For 1990-2009 cars only
Fault Detection for Pontiac Bonneville 2000
The instrument panel module will not flash the heater and A/C control when a system fault occurs. The only alerts to the user that the HVAC system is not operating properly are:
| • | If the ambient air temperature sensor fails, the set temperature will display (instead of the outside air temperature) when the system is ON. |
| • | If only - - - is displayed on the heater and A/C control, this indicates a loss of communication between the instrument panel module and the heater and A/C control. |
