Test SC-4A - Checking Brake Switch Sense
WARNING: This page is about a different car, the 1996 Eagle Vision, 1996 Dodge Intrepid, 1996 Chrysler New Yorker, 1996 Chrysler LHS, and 1996 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Perform TEST SC-1A before proceeding.
- Turn ignition off. Disconnect brake switch connector. Brake switch connector is located near top of brake pedal. Turn ignition on. Using scan tool in voltmeter mode, check voltage of brake switch sense circuit at brake switch connector. Refer to BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION . If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, go to step 3).
- Connect a jumper wire between brake switch sense circuit and ground circuit at brake switch connector. Refer to BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION . Using scan tool, read brake switch input status. If scan tool displays RELEASED, replace brake switch. Perform TEST SC-VER . If scan tool does not display RELEASED, repair open ground circuit. Perform TEST SC-VER .
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector for damaged or pushed out terminals. Repair as necessary. Perform TEST SC-VER . If wiring and connectors are okay, go to next step.
- Using scan tool in ohmmeter mode, check resistance of brake switch sense circuit at brake switch connector. Refer to the BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION . If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on brake switch sense circuit. Perform TEST SC-VER .
- Using an external ohmmeter, check resistance of brake switch sense circuit between brake switch connector and PCM connector terminal No. 62. If resistance is less than 5 ohms, replace PCM. Perform TEST SC-VER . If resistance is 5 ohms or more, repair open brake switch sense circuit. Perform TEST SC-VER .