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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (3.6L - DTCS P2135 To U1418) >> Diagnosis And Testing >> P2135-Throttle Position Sensor 1/2 Correlation >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. 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 the scan tool, read DTCs and record on the repair order.

      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 HIGH 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. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
    5. Measure the resistance of the (K22) TPS 1 Signal circuit between the Throttle Body harness connector and the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the high resistance in the (K22) TPS 1 Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to .
  4. CHECK FOR HIGH 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 GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the high resistance in the (K922) TPS Return circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to .
  5. CHECK FOR HIGH 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 GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the high resistance in the (K122) TPS 2 Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to .
  6. CHECK FOR HIGH 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 GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the high resistance in the (F855) 5-Volt Supply circuit
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to .
  7. CHECK RELATED PCM AND COMPONENT CONNECTIONS 
    1. Perform any Service Bulletins that apply.
    2. Disconnect all PCM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    11. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • Perform the POWERTRAIN VERIFICATION TEST. Refer to .
      • Test complete.
  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 

      • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to .

      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 .
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