Step | Action | Yes | No | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Caution: Refer to Radiator Cap Removal Caution in the Preface section. | |||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||||||
2 | Check the coolant level. Is the coolant level correct? | Go to Step 4 | Go to Step 3 | ||||||||
3 | Add coolant, as needed. Is the repair complete? | System OK | Go to Step 4 | ||||||||
4 | Check the timing belt for tension or damage. Is the timing belt OK? | Go to Step 6 | Go to Step 5 | ||||||||
5 | Correct any problem with the drive belts. Is the repair complete? | System OK | Go to Step 6 | ||||||||
6 | Check the coolant hoses for leaks or kinks. Are the coolant hoses OK? | Go to Step 8 | Go to Step 7 | ||||||||
7 | Repair any problem with the coolant hoses. Is the repair complete? | System OK | Go to Step 8 | ||||||||
8 | Check the surge tank cap. Is the surge tank cap OK? | Go to Step 10 | Go to Step 9 | ||||||||
9 | Repair or replace the surge tank cap, as needed. Is the repair complete? | System OK | Go to Step 10 | ||||||||
10 |
Is there heavy airflow from the heater outlet? | Go to Step 11 | Go to Step 26 | ||||||||
11 | Check for a change in the airflow at various blower speeds. Does the blower speed increase as the switch is turned from 1 to 4? | Go to Step 12 | Go to Blower Motor Malfunction | ||||||||
12 |
Is the coolant flow visible? | Go to Step 14 | Go to Step 13 | ||||||||
13 |
Are the repairs complete? | System OK | Go to Step 14 | ||||||||
14 |
Does the heater output meet the minimum values given? | Go to Step 15 | Go to Step 16 | ||||||||
15 |
Is the repair complete? | System OK | -- | ||||||||
16 |
Does the door slam? | Go to Step 18 | Go to Step 17 | ||||||||
17 |
Is the repair complete? | System OK | -- | ||||||||
18 |
Is the heater inlet hose hot and the heater outlet hose warm? | Go to Step 19 | Go to Step 22 | ||||||||
19 | Check the thermostat. Is the thermostat installed and seated properly? | Go to Step 20 | Go to Step 21 | ||||||||
20 | Replace the thermostat. Is the repair complete? | System OK | -- | ||||||||
21 | Reinstall the thermostat. Is the repair complete? | System OK | -- | ||||||||
22 | Inspect the heater hoses for proper installation. Are the heater hoses reversed? | Go to Step 23 | Go to Step 24 | ||||||||
23 | Reinstall the heater hoses properly. Is the repair complete? | System OK | -- | ||||||||
24 |
Is the heater inlet hose hot and the heater outlet hose warm? | System OK | Go to Step 25 | ||||||||
25 | Replace the heater core. Is the repair complete? | System OK | -- | ||||||||
26 | Recheck the system using the Control Settings/Correct Results tests. Is the repair complete? | System OK | Go to Step 27 | ||||||||
27 | Check for airflow from the defroster or the vent outlets. Is there high airflow from the defroster or vent outlets? | Go to Step 28 | Go to Step 29 | ||||||||
28 | Adjust the heater door at the floor and the vent door to get the proper airflow. Is the repair complete? | System OK | -- | ||||||||
29 | Switch the mode knob to defrost. Is the defroster airflow OK? | Go to Step 30 | Go to Step 31 | ||||||||
30 |
Is the repair complete? | System OK | -- | ||||||||
31 | Check for airflow change at various blower speeds. Does the blower speed increase as the control is turned from 1 to 4? | Go to Step 32 | Go to Blower Motor Malfunction | ||||||||
32 | Check for obstructions in the system at the blower inlet. Are there any obstructions? | Go to Step 33 | Go to Step 34 | ||||||||
33 | Remove the obstructions in the system at the blower inlet. Are the repairs complete? | System OK | -- | ||||||||
34 |
Does the airflow change? | Go to Step 35 | Go to Step 36 | ||||||||
35 |
Is the repair complete? | System OK | -- | ||||||||
36 |
Is the repair complete? | System OK | -- |