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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 488 (Powertrain Diagnostic Procedures - Gas) >> Diagnostic Information And Procedures >> Transmission - 42RLE - Diagnostic Tests >> P0725-Engine Speed Sensor Circuit >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
P0725-ENGINE SPEED SENSOR CIRCUIT DIAGNOSTIC TEST REFERENCE

TEST ACTION APPLICABILITY
1
NOTE: Low fluid level can be the cause of many transmission problems. If the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid false symptoms.
With the DRBIII®, read Engine DTC's. Check and repair all Engine DTC's prior to performing any transmission symptom diagnostics.With the DRBIII®, read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.Repair as necessary.Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test for P0706 CHECK SHIFTER SIGNAL .For Gear Ratio DTC's, check and record all CVI's.Most DTC's set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run.
NOTE: Verify flash level of Powertrain Control Module. Some problems are corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to Symptom diagnosis.ContinueGo To 2		 All
2 Start the engine.
NOTE: This DTC is not a Transmission Input Speed Sensor DTC.

With the DRBIII®, Check the STARTS SINCE SET counter for P0725.
NOTE: This counter only applies to the last DTC set.

Is the STARTS SINCE SET counter for P0725 set at 0?
Yes --> Go To 3
No --> Go To 5		 All
3 With the DRBIII®, read Engine DTCs.
Are there any Engine DTC's present?
Yes --> Refer to the DRIVEABILITY CATEGORY  and perform the appropriate test.
Perform 42RLE (NGC) TRANSMISSION VERIFICATION TEST - VER 1 .
No --> Go To 4		 All
4 Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.
Repair
Replace the Powertrain Control Module per the Service Information. WITH THE DRBIII® PERFORM QUICK LEARN .
Perform 42RLE (NGC) TRANSMISSION VERIFICATION TEST - VER 1 .		 All
5 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 DRBIII®, check the EATX EVENT DATA to help identify the conditions in which the DTC was set. Were there any problems found?
Yes --> Repair as necessary.
Perform 42RLE (NGC) TRANSMISSION VERIFICATION TEST - VER 1 .
No --> Test Complete.		 All
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