Code


P0601, P0606, P060B, P062F, P016F3, P16F7, P16F8 or P179B


P0634


P0667, P0668 or P0669 P06AC, P06AD or P06AE


P0711, P0712 or P0713 P0721


P0751 or P0752 P0756 or P0757 P0776 or P0777


P077B


P0796 or P0797 P079A P079B P079C P07A3 P07A5 P07A7


P0961, P0962 or P0963 P0965, P0966 or P0967 P0969, P0970 or P0971 P0973 or P0974 P0976 or P0977 P1762


P1824, P182A-P182F, P1838 or P1839 P215B


P214C


P2534 or P2535 P2537


P2714 or P2715


P2719, P2720 or P2721 P2728, P2729 or P2730


Description Internal TCM failure TCM Over-temp


TCM power-up temp sensor circuit


TFT sensor circuit OSS performance SS1 performance SS2 performance PCS 2 performance


Action to be Taken Ck TCM power & grounds, possible faulty TCM Ck trans overheat, ck cooler flow, ck faulty TCM TCM temperature sensor circuit Ck TFT circuit, ck wiring, connections, possible faulty TCM


Ck TCM power-up temp sensor, ck TFT operation, possible faulty TCM


Ck TFT circuit, wiring, connections, possible faulty TFT sensor Ck OSS signal w/scanner, compare to ABS VSS reading, Ck SS1 operation, ck SS1 in valve body Ck SS2 operation, ck SS2 in valve body


Ck pressure, ck PCS2 operation, ck TFP operation, ck v/body, ck 2-3-4 clutch operation


OSS direction incorrect Ck OSS, wiring, connections, o/put shaft PCS 3 performance


Ck pressure, ck PCS3 operation, ck TFP operation, ck v/body, ck variable low 1-2 rev clutch operation


Clutch #1, slip detected Ck pressure, monitor slip w/scanner, ck solenoids, ck valve body, air ck 1-3-rev clutch circuit


Clutch #2, slip detected Ck pressure, monitor slip w/scanner, ck solenoids, ck valve body, air ck variable high 2-3-4 clutch circuit


Clutch #3, slip detected Ck pressure, monitor slip w/scanner, ck solenoids, ck valve body, air ck variable high 2-3-4 clutch circuit


Clutch #1, stuck on Clutch #2, stuck on Clutch #3, stuck on


Line pressure solenoid performance/electrical


Ck pressure, monitor slip w/scanner, ck solenoids, ck valve body, air ck variable low 1-2-rev clutch circuit


Ck pressure, monitor slip w/scanner, ck solenoids, ck valve body, air ck variable high 2-3-4 clutch circuit


Ck pressure, monitor slip w/scanner, ck solenoids, ck valve body, air ck 1-3-rev clutch circuit


Ck pressure, ck wiring, ck connections, ck LPCS circuit, ck possible valve body (figure #3)


PCS #2 performance/electrical Ck pressure, ck wiring, ck connections, ck PCS #2 circuit, ck possible valve body/TCM assembly


PCS #3 performance/electrical Ck pressure, ck wiring, ck connections, ck PCS #3 circuit, ck possible valve body/TCM assembly


SS1 electrical SS2 electrical


Ck SS1, ck wiring, connections, ck possible valve body/TCM assembly


Ck SS2, ck wiring, connections, ck possible valve body/TCM assembly


Trans Mode Switch Counter Ck wiring, connections, ck ECM power/grounds, reprogram ECM


Internal Mode Switch circuit Ck wiring, ck connections, ck IMS circuit, ck TCM power/grounds, ck possible TCM/valve body assembly (figure #4)


VSS/OSS not plausible Ck OSS reading in scanner, compare to ABS VSS reading, reprogram/replace affected module


OSS wheel speed not plausible Ck OSS reading in scanner, compare to ABS VSS reading, reprogram/replace affected module.


Ignition 1 circuit PCS #4 performance


Ck battery voltage at TCM terminal #13, ck TCM power/grounds, ck ignition feed circuit


Ignition Accessory circuit Ck battery voltage at TCM terminal #15, ck TCM power/grounds, ck accessory feed circuit


Ck pressure, ck PCS4 operation, ck TFP operation, ck v/body, ck possible TCM/valve body assembly


PCS #4 performance/electrical Ck pressure, ck PCS4 operation, ck v/body, ck possible TCM/valve body assembly


PCS #5 performance/electrical Ck pressure, ck PCS5 operation, ck v/body, ck possible TCM/valve body assembly


Figure 1


• Determine a course of action. Once you’ve completed the


Diagnostic System Check, you’re ready to begin the diagnostic routine.


Diagnostic Routine By now you’ve verified the cus- tomer’s complaint, determined whether


GEARS March 2012


the problem is mechanical or electrical, and checked for codes. You should have enough information to choose a course of action to resolve the cus- tomer’s complaint. In this issue, we’re going to focus


mainly on the electrical side of the diag- nostic routines and leave the mechani-


cal issues for an upcoming Getting to Know the 4ET50 Transmission article. Diagnosing the 4ET50 electrical


system is pretty straightforward. After accessing the DLC connector with your scan tool and documenting any codes in each of the on-board computer systems, you’ll want to clear all codes and test


11


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