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Code 9 High Speed Sensor Resistance

  1. Turn ignition off. Disconnect negative battery cable. Disconnect control module connector. See COMPONENT LOCATIONS  . Gently pull on terminal No. 3 (Light Green/Black wire) of control module and control module harness connector. Gently pull on terminal No. 10 (Red/Pink wire) of control module and control module harness connector. See Figure . If connector terminals are fully engaged and corresponding terminal of control module are okay, leave control module disconnected and go to next step. If terminal are loose or have pulled out of connector, repair or replace terminals or connector and go to step 6). If control module terminals are loose, bent, deformed, corroded or missing, replace control module and go to step 6).
  2. Ensure ignition is off. Disconnect and inspect 2-pin speed sensor connector. Speed sensor is screwed into differential assembly. Gently pull on both terminals of speed sensor harness connector. If terminals are fully engaged in connector, reconnected sensor connector and go to next step. If terminals are loose or have pulled out of connector, repair or replace terminals or connector and go to step 6). If speed sensor terminals are loose, bent, deformed, corroded or missing, replace speed sensor. Reconnect sensor connector and go to step 6).
  3. Measure resistance between terminal No. 3 (Light Green/Black wire) of control module harness connector and terminal associated with Light Green/Black wire of speed sensor harness connector. Measure resistance between terminal No. 10 (Red/Pink wire) of control module harness connector and terminal associated with Red/ Pink wire of speed sensor harness connector. If resistance is less than 10 ohms in both tests, go to next step. If resistance is more than 10 ohms in either test, repair open affected wire. Go to step 6).
  4. Measure resistance between speed sensor terminals. If resistance is less than 2500 ohms, go to next step. If resistance is more than 2500 ohms, replace speed sensor and go to step 6).
  5. Ensure all preceding diagnostic steps have been completed and involved wiring integrity has been verified. If steps have not been completed, return to last step completed. If all steps have been completed, replace control module and go to next step. If control module has already been replaced without resolution of problem, replace speed sensor and go to next step.
  6. Ensure ignition is off. Reconnect negative battery cable. Ensure all connectors are connected and secure. Retrieve trouble codes. See RETRIEVING TROUBLE CODES  . If Code 16 is present, go to CODE 16 under TEST DRIVE  . If Code 9 is present, go to next step. If any other trouble code is present, go to corresponding test for appropriate trouble code.
  7. Ensure all preceding diagnostic steps have been completed, and involved wiring integrity has been verified. If steps have not been completed, go to last diagnostic step completed and continue from there. If all diagnostic steps have been completed, go to next step.
  8. If previous diagnostic steps have been completed, problem is most likely wiring related. Go to INTERMITTENT DIAGNOSIS  and perform tests on all involved circuits. If problem is not resolved, go to step 5). If problem is resolved, repair is complete. Go to CODE 16 under TEST DRIVE  .
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