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Test SC-4A: Checking Brake Switch Sense

NOTE: Perform TEST CS-1A: CHECKING SPEED CONTROL OPERATION  before proceeding.
  1. Disconnect brake switch connector. Using a DVOM, check voltage of brake switch sense circuit at brake switch connector. See BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION  table. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, go to step  3.
  2. Connect a jumper wire between brake switch sense circuit and ground at brake switch connector. See BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION  table. Using scan tool, read brake switch input status. If scan tool displays brake switch RELEASED, replace brake switch. Perform TEST VER-4A: SPEED CONTROL VERIFICATION . If scan tool does not display brake switch RELEASED, repair open ground circuit. Perform TEST VER-4A: SPEED CONTROL VERIFICATION .
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect connector for damaged or pushed out terminals. If connector is okay, go to next step. If connector is not okay, repair as necessary. Perform TEST VER-4A: SPEED CONTROL VERIFICATION .
  4. Using a DVOM, check resistance of brake switch sense circuit between PCM connector terminal No. 62 and ground. See PCM CONNECTOR WIRE IDENTIFICATION  table. 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 VER-4A: SPEED CONTROL VERIFICATION .
  5. Using a DVOM, check resistance of brake switch sense circuit between brake switch connector and PCM connector terminal No. 62. See BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION  table and PCM CONNECTOR WIRE IDENTIFICATION  table. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-4A: SPEED CONTROL VERIFICATION . If resistance is 5 ohms or more, repair open brake switch sense circuit to PCM. Perform TEST VER-4A: SPEED CONTROL VERIFICATION .
BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION

Application Wire Color
Brake Switch Sense Circuit White/Pink
Ground Circuit Black/Light Green
PCM CONNECTOR WIRE IDENTIFICATION

Application Wire Color
PCM Terminal No. 62
Brake Switch Sense Circuit White/Pink
PCM Terminal No. 50
Ground Circuit Black/Tan
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