd gear AND in Reverse Remove the Transmission in accordance with the Service Information. Inspect the reaction annulus gear weld to the reverse carrier, and the reaction sun gear weld to the 4C clutch hub and repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . 1st and 2nd gears were OK. Slipped in 3rd gear but NOT in Reverse. Replace Transmission Solenoid/TRS Assembly in accordance with the Service Information and perform 68RFE TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . If a continued Slippage is noted in 3rd gear during the Verification test, Remove the Transmission and inspect the 4C clutch and repair as necessary in accordance with the Service Information. 1st through 3rd gears were OK. Slipped in 4th, 5th, or 6th gear. Reverse was OK Go To 11 .
10. CHECK FOR FAILED REVERSE GEARSET SPLINES Working through the windows in the bottom of the case, check for a failed Reverse Sun or Annulus gear spline as follows: Hold the Transmission Output Shaft by holding the Transmission Manual Lever in the park position. Apply the 4C clutch using 30-40 psi shop air at the apply port in the center bulkhead. Refer to «Standard Procedure»(ref-457914-S32742422392012030200000) . Attempt to rotate the input annulus gear and drive shell (the drum that encloses the two rearmost gearsets). NOTE: Due to the overrunning clutch, the gear and drive shell normally rotates in one direction only. Can the drive shell be rotated? Yes Repair internal transmission as necessary in accordance with the Service Information. Check the reverse annulus gear spline to the input carrier, and the reverse sun gear spline to the reaction carrier hub. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
11. CHECK THE OD SHAFT AND REVERSE CARRIER SPLINE Remove the Transmission in accordance with the Service Information and inspect the OD shaft and its spline to the reverse carrier hub. Were there any problems found? Yes Repair as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Disassemble and inspect the input clutch assembly. Check the OD and Reverse clutch seals, discs, and bleed orifice (in the OD/Reverse clutch piston) and repair as necessary in accordance with the Service Information. NOTE: If the OD clutch has failed but no obvious cause is found (such as a cut piston seal, broken seal ring, stuck regulator valve, etc.), replace the Transmission Solenoid/TRS Assembly in addition to any other necessary repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK FOR RELATED DTCS With the scan tool, check for other transmission DTCs. Are there any Transmission solenoid, line pressure, speed sensor, and/or loss of prime DTCs present? Yes Perform the test for P0944-LOSS OF PRIME first if it is present. Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) . No Go To 2 .
2. CHECK IF DTC IS CURRENT NOTE: Make sure to record all Event Data stored in the scan tool for future reference in this test procedure. With the scan tool, perform the Reverse Gear Clutch test. Follow the instructions on the scan tool. Increase the throttle angle, TPS degree, to 30°, for no more than a few seconds. CAUTION: Do not overheat the transmission. Did the clutch test pass, input speed remain at zero? Yes Go To 3 . No Go To 4 .
3. CHECK THE EVENT DATA The conditions necessary to set this DTC are not currently present. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Does the Event Data show an input speed reading of zero? Yes Go To 8 . No Go To 4 .
4. POSSIBLE INTERNAL TRANSMISSION CAUSES Remove the Transmission Oil Pan and Valve Body and check the following in accordance with the Service Information: Clutch or metal debris in the pan L/R clutch tower seal on the main valve body or cuts and the L/R accumulator piston and seals. Air check the Reverse and L/R Hydraulic Clutch circuits (in the case) for excessive air leakage. NOTE: Both Hydraulic Clutch circuits contain a small bleed orifice , a small amount of air leakage is normal. The Reverse hydraulic clutch circuit bleed orifice connects to the OD hydraulic clutch cavity. A small amount of air leakage into the OD hydraulic clutch circuit is considered normal. Were there any problems found? Yes Repair as necessary. If clutch debris is present, remove the transmission and inspect the Reverse and L/R clutches, and inspect the Transmission Oil Pump and Main Regulator Valve for damage or sticking in its bore. NOTE: If the L/R clutch has failed but no obvious cause is found (such as a cut piston seal, cut tower seal, stuck regulator valve or any other items listed above) replace the Transmission Solenoid/TRS Assembly in addition to any necessary internal repairs. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 5 .
5. CLUTCH TEST FAILURE Did the clutch test fail in reverse? Yes Go To 6 . No Test complete. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
6. CHECK FOR FAILED REVERSE GEARSET SPLINES Working through the windows in the bottom of the case, check for a failed Reverse Sun or Annulus spline as follows: Hold the Transmission Output Shaft by holding the Transmission Manual Lever in the park position. Apply the 4C clutch using 30-40 psi shop air at the apply port in the center bulkhead. Attempt to rotate the input annulus gear and drive shell (the drum that encloses the two rearmost gearsets). NOTE: Due to the overrunning clutch, the gear and drive shell normally rotates in one direction only. Can the drive shell be rotated? Yes Repair internal transmission as necessary in accordance with the Service Information. Check the reaction annulus gear weld to the reverse carrier, and the reaction sun gear weld to the 4C clutch hub. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 7 .
7. CHECK THE DRIVE SHELL WELD Release the output shaft and the 4C clutch. Apply the L/R Clutch only using 30-40 psi of shop air. Attempt to rotate the drive shell as in the previous step. Can the drive shell be rotated? Yes Repair Transmission as necessary in accordance with the Service Information. Check the drive shell weld to input annulus gear. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Disassemble and inspect the input clutch assembly. Check the Reverse clutch reaction plate snap ring. Check the OD and Reverse clutch seals, discs, and bleed orifice (in the OD/Reverse clutch piston). Check the Reverse hub and shaft. If no problems are found, check the L/R clutch assembly and repair as necessary. If all clutches are OK, replace the Transmission Solenoid/TRS assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
8. CHECK FOR INTERMITTENT OPERATION Intermittent gear ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Check the Speed Sensor wiring and connectors for good connection, then perform a wiggle test using the Transmission Simulator (special tool #8333A, Simulator, Transmission). Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test complete.

1. CHECK FOR RELATED DTC P0750 With the scan tool, read DTCs. Is the DTC P0750 present also? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK IF THE DTC IS CURRENT With the scan tool, read and RECORD ALL Transmission DTCs. After recording DTCs, erase DTCs. Drive the vehicle until the transmission temperature is at least 43° C or 110° F and the engine temperature at least 49° C or 120° F. Perform the following steps 3 times. Using the AutoStick® (ERS) to place the transmission in 3rd gear. While monitoring the Torque convertor slip on the scan tool, accelerate smoothly at light to moderate throttle from 1200 to 2500 engine RPM and watch for TCC engagement. NOTE: Normal torque converter clutch slippage is 0 (± 20 RPM) in full lock-up. Pick the one that best describes your findings: TCC State remained at "Unlock" (controller never commanded TCC engagement) Go To 3 . Torque Converter Slip dropped properly to 0 (± 20 RPM) Go To 4 . TCC State showed "Transitioning" or "Full EMCC", but there was little or no change in T/C Slip Go To 5 . TCC tried to engage but had significant positive slip (60-150 RPM) Replace the Torque Converter and remove inspect the Transmission Oil Pump Assembly in accordance with the Service Information. NOTE: Check the input shaft end play before removing the pump. HOLD the input shaft during pump removal to prevent thrust bearings in the input clutches from falling out of position. Split the pump assembly and inspect for torque converter debris. Clean as necessary. Verify that the Torque Converter Switch Valve and the Torque Converter Clutch Control Valve (located in the Transmission Oil Pump Valve Body) are not sticking in their bores. Reinstall Transmission Oil Pump Assembly and verify proper input shaft end play. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
3. CHECK FOR TCC ENGAGEMENT COMMANDED Verify that the transmission temperature is at least 43° C or 110° F and the engine temperature at least 49° C or 120° F. Using the scan tool, monitor the "Target Gear TCC State" in the following steps. Road test the vehicle. Using the AutoStick® (ERS) in ERS "3", ERS "4", ERS "5", and Drive with an engine speed up to 2500 RPM in each position. Pick the one that best describes your findings: TCC would engage properly when commanded Go To 4 . TCC would NOT engage properly when commanded Go To 5 . Target Gear TCC State remained in the "Unlock" state continuously 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 and program the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
4. CHECK WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorts and open circuits. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorts and open circuits. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.
5. CHECK THE L/R-TCC SOLENOID With the scan tool, check for other transmission DTCs. Are the DTCs P1775 and P0841 present also? Yes Replace Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 6 .
6. CHECK THE TORQUE CONVERTER AND/OR INTERNAL TRANSMISSION Repair internal transmission as necessary. Check for the following possible causes. Refer to the Service information for the proper repair procedures. Inspect the Transmission Oil Pump Assembly. Note: Check the input shaft end play before removing the pump. HOLD the input shaft during pump removal to prevent thrust bearings in the input clutches from falling out of position. Split the pump assembly and inspect for torque converter debris. Clean as necessary. Verify that the Torque Converter Switch Valve and the Torque Converter Clutch Control Valve (located in the Transmission Oil Pump Valve Body) are not sticking in their bores. Reinstall Transmission Oil Pump Assembly and verify proper input shaft end play. Check the Teflon seal rings on the input shaft. Note: If one of the seal rings is cut, the loose piece will often lodge in the TCC switch valve, causing it to stick in its bore. If no problems are found, replace the Transmission Solenoid/TRS Assembly. Repair In all cases, replace the Torque Converter in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

Scheme 1061

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. CHECK THE POWER AND GROUND CIRCUITS This DTC is set when the Transmission portion of the Powertrain Control Module is initialized while the vehicle is moving down the road in a valid forward gear. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Check all of the Fused B(+), Fused Ignition Switch Output, and ground circuits to the PCM for an intermittent open or short to ground. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Repair Check all power and ground circuits to the PCM and repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK FOR RELATED DTCS With the scan tool, read DTCs. Are there any other line pressure DTCs present? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . Perform the test for P0934 and/or P0935 first if they are present. No Go To 2 .
2. COMPARE ACTUAL LINE PRESSURE TO DESIRED LINE PRESSURE CAUTION: Apply Parking Brake Start the engine. CAUTION: Firmly apply the brakes. With the scan tool, monitor the Line Pressure, Desired Line Pressure and the TPS degrees. While firmly applying the brakes, place the shifter in reverse, then slowly press the accelerator pedal to a TPS degree of 15°. Compare the Line Pressure reading to the Desired Line Pressure reading on the scan tool. Does the Line Pressure stay within ± 34 kPa (5 psi) of the Desired Line Pressure? No Go To 3 . Yes Go To 6 .
3. CHECK LINE PRESSURE CONNECTOR AND WIRING Ignition on, engine not running. With the scan tool, monitor the Line Pressure Sensor voltage while wiggling the wiring harness and connectors pertaining to the Line Pressure Sensor and the Transmission Solenoid/TRS Assembly. Did the voltage remain steady while wiggling the wiring harness and connectors? Yes Go To 4 . No Disconnect and properly reconnect the Line Pressure Sensor connector. Inspect terminals and repair as necessary. Perform 68RFE TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
4. CHECK PCM AND WIRING USING THE TRANSMISSION SIMULATOR Turn the ignition off to the lock position. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). With the Transmission Simulator select the "OFF" position on the "Input/Output Speed" switch. Ignition on, engine not running. With the scan tool, monitor the Line Pressure during the following step. With the Transmission Simulator, turn the selector switch to each of the three Line Pressure positions. NOTE: All three scan tool Line Pressure readings should be steady and ±14 kPa (2.0 psi) or 0.1 of a volt of the reading specified on the Transmission Simulator. Does the Line Pressure on the scan tool fluctuate up and down more than 69 kPa (10 psi) or 0.25 of a volt at any of the 3 line pressure positions on the Transmission Simulator? 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 and program the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 5 .
5. CHECK THE LINE PRESSURE SENSOR Turn the ignition off to the lock position. Disconnect the Transmission Simulator (special tool #8333A, Simulator, Transmission) and reconnect all previously disconnected connectors. Install the Line Pressure Adaptor (special tool #8259, Adapter, Pressure Test), and the Pressure Gauge (special tool #C-3293-SP, Gauge, Pressure 0-300 P.S.I.), 0 to 2000 kPa (0 to 300 psi). Start the engine in park. Monitor the line pressure readings of both the scan tool and the pressure gauge and compare the two readings. Is the line pressure gauge reading within 34 kPa (5 psi) of the scan tool reading? Yes Repair internal transmission and inspect the oil pump in accordance with the Service information and replace if necessary. If no problems are found, replace the Transmission Solenoid/TRS Assembly - possible cause is the Pressure Control Solenoid is stuck. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Line Pressure Sensor in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
6. CHECK WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorted and open circuits. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Where there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. SHIFT LEVER POSITION TEST Using the scan tool, perform a Shift Lever Position test. Follow the instructions on the scan tool. Did the Shift Lever Position Test pass? Yes Go To 2 . No Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
2. CHECK TO SEE IF DTC P0944 IS CURRENT Place the gear selector in Park. Start the engine. The transmission must be at operating temperature prior to checking pressure. A cold transmission will give higher readings. Run the engine at 1500 RPM. With the scan tool, monitor the Transmission Line Pressure. Does the (actual) Line Pressure match the Desired Line Pressure within ± 34 kPa (5 psi)? No Go To 6 . Yes Go To 3 .
3. CHECK LINE PRESSURE IN DRIVE AND REVERSE Firmly apply the brake and repeat the previous test in both Drive and the Reverse gear positions. With the scan tool, monitor the Transmission Line Pressure. Does the Line Pressure match the Desired Line Pressure within ± 5 psi in all gear ranges? Yes Go To 4 . No Go To 5 .
4. REVIEW CUSTOMER COMMENTS The conditions necessary to set this DTC are not present at this time. Verify with the customer if a delayed engagement and/or an intermittent "No Drive" condition has occurred. If the customers answer is "No" erase the DTC and return the vehicle to the customer. Make sure to check for any TSBs or controller flash updates that my apply. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Has the customer experienced any delayed engagement and/or "No Drive" conditions? Yes Go To 6 . No Test Complete.
5. DTC VERIFICATION Read and record the DTC and the Event Data information. Test drive the vehicle and attempt to operate the vehicle within the parameters in which the DTC set. With the scan tool, read DTCs. Did any following DTCs set, P0868, P0944, P0841, P0846, P0871, P0876, or P0988? Yes Go To 6 . No Test Complete.
6. CHECK TRANSMISSION OIL FILTER Remove and inspect the Transmission Oil Pan in accordance with the Service Information. Remove and inspect the Primary Oil Filter in accordance with the Service Information. Inspect the oil filter seal for damage and proper installation. Does the Oil Pan contain excessive debris, or is the oil filter plugged, loose, or damaged? Yes Repair the cause of the plugged transmission oil filter or excessive debris. Check the Transmission Oil Filter seal for improper installation onto filter neck instead of into the pump bore, not fully seated against pump housing, filter neck not engaged into pump. Check that the spin-on cooler return filter (if equipped) is not loose, and that its gasket is in good condition and properly seated. Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Repair the Transmission Oil Pump as necessary. Check for a stuck main regulator valve and clean if necessary. Refer to the Service Information for the proper repair procedure. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK FOR RELATED DTCS With the scan tool, read DTCs. Are there any TIPM TCM Power Control Circuit or TCM Power Input DTCs present? Yes Refer to appropriate Electrical Diagnostic Information and perform the appropriate diagnostic procedure . No Go To 2 .
2. DTC DATA SHOW CURRENT DTC With the scan tool, check the Event Data. NOTE: Make sure to record all Event Data stored in the scan tool for future reference in this test procedure. Does the Event Data show data for DTC P0988? Yes Go To 3 . No Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the diagnostic procedure identified in the Event Data .
3. CHECK IF MULTIPLE DTCS ARE PRESENT In the Event Data recorded earlier, are there two or more related Pressure Switch Sense DTCs present in addition to P0988? Yes Go To 4 . No Go To 7 .
4. RELATED DTC PRESENT In the Event Data recorded earlier, do all the pressure switches read CLOSED for P0988? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the diagnostic procedure for the DTC P0882 . No Go To 5 .
5. CHECK IF THE PRESSURE SWITCHES READ OPEN In the Event Data recorded earlier, do all the pressure switches read OPEN? Yes Go To 6 . No Go To 7 .
6. CHECK FOR LOW LINE PRESSURE In the Event Data recorded earlier, is the Line Pressure less than 40 psi, and significantly below the Desired Line Pressure? Yes Repair as necessary to correct low line pressure. Check fluid level and adjust as necessary. If fluid level is OK, check the Primary Oil Filter seal for a split, crack, or improperly installed. If the filter and seal are OK, check the Main Regulator Valve in the Oil Pump. Refer to the Service Information for the above procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
7. CHECK IF THE DTC P0871 ALSO SET With the scan tool, read DTCs. Is the DTC P0871 also present? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the diagnostic procedure for P0871 . No Go To 8 .
8. CHECK IF THE DTC SET IN PARK, REVERSE OR NEUTRAL In the Event Data recorded earlier, does the Event Data show the DTC P0988 set in Park, Neutral, or Reverse? Yes Go To 13 . No Go To 9 .
9. CHECK IF THE Event Data READS CLOSED In the Event Data recorded earlier, does the Event Data show the 4C Pressure Switch reading CLOSED? Yes Go To 11 . No Go To 10 .
10. CHECK THE PRIMARY OIL FILTER SEAL In the Event Data recorded earlier, is the Line Pressure less than 40 psi, and significantly below the Desired Line Pressure? Yes Repair as necessary to correct low line pressure. Check fluid level and adjust as necessary. If fluid level is OK, check the Primary Oil Filter seal for a split, crack, or improperly installed. If the filter and seal are OK, check the Main Regulator Valve in the Oil Pump. Refer to the Service Information for the above procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 15 .
11. CHECK THE PCM AND WIRING USING THE TRANSMISSION SIMULATOR Turn the ignition off to the lock position. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Ignition on, engine not running. With the Transmission Simulator, turn the Pressure Switch selector switch to the 4C position. With the scan tool, monitor the 4C Pressure Switch while pressing the Pressure Switch test button on the Transmission Simulator (special tool #8333A, Simulator, Transmission). Did the state of the 4C Pressure Switch change while pressing the Pressure Switch Test button? Yes Go To 12 . No Go To 13 .
12. CHECK THE TRANSMISSION SOLENOID/TRS ASSEMBLY Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorted and open circuits. Where there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
13. CHECK THE (T48) 4C PRESSURE SWITCH SENSE CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the Transmission Simulator (special tool #8333A, Simulator, Transmission). Disconnect the PCM C2 harness connector. Measure the resistance of the (T48) 4C Pressure Switch Sense circuit between the Transmission Solenoid/TRS Assembly harness connector and the appropriate terminal of the PCM C2 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T48) 4C Pressure Switch Sense circuit for an open. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 14 .
14. CHECK THE (T48) 4C PRESSURE SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (T48) 4C Pressure Switch Sense circuit. Is the resistance below 5.0 Ohms? Yes Repair the (T48) 4C Pressure Switch Sense circuit for a short to ground. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Powertrain Control Module in accordance with the Service Information. With the scan tool, perform the Quick Learn procedure. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
15. CHECK IF THE NO. 5 AND/OR NO. 7 CHECK BALL IS CUT OR DAMAGED Turn the Ignition off to the lock position. Remove the Valve Body Assembly in accordance with the Service Information. Inspect the No. 5 and No. 7 check balls for any cuts or damage. Inspect the 4C accumulator piston and seals and also the 4C tower seal on top of the valve body. Refer to the Service Information. Where there any problems found? Yes Repair as necessary. Check for excessive clutch debris in the transmission oil pan. If excessive clutch debris is present, repair 4C clutch as necessary. Refer to the Service Information for proper repair procedures. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 16 .
16. CHECK FOR EXCESSIVE LEAKAGE WITHIN THE 4C CLUTCH CIRCUIT Air check the 4C Clutch hydraulic circuit. Refer to the Service Information. NOTE: This hydraulic clutch circuit contains a small bleed orifice. Small leakage is considered normal. Was there excessive air leakage in the 4C Clutch hydraulic circuit? Yes Repair as necessary. Refer to the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. POSSIBLE CAUSES This DTC is an informational DTC only. This DTC is set due to a momentary loss of power and/or the ground circuits to the PCM. Below are a list of possible causes associated with this DTC. Battery was disconnected. The battery disconnect feature (if equipped) on the scan tool was performed. The Quick Learn feature on the scan tool was performed. PCM was replaced or disconnected. Were any of the above possible causes performed? Yes This is the cause of the DTC. Erase the DTC and return vehicle to customer. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 2 .
2. CHECK WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. NOTE: Check all power and ground circuits to the PCM for a intermittent or high resistance condition. Wiggle the wires while checking for shorted and open circuits. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Where there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. CHECK FOR RELATED DTCS With the scan tool, read DTCs. Are the DTCs P0729, P0731, P0732, P0733, P0734, P0735, or P0716 present? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure for the reported DTC(s) . No Go To 2 .
2. CHECK SHIFTER ADJUSTMENT Check Shift Lever adjustment in accordance with the Service Information. Is the shifter properly adjusted? Yes Go To 3 . No Adjust the Shifter Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
3. CHECK CUSTOMER DRIVING HABIT This DTC can be set if the customer rests their hand on the shift lever while they are driving. The transmission can be put in the T3 position if just enough upward pressure towards neutral is exerted on the shift lever. When this occurs, the feed port to the clutch is restricted, the transmission will declare neutral, and this DTC will be set. The customer should be informed not to rest their hand on the shifter while driving. This DTC can also be set by simply bumping the shift lever toward neutral while accelerating. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. If there are no possible causes remaining, view repair. Repair This DTC can be set by putting too much forward pressure on the shift lever while it is in the OD position. Make sure the customer is informed. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

1. CHECK FOR RELATED DTCS With the scan tool, check for other transmission DTCs. Is the DTC P0841 present also? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK IF THE DTC IS CURRENT With the scan tool, read DTCs. Is the status Active or is the Starts Since Set counter 2 or less for this DTC? Yes Go To 3 . No Go To 6 .
3. CHECK THE PCM AND WIRING Turn the ignition off to the lock position. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Ignition on, engine not running. With the Transmission Simulator, turn the Pressure Switch selector switch to L/R. With the scan tool, monitor the L/R Pressure Switch state while pressing the Pressure Switch Test button on the Transmission Simulator. Did the state of the L/R Pressure Switch change while pressing the Pressure Switch Test button? Yes Go To 4 . No Go To 5 .
4. CHECK IF THE SOLENOID SWITCH VALVE STICKING Turn the ignition off to the lock position. Remove the Transmission Oil Pan in accordance with the Service Information. Remove the Transmission Valve body in accordance with the Service Information. Inspect the Solenoid Switch Valve and Plugs for sticking. Is the Solenoid Switch Valve or Plugs sticking? Yes Clean and inspect in accordance with the Service Information. Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
5. CHECK THE L/R PRESSURE SWITCH SENSE CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT Turn the ignition off to the lock position. Disconnect the Transmission Solenoid/TRS Assembly harness connector. Disconnect all PCM harness connectors. Measure the resistance between the (T50) L/R Pressure Switch Sense circuit and all other circuits in the Transmission Solenoid/TRS Assembly harness connector. Is the resistance below 5.0 Ohms between the (T50) L/R Pressure Switch Sense circuit and all other circuit(s) in the Transmission Solenoid/TRS Assembly harness connector? Yes Repair the (T50) L/R Pressure Switch Sense circuit for a short to another circuit(s). Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
6. CHECK WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorted and open circuits. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Where there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. CHECK FOR RELATED DTCS With the scan tool, check for other transmission DTCs. Is the DTC P0841 present also? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK TO SEE IF DTC P1776 IS CURRENT With the scan tool, Check the Starts Since Set counter. NOTE: NOTE: This counter only applies to the last DTC set. Is the Starts Since Set counter 2 or less? Yes Go To 3 . No Go To 7 .
3. CHECK THE PCM AND WIRING Turn the ignition off to the lock position. Remove the Ignition Switch Feed fuse from the TIPM. CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear. WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury. Install the Transmission Simulator (special tool #8333A, Simulator, Transmission). Ignition on, engine not running. With the Transmission Simulator, turn the Pressure Switch selector switch to the L/R position. With the scan tool, monitor the L/R Pressure Switch state while pressing the Pressure Switch Test button on the Transmission Simulator. Did the state of the L/R Pressure Switch change while pressing the Pressure Switch Test button? Yes Go To 4 . No Go To 5 .
4. CHECK THE SOLENOID SWITCH VALVE Remove the Valve Body in accordance with the Service Information. Inspect the Solenoid Switch Valve and plugs for sticking in the bore and/or wear. Were there any problems found? Yes Clean and repair as necessary in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 7 .
5. CHECK THE L/R PRESSURE SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the Transmission Simulator (special tool #8333A, Simulator, Transmission). Disconnect the PCM C2 harness connector. Measure the resistance of the (T50) L/R Pressure Signal circuit between the Solenoid/TRS Assembly harness connector and the appropriate terminal of the PCM C2 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T50) L/R Pressure Signal circuit for an open. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 6 .
6. CHECK THE (T50) L/R PRESSURE SIGNAL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (T50) L/R Pressure Signal circuit. Is the resistance below 5.0 Ohms? Yes Repair the (T50) L/R Pressure Signal circuit for a short to ground. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
7. CHECK WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorted and open circuits. This DTC can also be set by the Solenoid Switch Valve intermittently sticking in it's bore under extreme temperature conditions, or by a worn Solenoid Switch Valve or plugs. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set. Where there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. OTHER DTCS PRESENT With the scan tool, check for other transmission DTCs. Are there any Pressure Switch Sense circuit DTCs present also? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 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 (ERS) downshifts at closed throttle from speeds of about 16 to 24 Km/h (10 to 15 mph). With the scan tool, read the L/R CL VOL INDEX. Is the L/R CL VOL INDEX below 20? Yes Go To 3 . No Go To 5 .
3. L/R CLUTCH CIRCUIT LEAKS IN THE VALVE BODY Turn the ignition off to the lock position. Remove the transmission oil pan in accordance with the Service Information. Remove the valve body in accordance with 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 Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 4 .
4. AIR CHECK L/R CLUTCH CIRCUITS Perform an air check on the L/R Clutch circuit in accordance with the Service Information. Watch and listen for L/R Clutch piston movement. Does the L/R piston stroke and return properly? Yes Replace the Transmission/TRS Solenoid Assembly in accordance with the service information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No 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. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
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 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. OTHER DTCS PRESENT With the scan tool, check for other transmission DTCs. Are there any Pressure Switch Sense circuit DTCs present also? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK 2C CLUTCH VOLUME INDEX With the scan tool, erase Transmission DTCs. Drive the vehicle at about 1000 RPM on the Output Speed sensor, then use the AutoStick® (ERS) and select 3rd gear. This will put the vehicle into third gear. NOTE: The TRANS TEMP DEG must be at least 43° C (110° F) before performing the following steps. Perform at least ten 3-2 kickdowns by allowing the vehicle to coast down to 650 to 550 RPM on the Output Speed sensor, then depressing the throttle between 40 and 50 Degrees. NOTE: Do not exceed 54 Degrees of Throttle Angle. With the scan tool, read the 2C CL VOL INDEX. Is the 2C CL VOL INDEX below 10? Yes Go To 3 . No Go To 5 .
3. 2C CLUTCH CIRCUIT LEAKS IN THE VALVE BODY Turn the ignition off to the lock position. Remove the transmission oil pan in accordance with the Service Information. Remove the valve body in accordance with the service information. Check condition of the 2C accumulator springs. Look for possible leak paths into the 2C clutch hydraulics circuit within the valve body. Were any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 4 .
4. AIR CHECK 2C CLUTCH CIRCUIT Turn the ignition off to the lock position. Perform an air check on the 2C Clutch circuit in accordance with the Service Information. Watch and listen for 2C Clutch piston movement. Dose the piston stroke and return properly? Yes Replace the Transmission/TRS Solenoid Assembly in accordance with the service information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Repair internal transmission as necessary. Pay attention to the components related to the 2C clutch. A broken or dislodged 2C return spring, snap ring or broken 2C Accumulator Spring could cause this problem. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
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 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 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. OTHER DTCS PRESENT With the scan tool, check for other transmission DTCs. Are there any Pressure Switch Sense circuit DTCs present also? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 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 3-4 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 Go To 3 . No Go To 5 .
3. OD CLUTCH CIRCUIT LEAKS IN THE VALVE BODY Turn the ignition off to the lock position. Remove the transmission oil pan in accordance with the Service Information. Remove the valve body in accordance with 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 Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 4 .
4. AIR CHECK OD CLUTCH CIRCUIT Perform an air check on the OD Clutch circuit in accordance with 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 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 in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission/TRS Solenoid Assembly in accordance with the service information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
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 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. OTHER DTCS PRESENT With the scan tool, check for other transmission DTCs. Are there any Pressure Switch Sense circuit DTCs present also? Yes Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK UD CLUTCH VOLUME INDEX With the scan tool, erase Transmission DTCs. 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 5-4 kickdowns by depressing the throttle between 40 and 50 TPS degrees at speeds about 1500 to 1700 RPM on the Output Speed sensor. With the scan tool, read the UD clutch volume index (CVI). Is the UD CVI below 10? Yes Go To 3 . No Go To 5 .
3. UD CLUTCH CIRCUIT LEAKS IN THE VALVE BODY Turn the ignition off to the lock position. Remove the transmission oil pan and valve body in accordance with the Service Information. Check the condition of the UD accumulator springs. Look for possible leak paths into the UD clutch hydraulics circuit within the valve body. Were there any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 4 .
4. AIR CHECK UD CLUTCH CIRCUIT Perform an air check on the UD Clutch circuit in accordance with the Service Information. Watch and listen for UD Clutch piston movement. Air check all other pump passages for air leakage into the UD Clutch circuit. Were any problems found? Yes Repair internal transmission. Pay attention to components related to the UD clutch. Broken or weak return spring or a dislocated snap ring. If no trouble is found in UD clutch component or UD clutch leakage was noted in passage, replace the Pump Assembly. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission/TRS Solenoid Assembly in accordance with the service information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
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 Km/h or 50 mph, then brake lightly to a stop. Turn off engine. With the scan tool, record the clutch volume 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 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 in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. CHECK THE 4C CLUTCH VOLUME With the scan tool, record the 4C clutch volume index (CVI) and erase DTCs. Perform at least 10, 4-5 upshifts with the throttle between 10 and 54 degrees. The Transmission temperature must be at least 43° C or 110° F. With the scan tool, read the 4C CVI. Is the current 4C CVI below 10? Yes Go To 2 . No Go To 5 .
2. DTC P0876 PRESENT With the scan tool, read DTCs. NOTE: The DTC P0876 must also be set with P2704 in order for this test to be valid. Is the DTC P0876 also present? Yes Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 3 .
3. 4C CLUTCH CIRCUIT LEAKS IN THE VALVE BODY Turn the ignition off to the lock position. Remove the transmission oil pan in accordance with the Service Information. Remove the valve body in accordance with the Service Information. Check condition of the 4C accumulator springs. Look for possible leak paths into the 4C clutch hydraulics circuit within the valve body. Were any problems found? Yes Repair as necessary. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Go To 4 .
4. AIR CHECK 4C CLUTCH CIRCUIT Perform an air check on the 4C Clutch circuit in accordance with the Service Information. Listen for proper 4C Clutch piston movement. Were any problems found? Yes Repair Internal transmission as necessary. Pay attention to the mechanical components related to the 4th clutch. A broken or weak return spring or a dislocated snap ring could cause this problem. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Replace the Transmission Solenoid/TRS Assembly in accordance with the service information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .
5. VERIFY PCM OPERATION Perform eight learnable starts. A learnable start is defined as follows: Start engine. From a standstill, accelerate lightly to 50 MPH, then brake lightly to a stop. Turn off engine. With the scan tool, record Transmission 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 reading recorded before the BATTERY DISCONNECT. Are any of the CVIs less than 5 or are they 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 and program the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Test Complete.

1. ACTIVE DTC Ignition on, engine not running. With the scan tool, select view DTCs. Is the DTC Active at this time? Yes Diagnose the U0002-CAN C BUS OFF PERFORMANCE as the U0001-CAN C BUS CIRCUIT test. Refer to «U0001-CAN C BUS»(ref-457926-S37851162552012030200000) for 2500 & 3500 or «U0001-CAN C BUS CIRCUIT»(ref-457927-S12132305092012030200000) for 3500 Cab & Chassis, 4500 & 5500 . and perform the U0001-CAN C Bus diagnostic procedure. No Perform the «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 2500 and 3500, or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab & Chassis, 4500 and 5500 diagnostic procedure . and perform the Stored Lost Communication DTCs diagnostic procedure.

1. ACTIVE DTC Ignition on, engine not running. With the scan tool, select view DTCs. Is the DTC Active at this time? Yes Refer to «U0100-LOST COMMUNICATION WITH ECM/PCM»(ref-457926-S20829842002012030200000) for 2500 & 3500 or «U0100-LOST COMMUNICATION WITH ECM/PCM»(ref-457927-S23421614512012030200000) for 3500 Cab & Chassis, 4500 & 5500 . and perform the U0100-Lost Communication with ECM/PCM diagnostic procedure. No Perform the «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 2500 and 3500, or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab & Chassis, 4500 and 5500 diagnostic procedure . and perform the Stored Lost Communication DTCs diagnostic procedure.

1. ACTIVE DTC Ignition on, engine not running. With the scan tool, select view DTCs. Is the DTC Active at this time? Yes Refer to «U0121-LOST COMMUNICATION WITH ABS»(ref-457926-S35110098752012030200000) for 2500 & 3500 or «U0121-LOST COMMUNICATION WITH ABS»(ref-457927-S35474949542012030200000) for 3500 Cab & Chassis, 4500 & 5500 . and perform the U0121-Lost Communication with Anti-Lock Brake Module diagnostic procedure. No Perform the «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 2500 and 3500, or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab & Chassis, 4500 and 5500 diagnostic procedure . and perform the Stored Lost Communication DTCs diagnostic procedure.

1. VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)»(ref-457926-S24039559512012030200000) for 2500 & 3500 or «U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)»(ref-457927-S04407950332012030200000) for 3500 Cab & Chassis, 4500 & 5500 . and perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure. No Perform the «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 2500 and 3500, or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab & Chassis, 4500 and 5500 diagnostic procedure . and perform the Stored Lost Communication DTCs diagnostic procedure.

1. CHECK FOR TIPM CAN BUS DTCS With the scan tool, read TIPM DTCs. Are there any TIPM CAN BUS DTCs present? Yes Refer to appropriate Electrical Diagnostic Information and perform the appropriate diagnostic procedure . No Go To 2 .
2. CHECK IF CCN DTCS ARE PRESENT With the scan tool, read CCN DTCs. Are there any CCN DTCs present? Yes Refer to «Diagnosis and Testing»(ref-457880-S08881951252012030200000) and perform the appropriate diagnostic procedure. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Using the schematics as a guide, check the Powertrain Control Module (PCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the PCM in accordance with the Service Information. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) .

68RFE PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Note. This vehicle uses a Cummins Control Module which controls the Transmission operation and the Diesel engine operation. In these procedures, the Cummins Control Module is referred to as the Powertrain Control Module (PCM).

1. Perform the following before attempting any diagnostic procedures: With the scan tool check pinion factor (if equipped) for proper tire identification and program or reprogram if necessary. Check the transmission fluid level. If the fluid level is low, locate and repair any leaks and fill the transmission to the proper level. Refer to the appropriate Service Information for procedures. Many transmission symptoms can be caused by a low fluid level. Check the battery. To avoid false diagnosis, testing should only be performed with the battery fully charged. With the scan tool, read Engine (PCM) DTCs. If DTCs are present, refer to the appropriate Electrical Diagnostic Information and perform the appropriate diagnostic procedure(s) before proceeding. With the scan tool, read Transmission (PCM) DTCs. Record all Stored, Active, and Pending DTC information. Diagnose any Pending DTC as a matured DTC. With the scan tool, read and record the Event Data. Use this data to identify the conditions in which the DTC was set. NOTE: DTC Event Data may exist even if no DTCs are stored. DTC Event Data is only erased by a Battery Disconnect, reflash, or QuickLearn procedure. Clearing DTCs does NOT erase the DTC Event Data. Some DTCs require two "bad trips" before they are stored (and the MIL illuminates). The transmission may enter "limp-in" mode during the first "bad trip," but if the fault condition is not present after the vehicle is restarted, the pending DTC may be cleared without lighting the MIL. Nevertheless, the DTC Event Data for the pending DTC will remain stored and can still be retrieved with the scan tool. If the customer reports a "limp-in" event but no DTCs are present, check the DTC Event Data. Performing a Battery Disconnect will clear all Event Data and reset all learned Transmission values to the default values, which may temporarily result in erratic shift schedules. With the scan tool, perform the Shift Lever Position Test. If the test fails with an error code, refer to the diagnostic procedure for P0706 Transmission Range Sensor Rationality. If the test fails without an error code, adjust the shift linkage in accordance with the Service Information. For Gear Ratio Error DTCs or shift quality complaints, use the scan tool to view CVI Monitor data. Read and record the Clutch Volume Index information. Use the wiring diagram as a guide. Inspect the wiring and connectors related to this circuit. Repair as necessary. Refer to the When Monitored and Set Conditions for this DTC. DTCs can set at ignition on, at start up, after driving under specific conditions and after diagnostic monitors have been run. Perform any applicable Technical Service Bulletins (TSBs) for controller software update information. Some conditions can be corrected by upgrading the (PCM) controller software. Were there any repairs made that fixed the vehicle? Yes Testing complete. Perform the appropriate TRANSMISSION VERIFICATION TEST. Refer to «68RFE TRANSMISSION VERIFICATION TEST»(ref-457914-S21579803282012030200000) . No Refer to «Diagnosis and Testing»(ref-457914-S29929768152012030200000) and perform the appropriate diagnostic procedure .

68RFE TRANSMISSION VERIFICATION TEST

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. Perform the following after completion of a diagnostic repair: With the scan tool check pinion factor (if equipped) for proper tire identification and program or reprogram if necessary. Connect the scan tool to the Data Link Connector (DLC). Reconnect any disconnected components. If the PCM has been replaced or updated (flashed), or the transmission has been repaired or replaced, using the scan tool, perform a Quick Learn Procedure. With the scan tool, erase all Transmission and Engine DTCs. With the scan tool, perform a BATTERY DISCONNECT, this will clear the Event Data With the scan tool, display Transmission Temperature. Start and run the engine until the Transmission Temperature is HOT. Check the Transmission fluid level and adjust if necessary. Refer to the Service Information for the Fluid Fill procedure. Road test the vehicle. Perform the following shifts from a standing start with a constant throttle opening of 20 to 25 degrees to the speeds of 97 km/h (60 mph); make fifteen to twenty 1 to 2, 2 to 3, 3 to 4, 4 to 5, 5 to 6 upshifts. Perform the following shifts with speeds below 40 km/h (25 mph); make five to eight wide open throttle kickdowns to 2nd gear. Allow at least 5 seconds each in 3rd and 4th gear between each kickdown. Check for DTCs during and after the road test. If after performing the road test, if any shift concerns are noted, perform the drive learn procedure for those affected shifts. Use the OBDII task manager to run Good Trip time in each gear, this will confirm the repair and to ensure that the DTC does not re-mature. Were there any Diagnostic Trouble Codes (DTCs) set during the road test? Yes Refer to DTC Based Diagnostics and perform the appropriate diagnostic procedure. No Repair is complete.