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General Information: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item Detecting Condition Possible cause
DTC Strategy
  • Monitor short to ground, to battery or open circuit
  1. Poor connection
  2. Open in Power circuit to cooling fan module
  3. Open or short in control circuit to ECM
  4. Faulty Fan Relay
  5. Faulty cooling fan module
  6. Faulty ECM
Enable Conditions
  • No disabling Faults Present
  • Engine Running
  • 11V ≥ Ignition Voltage ≥ 16V
Threshold value
  • Open or short on Fan Circuit (Low)
Diagnosis Time
  • Continuous (More than 5sec. failure for every 10 sec. test.)
MIL On Condition
  • 2 driving cycles
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