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Test NTC-20A: Checking Park/Neutral Position Switch

NOTE: Perform TEST TC-114A , TEST NTC-1A  or TEST NTC-12A  before proceeding.
NOTE: Avenger, Breeze, Cirrus, Sebring Coupe, Sebring Convertible, Stratus and Talon are equipped with a transmission range sensor. Neon is equipped with a park/neutral switch.
  1. Using scan tool, read park/neutral switch input state. Observe scan tool display while moving gear selector in and out of Park and Reverse. If scan tool displayed P/N and D/R, park/neutral switch is functioning properly. Test is complete. If scan tool did not display P/N and D/R, go to next step.
  2. Put gear selector in Park. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an ohmmeter, connect ohmmeter lead to Park/Neutral switch sense circuit at PCM connector terminal No. 76. See PCM CONNECTOR WIRE IDENTIFICATION  table. While observing resistance reading, move gear selector in and out of Park and Reverse. If resistance switched from less than 5 ohms to more than 5 ohms, replace PCM. Perform TEST VER-2A . If resistance did not switch from less than 5 ohms to more than 5 ohms, go to next step.
  3. If resistance stayed less than 5 ohms all the time, repair short to ground on Park/Neutral switch sense circuit. Perform TEST VER-2A . If resistance did not stay less than 5 ohms all the time, go to next step.
  4. If vehicle is an Avenger, Breeze, Cirrus, Sebring Coupe, Sebring Convertible, Stratus or Talon, go to step 6)  . If vehicle is a Neon, go to next step.
  5. Disconnect park/neutral switch connector. Using an ohmmeter, check resistance of park/neutral switch sense circuit between 3-pin park/neutral switch connector and PCM connector terminal No. 76. See PCM CONNECTOR WIRE IDENTIFICATION  table for wire color identification on PCM connector and 3-pin park/neutral switch connector. If resistance is less than 10 ohms, replace park/neutral switch. Perform TEST VER-2A . If resistance is 10 ohms or more, repair open park/neutral switch sense circuit. Perform TEST VER-2A .
  6. Disconnect Transmission Range Sensor (TRS) connector. Using an ohmmeter, check resistance of park/neutral switch sense circuit between 10-pin TRS connector and PCM connector terminal No. 76. See PCM CONNECTOR WIRE IDENTIFICATION  table for wire color identification on PCM connector and 10-pin TRS connector. If resistance is less than 10 ohms, replace TRS. Perform TEST VER-2A . If resistance is 10 ohms or more, repair open park/neutral switch sense circuit. Perform TEST VER-2A .
PCM CONNECTOR WIRE IDENTIFICATION

Application Wire Color
PCM Terminal No. 76 (Park/Neutral Switch Sense Circuit)
Avenger, Sebring Coupe & Talon Black/Yellow
Breeze, Cirrus, Sebring Conv. & Stratus Black/White
Neon Brown/Yellow
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