INSPECTION PROCEDURE 4: Radiator Fan and Condenser Fan do not Change Speed or Stop: Diagnosis

Required Special Tool: 

MB991223: Harness Set

1. STEP 1. Check the fan control relay. 

   Refer to FAN CONTROLLER CHECK  .

   Q: Is the fan control relay in good condition? 

   YES  : Go to Step 2.

   NO:  Replace it. Go to  Step 5.

2. STEP 2. Check the harness wire between fan control relay connector A-09X terminal 2 and fan control module connector A-30 terminal 3 for damage. 

   Q: Is the harness wire in good condition? 

   YES  : Go to Step 3.

   NO:  Repair the damaged harness wire. Go to  Step 5.

   Fig 1: Checking Fan Control Relay Connector A-09X

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   Fig 2: Checking Fan Control Module Connector A-30

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3. STEP 3. Check fan control module connector A-30, intermediate connector C-06 and ECM connector C-109 < 2.4L-M/T > or C-111 < 3.0L-M/T >, or PCM connector C-110 < 2.4L-A/T > or C-112 < 3.0L-A/T > for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are the connectors and terminals in good condition? 

   YES  : Go to Step 4.

   NO:  Repair or replace the faulty components. (Refer to HARNESS CONNECTOR INSPECTION ). Go to  Step 5.

   Fig 3: Checking Fan Control Module Connector A-30

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   Fig 4: Checking Intermediate Connector C-06

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   Fig 5: Checking ECM Connector C-109

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4. STEP 4. Check the harness wires between fan control module connector A-30 terminal 2 and ECM connector C-109 terminal 21 < 2.4L-M/T > or C-111 terminal 18 < 2.4L-M/T >, or PCM connector C-110 terminal 18 < 2.4L-A/T > or C-112 terminal 18 < 3.0L-A/T > for damage. 

   Q: Are the harness wires between in good condition? 

   YES  : Check that the malfunction is eliminated. If the malfunction is eliminated, it can be assumed that this malfunction is intermittent. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ). If the malfunction is not eliminated, replace the fun control module (Refer to RADIATOR  ), then go to Step 5.

   NO:  Repair the damaged harness wires. Go to Step 5.

   Fig 6: Checking Fan Control Module Connector A-30

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   Fig 7: Checking ECM Connector C-109

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5. STEP 5. Retest the system. 

   Q: Do the radiator fan and condenser fan operate correctly? 

   YES  : The procedure is complete.

   NO:  Replace the ECM < M/T > or PCM < A/T >.