Coolant Heater Inoperative
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Coolant Heater Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views |
|||
| 1 | Did you perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Engine Cooling |
| 2 | Test the engine coolant heater power supply cord for an open or short to ground. Refer to Circuit Testing
. Did you find a condition? |
Go to Step 3 | Go to Step 4 |
| 3 | Replace the engine coolant heater power supply cord. Refer to INTAKE MANIFOLD REMOVAL - LOWER (3.5L)
or INTAKE MANIFOLD REMOVAL - LOWER 93.9L)
. Did you complete the repair? |
Go to Step 6 | - |
| 4 | Inspect for poor connections at the harness connector of the engine coolant heater. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 6 | Go to Step 5 |
| 5 | Replace the engine coolant heater. Refer to INTAKE MANIFOLD REMOVAL - LOWER (3.5L)
or INTAKE MANIFOLD REMOVAL - LOWER 93.9L)
.. Did you complete the repair? |
Go to Step 6 | - |
| 6 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |