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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 park/neutral position switch test. See  CANCEL SWITCHES under CRUISE CONTROL FUNCTION TEST under TROUBLE SHOOTING. If park/neutral position switch input signal is not as specified, go to next step. If park/neutral position switch input signal is as specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM DIAGNOSIS, perform next test listed.
  3. Remove the cruise control ECU with connector connected. See Figure. Turn ignition switch to ON position. Using voltmeter positive lead, backprobe cruise control ECU connector terminal No. 13 (Light Green wire) with negative lead to ground. With shift lever in Drive, battery voltage 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 DIAGNOSIS, 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.
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