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Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Tests W/Codes - Non-Turbo (M/T) - MOTRONIC 4.4) >> Circuit Tests >> DTC 514 - Engine Cooling Fan Half Speed

DTC 514 - Engine Cooling Fan Half Speed

WARNING: This page is about a different car, the 1996 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using Volvo Scan Tool (998-8686 ), read off status message. If message PERMANENT FAULT, SIGNAL TOO HIGH is displayed, go to next step. If PERMANENT FAULT, SIGNAL TOO LOW is displayed, go to step 3). If PERMANENT FAULT, SIGNAL MISSING is displayed, go to step 4). If INTERMITTENT FAULT, SIGNAL TOO HIGH is displayed, go to step 8). If INTERMITTENT FAULT, SIGNAL TOO LOW is displayed, go to step 9). If INTERMITTENT FAULT, SIGNAL MISSING is displayed, go to step 10).
  2. If PERMANENT FAULT, SIGNAL TOO HIGH is displayed, turn ignition off. Disconnect connector "B" from Fuel Control (FC) relay. Turn ignition on. Connect voltmeter between FC relay connector "B", terminal No. 1, and ground. If voltmeter reads about 6 volts, retest using new FC relay. If voltmeter does not read about 6 volts, check wiring between FC relay connector "B", terminal No. 1, and ECM connector terminal A7 for a short circuit to voltage.
  3. IF PERMANENT FAULT, SIGNAL TOO LOW is displayed, turn ignition off. Disconnect connector "B" from Fuel Control (FC) relay. Connect voltmeter between FC relay connector "B" terminal No. 1 and ground. If voltmeter reads about 6 volts, replace FC relay. If voltmeter does not read about 6 volts, check wiring between FC relay terminal B1 and ECM connector terminal A7 for a short circuit to ground.
  4. If PERMANENT FAULT, SIGNAL MISSING is displayed, turn ignition off. Disconnect connector "A" from FC relay. Connect voltmeter between FC relay connector "A" and ground. If voltmeter reads battery voltage, go to next step. If voltmeter does not read battery voltage, check fusible link between starter motor and FC relay.
  5. Turn ignition off. Disconnect FC relay connector "A". Disconnect FC relay connector "B". Turn ignition on. Connect voltmeter between relay connector "B" terminal No. 1 and ground. If voltmeter reads about 6 volts, go to next step. If voltmeter does not read about 6 volts, check ECM connector for good terminal contact. Repair as necessary. Repeat test. If voltage is now correct, DTC was caused by poor terminal contact. If voltage is still not correct, check wiring between FC relay terminal B1 and ECM connector terminal A7 for an open circuit.
  6. Turn ignition on. Connect voltmeter between relay connector "B" terminal No. 2 and ground. If voltmeter reads about 3 volts, go to next step. If voltmeter does not read about 3 volts, check wiring between FC relay connector "B" terminal No. 2 and ECM connector terminal A22 for a short circuit to ground.
  7. Turn ignition off. Ensure connectors "A" and "B" are connected to FC relay. Start engine and run at idle. Using Volvo Scan Tool (998-8686 ), read off status message. If status message is PERMANENT, SIGNAL TOO LOW, retest using new FC relay. If status message is intermittent, source of DTC is poor contact in FC relay and/or ECM connector. Ensure connector terminals are clean and free of oxidation.
  8. If INTERMITTENT FAULT, SIGNAL TOO HIGH is displayed, check wiring between FC relay connector "B", terminal No. 1 , and ECM connector terminal A7 for an intermittent short circuit to voltage.
  9. If INTERMITTENT FAULT, SIGNAL TOO LOW is displayed, check wiring between FC relay connector "B", terminal No. 1 , and ECM connector terminal A7 for an intermittent short circuit to ground.
  10. If INTERMITTENT FAULT, SIGNAL MISSING is displayed, check all connectors for poor terminal contact. Repair as necessary. Also check wiring between FC relay "B" terminal No. 1 and ECM connector terminal A7 for an intermittent open circuit. Check wiring between FC relay "A" terminal No. 1 and starter motor for an intermittent open circuit. Check wiring between FC relay "B" terminal No. 2 and ECM connector terminal A22 for an intermittent short to ground.
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