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 article.
  - 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 article.
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), Harness Side 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 INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES article. 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.