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DTC P1717 - A/T Drive Range (Park/Neutral Position) Signal CKT Malfunction

  1. Turn ignition on. Using a voltmeter, measure voltage (backprobe) between ground and PCM connector "C", terminal No. 5. If reading is 10-14 volts with gear selector in any position, go to next step. If reading is 10-14 volts with gear selector in either "R", "D", "2" or "L" position, check Transmission Range Sensor (TRS) and circuits. See appropriate lemon-25(R) manual. If reading is 0-1 volt with gear selector in either "R", "D", "2" or "L" position, check for an intermittent problem. See TESTS W/O CODES article.
  2. Turn ignition off. Disconnect TCM connectors. Turn ignition on. Using a voltmeter, measure voltage between ground and terminal No. 10 (Gray/Red wire) of TCM connector. If reading is 10-14 volts, go to next step. If reading is not as specified, check Gray/Red wire between PCM and TCM for an open or poor connection. Repair as necessary. If wire is okay, replace PCM. Retest system.
  3. Check for poor connection at TRS, misadjusted TRS, or open Black/White wire between TRS and ignition switch. Repair as necessary. If connections and adjustment is okay, replace TCM. Retest system.
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