Inspection Procedure 4

Blower Fan and Motor does not Turn.

DIAGNOSIS

STEP 1. Check the blower relay continuity.

Q: Is the blower relay continuity in good condition?

YES: Go to Step 2.
NO : Replace. Then go to Step 5.




STEP 2. Check the blower fan and motor operation. When battery voltage is applied between the terminals, check that the blower fan and motor operates.

Q: Is there any abnormal noise?

YES: Go to Step 3.
NO: Replace. Then go to Step 5.




STEP 3. Check the blower switch continuity.

Q: Is the blower switch continuity in good condition?

YES: Go to Step 4.
NO: Replace. Then go to Step 5.




STEP 4. Check the resistor resistance value.
Use an ohmmeter to measure the resistance between the terminals as indicated below. Check that the measured value is at the standard value.

Q: Is the measured value at the standard value?

YES: Go to Step 5.
NO: Replace. Then go to Step 5.

STEP 5. Check symptoms.

Q: Is the blower fan and motor turned?

YES: This diagnosis is complete. (If no malfunctions are not found in all steps, an intermittent malfunction is suspected. Refer to Introduction, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction)
NO: Go to Step 1.