Jeep Liberty KJ. Manual - part 1183

45RFE/545RFE PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For a complete wiring diagram Refer to Section 8W.

Perform the following before attempting any diagnostic procedures:

•

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 Driveability Category and per-
form to the appropriate diagnostic procedure(s) before proceeding.

•

With the scan tool, read Transmission (TCM) DTCs. Record all Stored, Active, and Pending DTC information.
Diagnose any Pending DTC as a matured DTC.

•

With the scan tool, read DTC EVENT DATA. Use this data to identify the conditions in which the DTC was set.

•

Performing a Battery Disconnect will clear all DTC 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 does not pass, refer to the diagnostic
procedure for P0706 Check Shifter Signal.

•

For Gear Ratio Error DTCs, 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 neces-
sary.

•

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.

•

Refer to applicable Technical Service Bulletins (TSBs) for controller software update information. Some condi-
tions can be corrected by upgrading the Engine (PCM) or Transmission (TCM) controller software.

•

Refer to any Service Information Tune Ups or Technical Service Bulletins that apply.

Were there any repairs made that fixed the vehicle?

Yes

>> Testing complete.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

>> Refer to the Transmission category and perform the appropriate diagnostic procedure(s).

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AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL)

45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1

For a complete wiring diagram Refer to Section 8W.

Perform the following after completion of a diagnostic repair:

•

After completion of the Transmission Verification Test, the Powertrain Verification Test must be per-
formed.

•

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 DTC’s.

•

With the scan tool, perform a BATTERY DISCONNECT, this will clear the DTC EVENT DATA

•

With the scan tool, display Transmission Temperature. Start and run the engine until the Transmission Tem-
perature is HOT.

•

Check the Transmission fluid level and adjust if necessary. Refer to the Service Information for the Fluid Fill
procedure. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE/FLUID - STANDARD
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 Kmh or 60 MPH; make fifteen to twenty 1 to 2, 2 to 3, 3 to 4 upshifts and for 545RFE, 4 to 5.

•

Perform the following shifts with speeds below 40 Kmh or 25 MPH; make five to eight wide open throttle kick-
downs to 1st gear. Allow at least 5 seconds each in 2nd and 3rd 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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL
MODULE - STANDARD PROCEDURE)

•

Use the EATX 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 the Transmission category and perform the appropriate symptom. (Refer to 21 - TRANSMIS-

SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - DIAGNOSIS AND TESTING)

>> Repair is complete.

AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL)

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AUTOMATIC TRANSMISSION - 545RFE

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