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Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  CHECK TO SEE IF DTC P0890 IS PRESENT 

    With the scan tool, Check the STARTS SINCE SET counter for P0890.

    NOTE: This counter only applies to the last DTC set.

    Is the "STARTS SINCE SET" counter set at 0? 

    Yes 

    1. Go To step  2).

    No 

    1. Go To step  5).
  2. 2)  (T9) OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE 
    Fig 1: Checking OD Pressure Switch Sense Circuit For Short To Voltage
    GC0012662Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off to the lock position.

    Disconnect the PCM C4 harness connector.

    Disconnect the Solenoid/Pressure Switch Assembly harness connector.

    Remove the Transmission Control Relay.

    NOTE: Check connectors - Clean/repair as necessary.

    Connect a jumper wire between the (Internal) Fused B+ circuit and (T16) Transmission Control Relay Output circuit in the Transmission Control Relay connector.

    Ignition on, engine not running.

    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 voltage of the (T9) OD Pressure Switch Sense circuit.

    Is the voltage above 0.5 volt? 

    Yes 

    1. Repair the (T9) OD Pressure Switch Sense circuit for a short to voltage.
    2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1  

    No 

    1. Go To step  3).
  3. 3)  (T47) 2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE 
    Fig 2: Checking 2/4 Pressure Switch Sense Circuit For Short To Voltage
    GC0012661Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off to the lock position.

    Disconnect the PCM C4 harness connector.

    Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

    Remove the Transmission Control Relay.

    NOTE: Check connectors - Clean/repair as necessary.

    Connect a jumper wire between the (Internal) Fused B+ circuit and (T16) Transmission Control Relay Output circuit in the Transmission Control Relay connector.

    Ignition on, engine not running.

    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 voltage of the (T47) 2/4 Pressure Switch Sense circuit.

    Is the voltage above 0.5 volt? 

    Yes 

    1. Repair the (T47) 2/4 Pressure Switch Sense circuit for a short to voltage.
    2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1  

    No 

    1. Go To step  4).
  4. 4)  (T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE 
    Fig 3: Checking L/R Pressure Switch Sense Circuit For Short To Voltage
    GC0012660Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off to the lock position.

    Disconnect the PCM C4 harness connector.

    Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

    Remove the Transmission Control Relay.

    NOTE: Check connectors - Clean/repair as necessary.

    Connect a jumper wire between the (Internal) Fused B+ circuit and (T16) Transmission Control Relay Output circuit in the Transmission Control Relay connector.

    Ignition on, engine not running.

    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 voltage of the (T50) L/R Pressure Switch Sense circuit.

    Is the voltage above 0.5 volts? 

    Yes 

    1. Repair the (T50) L/R Pressure Switch Sense circuit for a short to voltage.
    2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1  

    No 

    1. 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 per the Service Information. With the scan tool PERFORM QUICK LEARN, then program Pinion Factor in the Front Control Module. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/POWERTRAIN CONTROL MODULE - REMOVAL)
    2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1  
  5. 5)  INTERMITTENT 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 EATX DTC EVENT DATA to help identify the conditions in which the DTC was set.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1  

    No 

    1. Test Complete.
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