Inspection Procedure 4

Blower Fan And Motor Does Not Turn.

STEP 1. Check the blower relay continuity.







Follow the table to check the blower relay for 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 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.







Follow the table to check the blower switch for 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.

Standard Value:

Use an Ohmmeter to measure the resistance between the terminals as indicated. 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 How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction.)

NO: Go to Step 1.