Step | Action | Value(s) | Yes | No | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 |
Is the action complete? | -- | -- | |||||||||||
2 |
Is the airflow low or no airflow out of the heater outlet? | -- | ||||||||||||
3 | Inspect for airflow out of defroster or vent outlets. Is the air flow low or no airflow out of the defroster or vent outlets? | -- | ||||||||||||
4 |
Is the air flow low or no airflow out of the defroster outlets? | -- | ||||||||||||
5 | Turn the blower speed from the following positions:
Does the blower motor speed increases at each speed level when blower speed is turned to HI and then decreases as the switch is moved towards LO? | -- | ||||||||||||
6 |
Is the action complete? | -- | -- | |||||||||||
7 |
Did you hear any airflow changes? | -- | ||||||||||||
8 | Turn the blower speed from the following positions:
Does the blower motor speed increases at each speed level when blower speed is turned to HI and then decreases as the switch is moved towards LO? | -- | ||||||||||||
9 |
Is the heater outlet temperature within specified value? | -- | ||||||||||||
10 | Cycle the temperature door actuators with scan tool. Did the temperature door actuators properly function? | -- | ||||||||||||
11 | Refer to DTC 10 Inside Air Temperature Sensor Voltage Low for temperature sensor diagnosis. Is the action complete? | -- | -- | |||||||||||
12 |
Does the inlet heater hose feel hot and the outlet heater hose feel warm? | -- | ||||||||||||
13 |
Is the heater hoses location reversed? | -- | ||||||||||||
14 |
Does the inlet heater hose fool hot and the outlet heater hose feel warm? | -- | ||||||||||||
15 | Inspect the thermostat for proper installation. Is the thermostat properly installed? | -- | ||||||||||||
16 | Inspect the mode door control and the stepper motors. Is the action complete? | -- | -- | |||||||||||
17 |
Is the action complete? | -- | -- | |||||||||||
18 | Refer to DTC 27 Blower Motor Voltage Low or Open Circuit for blower motor diagnosis. Is the action complete? | -- | -- | |||||||||||
19 |
Is the action complete? | -- | -- | |||||||||||
20 | Repair or replace the temperature door stepper motors. Is the action complete? | -- | -- | |||||||||||
21 | Reinstall the heater hoses in correct location. Is the action complete | -- | -- | |||||||||||
22 | Reinstall the thermostat. Refer to Thermostat Replacement in Engine Cooling. Is the action complete? | -- | -- | |||||||||||
23 | Replace the thermostat. Is the action complete? | -- | -- | |||||||||||
24 | Replace heater core. Refer to Air Conditioning Evaporator Core Replacement Is the action complete? | -- | -- | |||||||||||
25 | Inspect the temperature door stepper motors. Refer to DTC 16 Int Air Mix Door Mtr Volts Low/Open Circuit . Is the action complete? | -- | -- | |||||||||||
26 | Inspect for system obstructions between blower and system outlets. Is the action complete? | -- | -- | |||||||||||
27 | Perform the functional test. Is the action complete? | -- | System OK | -- |