Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
If the condition is not present, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
DTC B0165 or B0166
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference
: HVAC Schematics Connector End View Reference: HVAC Connector End Views |
|||
| 1 | Did you perform the HVAC Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - HVAC Systems - Automatic |
| 2 |
|
Go to Step 3 | Go to Diagnostic Aids |
| 3 | Test the ignition 3 voltage circuit of the HVAC control module for an open or a high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 7 | Go to Step 4 |
| 4 | Test the ground circuit of the HVAC control module for an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 7 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 7 | Go to Step 6 |
| 6 | Replace the HVAC control module. Refer to HVAC Control Module Replacement . Did you complete the replacement? |
Go to Step 7 | - |
| 7 |
|
Go to Step 2 | System OK |