Test SC-1B - Checking Speed Control Operation
- Turn ignition off. Using an external ohmmeter, check resistance of speed control brake switch output circuit (Dark Blue/Red wire) between speed control servo terminal No. 3 and ground. See Figure If resistance is greater than 5 ohms, repair short to ground in speed control brake switch output circuit.
- If resistance is less than 5 ohms, disconnect brake switch 6-pin connector. Check connector for damaged, pushed out or miswired terminals. Repair as necessary. Perform TEST SC-VER . If connector is okay, turn ignition on. Ensure speed control vent solenoid is still in activation mode.
- Using scan tool in voltmeter mode, probe brake switch connector terminal No. 4 (Dark Blue/Red wire). If voltage is less than 10 volts, go to step 5).
- If voltage is greater than 10 volts, turn ignition off. Using an external ohmmeter, check resistance between brake switch connector terminal No. 4 and speed control servo connector terminal No. 3, (Dark Blue/Red wire). See Figure. If resistance is greater than 5 ohms, repair open in Dark Blue/Red wire. Perform TEST SC-VER . If resistance is 5 ohms or less, replace brake switch. Perform TEST SC-VER .
- Ensure ignition is off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST SC-VER . If connectors and terminals are okay, go to next step.
- Using external ohmmeter, measure resistance of speed control power supply circuit (Yellow/Red wire) between PCM connector terminal C11 and brake switch connector terminal No. 3. See Figure and Figure .
- If resistance is 5 ohms or more, repair open in Yellow/Red wire. Perform TEST SC-VER . If resistance is less than 5 ohms, replace PCM. Perform TEST SC-VER .