GM Service Manual Online
For 1990-2009 cars only
Table 1: Powertrain Control Module (PCM) 3.5 Liter (LX9)
Table 2: Engine Control Module (ECM) 3.6L (LY7)

Powertrain Control Module (PCM) 3.5 Liter (LX9)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off

ECT Sensor

Engine Data

Degrees

Varies

FC Relay 1 Command

Engine Data

ON/OFF

Varies

FC Relay 2 Command

Engine Data

ON/OFF

Varies

FC Relay 3 Command

Engine Data

ON/OFF

Varies

FC Relay 2 and 3 Command

Engine Data

ON/OFF

Varies

Ignition 1 Signal

Engine Data

Volts

Varies

Engine Control Module (ECM) 3.6L (LY7)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off

ECT Sensor

Engine Data 1, Engine Data 2 and Cooling/HVAC Data

Degrees

Varies

FC Relay 1 Command

Cooling/HVAC Data

OK/Fault/Invalid State

OK

FC Relay 2 and 3 Command

Cooling/HVAC Data

OK/Fault/Invalid State

OK