LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 2000 >> SC2 Automatic, MP6 >> Repair and Diagnosis >> Engine Mechanical >> Cooling Fan >> Engine Cooling Fan System - Troubleshooting >> Electric Cooling Fan Circuit Diagnosis >> 3.0L CATERA >> Auxiliary Engine Cooling Fan No. 2 Inoperative

Auxiliary Engine Cooling Fan No. 2 Inoperative

  1. Perform COOLING FAN SYSTEM CHECK . Go to next step.
  2. Turn ignition off. Connect fused jumper (5 amp) between fan control relay K26 diagnostic enable circuit and ground. If auxiliary engine coolant fan 1 and auxiliary engine coolant fan 2 operate at low speed, go to next step. If auxiliary engine coolant fan 1 and auxiliary engine coolant fan 2 do not operate at low speed, See AUXILIARY COOLING FANS NO. 1 & 2 INOPERATIVE .
    3. CAUTION: Installation of proper relay is critical. If an enhanced relay (equipped with a diode) is installed into a position requiring a standard relay (equipped without a diode) excessive current will damage any components associated with relay or its associated circuits.
  3. Turn ignition on, engine off. Remove fan control relay K28. Check battery voltage circuit (Red wire) of fan control relay K28 connector for short to ground or open. If problem was found, repair as necessary. After repairs, go to step  10. If problem was not found, go to next step.
  4. Check ignition voltage supply circuit (Brown wire) of fan control relay K28 connector for open. If problem was found, repair as necessary. After repairs, go to step  10. If problem was not found, go to next step.
  5. Check supply voltage circuit (Red/White wire) of auxiliary engine coolant fan 2 for open. If problem was found, repair as necessary. After repairs, go to step  10. If problem was not found, go to next step.
  6. Check control circuit (Brown/White wire) of relay coil of fan control relay K28 connector for open. If problem was found, repair as necessary. After repairs, go to step  10. If problem was not found, go to next step.
  7. Check diagnostic enable circuit (Brown/White wire) of fan control relay K28 for open. If problem was found, repair as necessary. After repairs, go to step  10. If problem was not found, go to next step.
  8. Check fan control relay K28 connector for poor connections. If problem was found, repair as necessary. After repairs, go to step  10. If problem was not found, go to next step.
  9. Replace fan control relay K28. After repairs, go to next step.
  10. Operate system to verify repair.
scientia non olet · About LEMON Manuals