Operation CHARM
: Car repair manuals for everyone.
Home
>>
GMC Truck
>>
1999
>>
C 1500 Truck 2WD V8-5.3L VIN T
>>
Repair and Diagnosis
>>
Powertrain Management
>>
Computers and Control Systems
>>
Testing and Inspection
>>
Scan Tool Testing and Procedures
>>
Scan Tool Data, Normal Values and Definitions
>>
Scan Tool Data Definitions - Powertrain Systems
>>
Knock Retard
Knock Retard
The scan tool displays a range of
0.0°-16°.
knock Retard indicates the amount of spark the
PCM
removes from the IC spark advance in response to the signal from the
knock sensors
.