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.
P1115-GENERAL TEMPERATURE SENSOR PERFORMANCE DIAGNOSTIC TEST REFERENCE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Ignition on, engine not running. With the DRBIII®, read the DTCs and record the related Freeze Frame data.
NOTE:
All ECT, Intake Air, and Ambient Air Temperature Sensor codes must be diagnosed and repaired before continuing. Is the Good Trip Counter displayed and equal to zero Yes --> Go To 2 No --> Refer to the INTERMITTENT CONDITION SYMPTOM (Diagnostic Procedure). Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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| 2 | With the DRBIII® in Sensors, read the ECT, Ambient/Battery Temp, and Intake Air Temp Sensor temp values. Start the engine. Allow the engine to reach normal operating temperature while monitoring the three Sensor temperature values. Is the temperature for each of the Sensors increasing properly? Yes --> Refer to the INTERMITTENT CONDITION SYMPTOM . Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 3 |
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| 3 | Ignition on, engine not running. Disconnect the suspected faulty sensor. Connect a jumper wire between the Sensor Signal circuit and the (K900) Sensor ground circuit. With the DRBIII® in Sensors, read the voltage of the suspected Sensor. Did the voltage reading start at 4.8 to 5.0 volts and decrease to 0 volts? Yes --> Replace the faulty Sensor. Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 4 |
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| 4 | Turn the ignition off. Disconnect the PCM harness connectors.
CAUTION:
DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMINALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS. Measure the resistance of the Sensor Signal circuit from the Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance above 5.0 ohms. Yes --> Repair the excessive resistance in the Sensor Signal circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 5 |
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| 5 |
CAUTION:
DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMINALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS. Measure the resistance of the (K900) Sensor ground circuit from the Sensor harness connector to the appropriate terminal of special tool #8815.Is the resistance above 5.0 ohms.Yes --> Repair the excessive resistance in the (K900) Sensor ground circuit.Perform POWERTRAIN VERIFICATION TEST VER - 5 .No --> Go To 6 |
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| 6 |
NOTE:
Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.If there are no possible causes remaining, review repair.RepairReplace and program the Powertrain Control Module per Service Information.Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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