LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1217: Engine Over Temperature >> Overall Function Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Overall Function Check

Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be confirmed.

WARNING: Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pressure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up pressure to escape. Then turn the cap all the way off.

With CONSULT-II 

  1. Check the coolant level in the reservoir tank and radiator. Allow engine to cool before checking coolant level.  If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps and go to DIAGNOSTIC PROCEDURE  .
  2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to DIAGNOSTIC PROCEDURE  .
  3. Start engine and make sure that the cooling fan operates. If not, go to DIAGNOSTIC PROCEDURE  .
  4. Select "TARGET FAN RPM" in "ACTIVE TEST" mode with CONSULT-II.
  5. Change "TRGT FAN RPM" indication by touching "UP" and "DOWN", then make sure that the cooling fan operating speed changes according to "TRGT FAN RPM" indication.
  6. If the results are NG, go to DIAGNOSTIC PROCEDURE  .

Without CONSULT-II 

  1. Check the coolant level in the reservoir tank and radiator. Allow engine to cool before checking coolant level.  If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps and go to DIAGNOSTIC PROCEDURE  .
  2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to DIAGNOSTIC PROCEDURE  .
  3. Start engine.

    Be careful not to overheat engine. 

  4. Make sure that the cooling fan operates. If not, go to DIAGNOSTIC PROCEDURE  .
  5. Turn ignition switch OFF.
  6. Disconnect radiator coolant temperature sensor harness connector.
  7. Connect 2.2kΩ resistor to engine coolant temperature sensor harness connector.
  8. Restart engine and make sure that cooling fan operates at higher speed than the speed at step  4.

    Be careful not to overheat engine. 

  9. If NG, go to DIAGNOSTIC PROCEDURE 
scientia non olet · About LEMON Manuals