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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (1.4L 16-Valve Turbo - DTCS P2102-00 To U1463 - 500) >> DTC Troubleshooting >> P2135-00-Throttle Position Sensor 1/2 Correlation >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With a scan tool, read DTCs.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

      • Go To  8
  2. CHECK FOR AN ACTIVE TPS SENSOR PERFORMANCE DTC 

    Are the P0121 or P0221 DTC also active?

    Yes 

    • Perform the TPS Sensor Performance DTC that is active before continuing with this test procedure.

    No 

    • Go To  3
  3. CHECK FOR EXCESSIVE RESISTANCE IN THE (K22) TPS 1 SIGNAL CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the Throttle Body harness connector.
    3. Disconnect the PCM C2 harness connector.
      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 the GPEC Diagnostic Adaptor to perform the diagnosis.

    4. Measure the resistance of the (K22) TPS 1 Signal circuit between the Throttle Body harness connector and the PCM C2 connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

  4. CHECK FOR EXCESSIVE RESISTANCE IN THE (K922) TPS RETURN CIRCUIT 
    1. Measure the resistance of the (K922) TPS Return circuit between the Throttle Body harness connector and the PCM C2 connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  5

      No 

  5. CHECK FOR EXCESSIVE RESISTANCE IN THE (K122) TPS 2 SIGNAL CIRCUIT 
    1. Measure the resistance of the (K122) TPS 2 Signal circuit between the Throttle Body harness connector and the PCM C2 connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  6

      No 

  6. CHECK FOR EXCESSIVE RESISTANCE IN THE (F855) 5-VOLT SUPPLY CIRCUIT 
    1. Measure the resistance of the (F855) 5-Volt Supply circuit between the Throttle Body harness connector and the PCM C2 connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  7

      No 

  7. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Throttle Body and Powertrain Control Module connectors.
    4. Perform any Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

  8. THROTTLE FOLLOWER TEST 
    1. Turn the ignition on.
    2. With a scan tool, perform the ETC Throttle Follower Test and monitor the TPS 1 or 2 voltage.
    3. Slowly press the throttle pedal down.
    4. The voltage for TPS 1 should start at approximately 0.7 volts and increase to approximately 4.3 volts.
    5. The voltage for TPS 2 should start at approximately 4.3 volts and decrease to approximately 0.7 volts.

      Is the voltage within the range of the listed specification for the appropriate Sensor?

      Yes 

      No 

      • Verify that there is good pin to terminal contact in the Throttle Body and Powertrain Control Module connectors. If no problems are found, replace the Throttle Body Assembly. Replace the Throttle Body Assembly. Disconnect the Battery before replacing the Throttle Body. Refer to THROTTLE BODY, REMOVAL . After installation is complete, use a scan tool and select the ETC RELEARN function.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
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