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Pinpoint Test

NOTE: If the scan tool is unable to communicate with the PCM or access the transmission PIDs  , REFER to INTRODUCTION - GASOLINE MODELS .
  1. Read and record all DTCs 
    1. Install the scan tool and record all DTCs  .

      Is DTC P0815 set?

      • Yes: GO to 2  .
      • No: For DTC P0816, GO to  6.
  2. Check the upshift signal circuit for voltage
    1. Ignition OFF.
    2. Disconnect the selector lever C2008.
    3. Inspect for damaged or pushed out terminals.
    4. Ignition ON.
    5. Measure the voltage on circuit CET43 (GY) from the selector lever C2008-9 to ground.
    Selector Lever Ground
    G08032634
    G08032635
    C2008 Ground
    Pin Circuit Measurement / Action Pin Circuit
    9 CET43 (GY)
    G08032636
    		 Ground Ground

    Is the voltage greater than 10 volts? 

    • Yes: GO to  5.
    • No: GO to 3  .
  3. Check the upshift signal circuit for an open
    1. Ignition OFF.
    2. Disconnect the PCM C175B.
    3. Inspect for damaged or pushed out terminals.
    4. Measure the resistance of circuit CET43 (GY) from selector lever C2008-9 to the PCM C175B-23.
    Selector Lever PCM
    G08032637
    G08032638
    C2008 C175B
    Pin Circuit Measurement / Action Pin Circuit
    9 CET43 (GY)
    G08032639
    		 23 CET43 (GY)
    • Yes: GO to 4  .
    • No: For REPAIR circuit CET43 (GY) for an open. CLEAR the DTC  . TEST the system for normal operation.
  4. Check the upshift signal circuit for a short to ground
    1. Measure the resistance of circuit CET43 (GY) from selector lever C2008-9 to ground.
    Selector Lever Ground
    G08032640
    G08032641
    C2008 Ground
    Pin Circuit Measurement / Action Pin Circuit
    9 CET43 (GY)
    G08032642
    		 Ground Ground

    Is the resistance greater than 10, 000 ohms? 

    • Yes: REPLACE the PCM. PROGRAM the PCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to SOLENOID BODY STRATEGY DOWNLOAD . TEST the system for normal operation.
    • No: REPAIR circuit CET43 (GY) for a short to ground. CLEAR the DTC. TEST the system for normal operation.
  5. Check the signal return circuit for an open
    1. Connect the PCM C175B.
    2. Ignition ON.
    3. Measure the voltage from circuit CET43 (GY) from selector lever C2008-9 and circuit RE407 (YE/VT) selector lever C2008-8.
    Selector Lever Selector Lever
    G08032643
    G08032644
    C2008 C2008
    Pin Circuit Measurement / Action Pin Circuit
    9 RE407 (YE/VT)
    G08032645
    		 8 RE407 (YE/VT)

    Is the voltage greater than 10 volts? 

    • Yes: INSTALL a new selector lever. REFER to SELECTOR LEVER . CLEAR the DTC. TEST the system for normal operation.
    • No: REPAIR the signal return circuit RE407 (YE/VT) for an open. CLEAR the DTC. TEST the system for normal operation.
  6. Check the downshift signal circuit for voltage
    1. Ignition OFF.
    2. Disconnect the selector lever C2008.
    3. Inspect for damaged or pushed out terminals.
    4. Ignition ON.
    5. Measure the voltage on circuit CET42 (GN/VT) from selector lever C2008-10 to ground.
      Selector Lever Ground
      G08032646
      G08032647
      C2008 Ground
      Pin Circuit Measurement / Action Pin Circuit
      10 CET42 (GN/VT)
      G08032648
      		 Ground Ground

    Is the voltage greater than 10 volts? 

    • Yes: GO to  9.
    • No: GO to 7  .
  7. Check the downshift signal circuit for an open
    1. Ignition OFF.
    2. Disconnect the PCM C175B.
    3. Inspect for damaged or pushed out terminals.
    4. Measure the resistance of circuit CET42 (GN/VT) from selector lever C2008-10 to the PCM C175B-24.
      Selector Lever PCM
      G08032649
      G08032650
      C2008 C175B
      Pin Circuit Measurement / Action Pin Circuit
      10 CET42 (GN/VT)
      G08032651
      		 24 CET42 (GN/VT)

    Is the resistance less than 5 ohms? 

    • Yes: GO to 8  .
    • No: REPAIR circuit CET42 (GN/VT) for an open. CLEAR the DTC. TEST the system for normal operation.
  8. Check the downshift signal circuit for a short to ground
    1. Measure the resistance of circuit CET42 (GN/VT) from selector lever C2008-10 to ground.
      Selector Lever Ground
      G08032652
      G08032653
      C2008 Ground
      Pin Circuit Measurement / Action Pin Circuit
      10 CET42 (GN/VT)
      G08032654
      		 Ground Ground

    Is the resistance greater than 10, 000 ohms? 

    • Yes: REPLACE the PCM. PROGRAM the PCM with the latest calibration level. PERFORM the Solenoid Body Strategy Data Download procedure. REFER to SOLENOID BODY STRATEGY DOWNLOAD . TEST the system for normal operation.
    • No: REPAIR circuit CET42 (GN/VT) for a short to ground. CLEAR the DTC. TEST the system for normal operation.
  9. Check the signal return circuit for an open
    1. Connect PCM C175B.
    2. Ignition ON.
    3. Measure the voltage from circuit CET42 (GN/VT) from selector lever C2008-10 and circuit RE407 (YE/VT) selector lever C2008-8.
    Selector Lever Selector Lever
    G08032655
    G08032656
    C2008 C2008
    Pin Circuit Measurement / Action Pin Circuit
    10 CET42 (GN/VT)
    G08032657
    		 8 RE407 (YE/VT)

    Is the voltage greater than 10 volts? 

    • Yes: INSTALL a new selector lever. REFER to SELECTOR LEVER . CLEAR the DTC. TEST the system for normal operation.
    • No: REPAIR the signal return circuit RE407 (YE/VT) for an open. CLEAR the DTC. TEST the system for normal operation.
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