1

1. Turn ON the ignition.
2. Observe the temperature indication screen of the controller.

Does the digit flash?

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Go to Step 2

Go to Step 3

Run a self-diagnosis circuit check.

Does the display indicate a defect code?

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Go to appropriate DTC table

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1. Turn ON the ignition.
2. Measure the voltage between ground and terminal 2 of the blower motor.

Does the voltage measure within the specified value?

11-14 V

Go to Step 4

Go to Step 5

Measure the voltage between ground and terminal B12 at the ACT switch.

Does the voltage measure within the specified value?

11-14 V

Go to Step 6

Go to Step 12

Repair any problem found in terminal 2 at the blower motor circuit or ground G203.

Did you complete the repair?

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System OK

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Measure the resistance between the connector terminals on the blower motor.

Does the resistance measure equal to the specified value?

5 ohms

Go to Step 8

Go to Step 7

Replace the blower motor.

Did you complete the repair?

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System OK

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1. Turn OFF the ignition.
2. Using an ohmmeter, measure the resistance between terminal 1 of the blower motor and terminal 2 of the power transistor.

Does the resistance measure equal to the specified value?

0 ohms

Go to Step 10

Go to Step 9

Repair the circuit between terminal 1 of the blower motor and terminal 2 of the power transistor.

Did you complete the repair?

--

System OK

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Measure the resistance between terminal 2 of the power transistor connector to ground

Does the resistance measure equal to the specified value?

0 ohms

Go to Step 11

Go to Step 12

1. Trace the circuit from terminal 2 of the power transistor connector to ground G203.
2. Repair any problem found in the circuit to ground G203.

Did you complete the repair?

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System OK

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Replace the ATC controller.

Did you complete the repair?

--

System OK

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