Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Heater Blower Controls System Check? | -- | Go to Step 2 | |
2 |
Does the shaft move with every knob step movement? | -- | Go to Step 3 | Go to Step 4 |
3 |
Is the vehicle reaching the normal operating temperature? | -- | Go to Step 5 | Go to Thermostat Diagnosis |
4 |
Did the test lamp light? | -- | Go to Step 6 | Go to Step 7 |
5 | Inspect the temperature control door mechanical condition for binding. Does any binding exist? | -- | Go to Step 16 | Go to Step 17 |
6 |
Did the test lamp light? | -- | Go to Step 8 | Go to Step 9 |
7 | Repair the open in CKT 141 (ORN) between the temperature control motor and S224. Is the repair complete? | -- | -- | |
8 |
Is the resistance less than the specified value? | 10 ohms | Go to Step 10 | Go to Step 11 |
9 | Repair the open in CKT 1050 (BLK) between the temperature control motor and ground G200. Is the repair complete? | -- | -- | |
10 |
Does the resistance vary within the specified range? | 0-10 Kohms | Go to Step 12 | Go to Step 13 |
11 | Repair the open in CKT 1050 (BLK) from the HVAC control module to G200. Is the repair complete? | -- | -- | |
12 | Use an ohmmeterJ 39200 in order to measure the resistance from the HVAC control module connector C2 CKT 733 (LT BLU) cavity F and the temperature control motor connector CKT 733 (LT BLU) cavity 8. Is the resistance less than the specified value? | 10 ohms | Go to Step 14 | Go to Step 15 |
13 | Replace the HVAC control module. Refer to Heater Module Replacement - Auxiliary. Is the replacement complete? | -- | -- | |
14 | Replace the temperature control motor. Is the replacement complete? | -- | -- | |
15 | Repair the open in CKT 733 (LT BLU) between the HVAC control module and the temperature control motor. Is the repair complete? | -- | -- | |
16 | Repair the cause of the binding. Is the repair complete? | -- | -- | |
17 | Repair restriction in coolant flow. Is the repair complete? | -- | -- |
