Verify the customer's complaint.

Are the customer's concerns verified?

--

Go to Step 2

System OK

Does the blower run at any speed?

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Go to Step 12

Go to Step 3

1. Disconnect the power connector from the blower motor under the dashboard on the passenger side of the vehicle.
2. Turn ON the ignition.
3. Turn ON the blower.
4. Test the voltage on the connector. The terminal connected to the D-BLU/WH wire is positive and the terminal connected to the BK wire is negative.

Is the voltage within the specified range?

11-14 V

Go to Step 4

Go to Step 5

Replace the blower motor.

Did you complete the repair?

--

System OK

--

Inspect fuse F18 in the instrument panel (I/P) fuse block.

Is the fuse open?

--

Go to Step 6

Go to Step 7

1. Turn ON the ignition.
2. Use a short detector to locate the following possible short:

•	From the fuse F18 to terminal B3 of blower speed switch

•	From the blower speed switch to blower resister block

•	From the blower resister block to blower motor

•	From the blower switch to blower high relay

3. Repair any short.
4. Replace any open fuse.

Did you complete the repair?

--

System OK

--

1. Turn OFF the ignition.
2. Measure the resistance between terminal 1 of the blower motor and body.

Does the resistance measure within the specified value?

0 ohms

Go to Step 9

Go to Step 8

Repair the open circuit.

Did you complete the repair?

--

System OK

--

Measure the resistance between terminal 3 of the blower resister and terminal 2 of the blower motor.

Does the resistance measure within the specified value?

0 ohms

Go to Step 11

Go to Step 10

Repair the open circuit.

Did you complete the repair?

--

System OK

--

1. Using ohmmeter, measure continuity between terminal B3 of the blower speed switch and the following terminals.

•	At blower switch position 1, terminal 1 of the blower resister

•	At blower switch position 2, terminal 2 of the blower resister

•	At blower switch position 3, terminal 4 of the blower resister

•	At blower switch position 4, terminal 86 of the blower relay

2. Repair or replace the open circuit, blower switch, or blower resister.

Did you complete the repair?

--

System OK

--

Does the blower run except blower switch position 4?

--

Go to Step 13

Go to Step 14

1. Using an ohmmeter, measure continuity between terminal B3 of the blower speed switch and the following terminals:

•	At blower switch position 1, terminal 1 of the blower resister

•	At blower switch position 2, terminal 2 of the blower resister

•	At blower switch position 3, terminal 4 of the blower resister

2. Repair or replace the open circuit, blower switch, or blower resister.

Did you complete the repair?

--

System OK

--

Inspect fuse EF4 in the engine fuse block.

Is the fuse open?

--

Go to Step 15

Go to Step 16

1. Turn ON the ignition.
2. Use a short detector to locate the following possible short:

•	From the fuse EF4 to terminal 87 of the blowerrelay

•	From the terminal 30 of the blower relay to terminal 2 of the blower motor

3. Repair any short.
4. Replace any open fuse.

Did you complete the repair?

--

System OK

--

Using ohmmeter, measure the resistance between the following terminals:

Is the measurement within the specified value?

0 ohms

Go to Step 18

Go to Step 17

Repair the open circuit.

Did you complete the repair?

--

System OK

--

Replace the blower relay.

Did you complete the repair?

--

System OK

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