GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module (PCM) 3.4 Liter LA1

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition Switch in RUN/Engine running/Automatic Transmission in PARK/Air Conditioner is OFF

Commanded Fan 1/Commanded Fan 2

Eng 2, Cat

On/Off

Off

ECT

Eng 1, 2, EGR, EVAP, Cat, HO2S, Misfire, AIR

°C/°F

Varies

FC Relay 1

ODD

OK/Fault/Invalid State

OK

FC Relay 2 and 3

ODD

OK/Fault/Invalid State

OK