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Door Unlock Switch Failure Or All Doors Failing To Unlock From One Switch

WARNING: This page is about a different car, the 2002 Dodge Ram Wagon, 2002 Dodge Ram Van, 2001 Dodge Ram Wagon, and 2001 Dodge Ram Van. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This testing only applies to models with vehicle theft security system.

Possible Causes:

  1. Left Power Door Lock Switch (Shorted)
  2. Right Power Door Lock Switch (Shorted)
  3. Door Unlock Switch Output Circuit Shorted To Battery
  4. Power Door Lock Scan Tool Read (Switch Pressed)
  5. Fused B+ Circuit Open (Passengers)
  6. Right Power Door Lock Switch (Open)
  7. Door Lock Switch Output (Unlock) Circuit (Right)
  8. Fused B+ Circuit Open (Drivers)
  9. Left Power Door Lock Switch (Open)
  10. Door Lock Switch Output (Unlock) Circuit (Left)
  11. Fused B+ Circuit Open (Drivers)
  12. Fused B+ Circuit Open (Passengers)
  13. Left Power Door Lock Switch (Open)
  14. Right Power Door Lock Switch (Open)
  15. Door Lock Switch Output (Unlock) Circuit (Right)
  16. CTM Power Door Unlock Input Shorted High
  17. CTM Right Power Door Unlock Input Open
  18. CTM Left Power Door Unlock Input Open
  19. CTM Right Power Door Unlock Input Open

Testing

  1. Turn ignition on. Using scan tool, attempt to communicate with Central Timer Module (CTM) and Powertrain Control Module (PCM). If scan tool does not communicate with CTM and/or PCM, perform NO RESPONSE FROM CTM  or NO RESPONSE FROM PCM (CCD)  test(s) under COMMUNICATIONS. If scan tool communicates with CTM and PCM, go to next step.
  2. Using scan tool, record and clear Diagnostic Trouble Codes (DTC). Using scan tool, read POWER DOOR UNLOCK SWITCH status. If scan tool does not display POWER DOOR UNLOCK SW: PRESSED, go to step  6 . If scan tool displays POWER DOOR UNLOCK SW: PRESSED, go to next step.
  3. Gain access to and disconnect driver's side power door lock switch connector. See POWER DOOR LOCK SWITCH  under REMOVAL & INSTALLATION. Using scan tool, read POWER DOOR UNLOCK SWITCH status. If scan tool does not display POWER DOOR UNLOCK SW: PRESSED, replace driver's side power door lock switch. If scan tool displays POWER DOOR UNLOCK SW: PRESSED, go to next step.
  4. Gain access to and disconnect passenger's side power door lock switch connector. See POWER DOOR LOCK SWITCH  under REMOVAL & INSTALLATION. Using scan tool, read POWER DOOR UNLOCK SWITCH status. If scan tool does not display POWER DOOR UNLOCK SW: PRESSED, replace passenger's side power door lock switch. If scan tool displays POWER DOOR UNLOCK SW: PRESSED, go to next step.
  5. Turn ignition off. Disconnect CTM connector C2. Turn ignition on. Measure voltage between terminal No. 13 (Pink/Violet wire) at CTM connector C2 and ground. See Figure . If voltage is more than 1.5 volts, repair short to voltage in Pink/Violet wire. If voltage is 1.5 volts or less, replace CTM.
  6. Turn ignition on. Using scan tool, monitor POWER DOOR UNLOCK SW status. Press driver's side power door lock switch to unlock position, then release. Press passenger's side power door lock switch to unlock position, then release. If scan tool displays POWER DOOR UNLOCK SW: PRESSED with both power door lock switches pressed, system is currently functioning properly. If scan tool displays POWER DOOR UNLOCK SW: PRESSED only with driver's side power door lock switch pressed, go to next step. If scan tool displays POWER DOOR UNLOCK SW: PRESSED only with passenger's side power door lock switch pressed, go to step  10 . If scan tool does not display POWER DOOR UNLOCK SW: PRESSED with either power door lock switch pressed, go to step  13 .
  7. Gain access to and disconnect passenger's side power door lock switch connector. See POWER DOOR LOCK SWITCH  under REMOVAL & INSTALLATION. Measure voltage between terminal No. 3 (Red wire) passenger's side power door lock switch connector and ground. See Figure . If battery voltage is not present, repair open in Red wire. If battery voltage is present, go to next step.
  8. Reconnect passenger's side power door lock switch connector. Measure voltage between terminal No. 5 (Pink/Violet wire) and ground, by backprobing passenger's side power door lock switch connector. If battery voltage is present, replace passenger's side power door lock switch. See POWER DOOR LOCK SWITCH  under REMOVAL & INSTALLATION. If battery voltage is not present, go to next step.
  9. Turn ignition off. Disconnect CTM connector C2. Turn ignition on. Measure voltage of terminal No. 13 (Pink/Violet wire) at CTM connector C2 and ground, while pressing passenger's side power door lock switch to UNLOCK position. See Figure . If battery voltage is present, replace CTM. See CENTRAL TIMER MODULE  under REMOVAL & INSTALLATION. If battery voltage is not present, repair open in Pink/Violet wire.
  10. Gain access to and disconnect driver's side power door lock switch connector. Measure voltage between terminal No. 3 (Red wire) at driver's side power door lock switch connector and ground. See Figure . If battery voltage is not present, repair open in Red wire. If battery voltage is present, go to next step.
  11. Measure voltage between terminal No. 5 (Pink/Violet wire) and ground, by backprobing at driver's side power door lock switch connector while pressing driver's side power door lock switch to UNLOCK position. If battery voltage is not present, replace driver's side power door lock switch. If battery voltage is present, go to next step.
  12. Turn ignition off. Disconnect CTM connector C2. Ensure driver's side power door lock switch connector is connected. Measure voltage between terminal No. 13 (Pink/Violet wire) at CTM connector C2 and ground, while pressing driver's side power door lock switch to UNLOCK position. See Figure . If battery voltage is not present while pressing driver's side power door lock switch, replace driver's side power door lock switch. If battery voltage is present while pressing driver's side power door lock switch, go to next step.
  13. Gain access to and disconnect driver's side power door lock switch connector. Measure voltage between terminal No. 3 (Red wire) at driver's side power door lock switch connector and ground. See Figure . If battery voltage is not present, repair open in Red wire. If battery voltage is present, go to next step.
  14. Gain access to and disconnect passenger's side power door lock switch connector. Measure voltage between terminal No. 3 (Red wire) at passenger's side power door lock switch connector and ground. If battery voltage is not present, repair open in Red wire. If battery voltage is present, go to next step.
  15. Connect driver's side power door lock switch connector. Measure voltage between terminals No. 5 (Pink/Violet wire) at driver's side power door lock switch connector and ground. Press driver's side power door lock switch to UNLOCK position while monitoring voltage on DVOM. If battery voltage is not present while pressing driver's side power door lock switch, replace driver's side power door lock switch. If battery voltage is present while pressing driver's side power door lock switch, go to next step.
  16. Connect passenger's side power door lock switch connector. Measure voltage between terminals No. 5 (Pink/Violet wire) at passenger's side power door lock switch connector and ground. Press passenger's side power door lock switch to UNLOCK position while monitoring voltage. If battery voltage is not present while pressing passenger's side power door lock switch, replace passenger's side power door lock switch. If battery voltage is present while pressing passenger's side power door lock switch, go to next step.
  17. Turn ignition off. Disconnect CTM connector C2. Turn ignition on. Measure voltage between terminal No. 13 (Pink/Violet wire) at CTM connector C2 and ground. See Figure . Press passenger's side power door lock switch to UNLOCK position while monitoring voltage. If battery voltage is present while pressing passenger's side power door lock switch, replace CTM. See CENTRAL TIMER MODULE  under REMOVAL & INSTALLATION. If battery voltage is not present while pressing passenger's side power door lock switch, repair open in Pink/Violet wire.
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