GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Impala 🢒 Engine 🢒 Engine Cooling 🢒 Scan Tool Data List
Table 1: Powertrain Control Module (PCM) 3.4 Liter (LA1)
Table 2: Powertrain Control Module (PCM) 3.8 Liter (L36, L67)

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

ECT Sensor

Eng 1, 2, EGR, EVAP, Fuel Trim, Misfire

°C/°F

Varies

FC Relay 1 Command

Eng 2

On/Off

Varies

FC Relay 2 and 3 Command

Eng 2

On/Off

Varies

FC Relay 1 Circuit Status

ODM

Fault/OK

OK

FC Relay 2 and 3 Circuit Status

ODM

Fault/OK

OK

Powertrain Control Module (PCM) 3.8 Liter (L36, L67)

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 Sensor

Eng 1, 2, EGR, EVAP, Fuel Trim, Misfire

°C/°F

Varies

FC Relay 1 Command

ENG2, Cat

On/Off

Varies

FC Relay 2 and 3 Command

ENG2, Cat

On/Off

Varies

FC Relay 1 Circuit Status

ODD

Fault/OK

OK

FC Relay 2 and 3 Circuit Status

ODD

Fault/OK

OK