Operation CHARM
: Car repair manuals for everyone.
Home
>>
Buick
>>
1998
>>
Riviera V6-3.8L SC VIN 1
>>
Repair and Diagnosis
>>
Heating and Air Conditioning
>>
Testing and Inspection
>>
Reading and Clearing Diagnostic Trouble Codes
>>
Ignition Cycle Default
Ignition Cycle Default
Ignition Cycle Default
If no diagnostic trouble code occurs for 50 drive cycles (a drive cycle occurs when the ignition is turned "ON") any existing history DTCs are cleared from the HVAC programmers memory.