Pinpoint Test K: The Traction Control System Is Inoperative

NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

K1 CHECK FOR ANY COMMUNICATION DTCs
- Connect the scan tool.
- Ignition ON.
- Check the IC , the PCM and the ABS module for any communication DTCs.
- Are any communication DTCs present?
- Yes: For ABS DTCs, GO to the ABS MODULE DTC CHART .
  For IC and PCM DTCs, REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES .
- No: GO to K2 .
K2 CHECK FOR ANY IC NON-COMMUNICATION DTCs
- Check the IC for any non-communication DTCs.
- Is DTC C1093 present?
- Yes: GO to K6.
- No: If no DTCs are present, GO to K3 .
  For all other IC DTCs, REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES .
K3 CHECK FOR VOLTAGE AT THE TRACTION CONTROL SWITCH
- Ignition OFF.
- Disconnect: Traction Switch C280.
- Ignition ON.
- Measure the voltage between traction control switch C280-7, circuit CCA15 (YE/GY), harness side and ground.
  
  Fig 1: Measuring Voltage Between Traction Control Switch C280-7, Circuit CCA15 (YE/GY), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to K4 .
- No: GO to K5.
K4 CHECK THE SWITCH GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between traction control switch C280-1, circuit GD134 (BK/VT), harness side and ground.
  
  Fig 2: Measuring Resistance Between Traction Control Switch C280-1, Circuit GD134 (BK/VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to K7.
- No: REPAIR circuit GD134 (BK/VT). TEST the system for normal operation.
K5 CHECK THE SWITCH CONTROL CIRCUIT FOR AN OPEN
- Disconnect: IC C220.
- Measure the resistance between traction control switch C280-7, circuit CCA15 (YE/GY), harness side and IC C220-22, circuit CCA15 (YE/GY), harness side.
  
  Fig 3: Measuring Resistance Between Traction Control Switch C280-7, Circuit CCA15 (YE/GY) And IC C220-22, Circuit CCA15 (YE/GY)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to K6 .
- No: REPAIR circuit CCA15 (YE/GY). TEST the system for normal operation.
K6 CHECK THE SWITCH CONTROL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Traction Control Switch C280 (if not previously disconnected).
- Measure the resistance between traction control switch C280-7, circuit CCA15 (YE/GY), harness side and ground.
  
  Fig 4: Measuring Resistance Between Traction Control Switch C280-7, Circuit CCA15 (YE/GY), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: REPAIR circuit CCA15 (YE/GY). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
- No: GO to K7 .
K7 CHECK THE TRACTION CONTROL SWITCH
- Measure the resistance between traction control switch C280 pin-7 and pin-1, component side, while pressing and releasing the switch.
- Is the resistance less than 5 ohms with the switch pressed and greater than 10,000 ohms with the switch released?
- Yes: GO to K8 .
- No: INSTALL a new traction control switch. REFER to TRACTION CONTROL SWITCH . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
K8 CHECK FOR CORRECT IC OPERATION
- Check IC C220 for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: IC C220.
- Make sure the connector is seated correctly, then operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new IC . REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.