Test SC-3A - Checking Speed Control Operation
- Disconnect brake switch connector. Check connector for damaged, pushed out or miswired terminals. Repair as necessary. Turn ignition on. Using scan tool in voltmeter mode, check voltage of brake switch sense circuit at brake switch connector terminal No. 1 (White/Pink wire). See Figure. If voltage is less than 10 volts, go to step 3).
- If voltage is more than 10 volts, connect a jumper wire between brake switch connector terminal No. 1 (White/Pink wire) and brake ground circuit at brake switch connector terminal No. 2 (Black wire). See Figure Using scan tool, read brake switch input status. If scan tool displays BRAKE SW RELEASED, replace brake switch. Perform TEST SC-VER . If scan tool does not display BRAKE SW RELEASED, repair open Black. Perform TEST SC-VER .
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Check connector for damaged, pushed out or miswired terminals. Repair as necessary. Perform TEST SC-VER . If connector is okay, go to next step.
- Using an external ohmmeter, check resistance of brake switch sense circuit between Gray PCM connector terminal C24, (Yellow/Red wire) and ground. If resistance is less than 5 ohms, repair short to ground in Yellow/Red wire. Perform TEST SC-VER .
- If resistance is greater than 5 ohms, check resistance of brake switch sense circuit between Gray PCM connector terminal C24, (Yellow/Red wire) and brake switch connector terminal No. 1 (White/Pink wire). If resistance is less than 5 ohms, replace PCM. Perform TEST SC-VER . If resistance is greater than 5 ohms, repair open check resistance of brake switch sense circuit. Perform TEST SC-VER .