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Park/Neutral Position Switch Circuit

  1. Ensure starting system is operating normally. Check for starting system problems and repair as necessary. If starting system is okay, go to next step.
  2. Perform CANCEL SWITCHES  test under CRUISE CONTROL FUNCTION TEST under TROUBLE SHOOTING. If park/neutral position switch does not function as specified, go to next step. If park/neutral position switch functions as specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM TESTS , perform next test listed.
  3. Remove cruise control ECU with connector attached. See Figure. Turn ignition on. Measure voltage (backprobe) between ground and terminal No. 3 (Black/White wire) of cruise control ECU harness connector. See Figure. With shift lever in Drive, 10-16 volts should be present. With shift lever in any other position, voltage should be less than one volt. If voltage is not as specified, go to next step. If voltage is as specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM TESTS , perform next test listed.
  4. Check wiring harness and connectors between cruise control ECU and park/neutral position switch. Repair as necessary. If wiring harness and connectors are okay, replace cruise control ECU and retest system.