Cylinder Lock Switch Failure/Lock
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:
Perform BODY VERIFICATION TEST
under VERIFICATION TESTS after each repair
Monitored & Set Condition
- When Monitored: Continuously.
- Set Condition: If the CTM detects that the cylinder lock (MUX) switch remains in the LOCK position longer than 30 seconds.
Possible Causes:
- Door Key Cylinder Mechanical Malfunction
- Defective Driver Lock Switch
- Defective Passenger Lock Switch
- Cylinder Lock Switch MUX Circuit Short To Ground
- Defective CTM Lock
Testing
- Turn ignition on. Using scan tool, select THEFT ALARM, VTSS, SENSORS then read CYLINDER LOCK SW voltage. If voltage is more than 2.8 volts, go to next step. If voltage is less than 2.8 volts, go to step 3 .
- Insert key into suspect door key cylinder. Using key, lock and unlock door several times. If door switch moves freely, go to next step. If door switch does not move freely, repair or replace suspect door key cylinder assembly.
- Turn ignition off. Access and disconnect driver's side door key cylinder switch connector. Turn ignition on. Using scan tool, read CYLINDER LOCK SW voltage. If voltage is less than 2.8 volts, go to next step. If voltage is more than 2.8 volts, replace driver's side door key cylinder switch.
- Turn ignition off. Access and disconnect passenger's side door key cylinder switch connector. Turn ignition on. Using scan tool, read CYLINDER LOCK SW voltage. If voltage is less than 2.8 volts, go to next step. If voltage is more than 2.8 volts, replace passenger's side door key cylinder switch.
- Turn ignition off. Disconnect Central Timer Module (CTM) connector C2. Using a DVOM, measure resistance of suspect cylinder lock switch MUX circuit between CTM connector C2 terminal No. 9 (driver) or No. 10 (passenger) and ground. See Figure . If resistance is less than 1000 ohms, repair short to ground in suspect cylinder lock switch MUX circuit. If resistance is more than 1000 ohms, replace CTM.