GM Service Manual Online
For 1990-2009 cars only
Table 1: Powertrain Control Module (PCM) 3.5L/LX9 or Engine Control Module (ECM) 3.9L/LZ9
Table 2: Powertrain Control Module (PCM) 2.2L/L61

Powertrain Control Module (PCM) 3.5L/LX9 or Engine Control Module (ECM) 3.9L/LZ9

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

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

ECT

Inputs/Outputs

°C/°F

Varies

FC Relay 1 Command

Outputs

ON/OFF

OFF

FC Relays 2 and 3 Command

Outputs

ON/OFF

OFF

Powertrain Control Module (PCM) 2.2L/L61

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

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

ECT

Inputs/Outputs

°C/°F

Varies

FC Relay 1 Command

Outputs

ON/OFF

OFF

FC Relays 2 and 3 Command

Outputs

ON/OFF

OFF