GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Power, Grounding, Generator and MIL


Object Number: 540479  Size: FS
Engine Controls Components
Powertrain Control Module Description
Data Link Connector
OBD II Symbol Description Notice
ECM B, HORN, HTD MIR Fuses, Horn and Fuel Pump Relays
Power and Grounding Connector End Views
ECM I Fuse
AUX PWR, RDO BATT, HDLP SW Fuses and Inadvertent Power Lamp Relay
ILLUM, RDO IGN and RDO BATT Fuses and VSS Signal
Power
Power
Handling ESD Sensitive Parts Notice
Automatic Transmission Valve Controls
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
G103 and G105 (2.2L)
Vehicle Speed Sensor Signal
Figure 2:

Data Link Connector


Object Number: 540483  Size: FS
Engine Controls Components
Serial Data Communications
MAP, IAT, TPS and ECT Sensors
Power, Grounding, Generator and MIL
INT BATT, PWR LKS, CTSY LP and CIGAR LTR Fuses
Cigar Lighter/Auxiliary Outlets Schematics
G200, G201 and G207
G103 and G105 (2.2L)
Power and Grounding Connector End Views
G103 and G105 (2.2L)
G103 and G105 (2.2L)
G103 and G105 (2.2L)
Power and Ground
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
SP201 (2.2L)
Figure 3:

MAP, IAT, TPS and ECT Sensors


Object Number: 540491  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Oxygen Sensors
Data Link Connector
OBD II Symbol Description Notice
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 4:

Oxygen Sensors


Object Number: 540494  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Vehicle Speed Sensor Signal
MAP, IAT, TPS and ECT Sensors
OBD II Symbol Description Notice
IGN C, IGN A Fuses and Ignition and Start Switch
Power and Grounding Connector End Views
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
G102
G103 and G105 (2.2L)
Vehicle Speed Sensor Signal
G103 and G105 (2.2L)
Figure 5:

Vehicle Speed Sensor Signal


Object Number: 540495  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Ignition Controls
Oxygen Sensors
OBD II Symbol Description Notice
Antilock Brake System Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
G103 and G105 (2.2L)
Figure 6:

Ignition Controls


Object Number: 540484  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Fuel Injectors and Fuel Pump
Vehicle Speed Sensor Signal
OBD II Symbol Description Notice
ECM I Fuse
Power and Grounding Connector End Views
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
G103 and G105 (2.2L)
Engine Controls Connector End Views
Handling ESD Sensitive Parts Notice
Figure 7:

Fuel Injectors and Fuel Pump


Object Number: 540489  Size: FS
Engine Controls Components
Fuel Metering System Description
Fuel Level and Fuel Tank Pressure Sensors
Ignition Controls
OBD II Symbol Description Notice
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Power and Grounding Connector End Views
G102
ECM B, HORN, HTD MIR Fuses, Horn and Fuel Pump Relays
Oxygen Sensors
Handling ESD Sensitive Parts Notice
Figure 8:

Fuel Level and Fuel Tank Pressure Sensors


Object Number: 540488  Size: FS
Engine Controls Components
Fuel Supply Component Description
EGR Valve, EVAP and IAC Controls
Fuel Injectors and Fuel Pump
OBD II Symbol Description Notice
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
SP201 (2.2L)
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 9:

EGR Valve, EVAP and IAC Controls


Object Number: 540510  Size: FS
Engine Controls Components
Evaporative Emission Control System Operation Description
Secondary A.I.R. Pump Control
Fuel Level and Fuel Tank Pressure Sensors
OBD II Symbol Description Notice
Power and Grounding Connector End Views
ENG I and OXYSEN Fuses
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 10:

Secondary A.I.R. Pump Control


Object Number: 538569  Size: FS
Engine Controls Components
Powertrain Control Module Description
Brake Switch Input
Fuel Level and Fuel Tank Pressure Sensors
OBD II Symbol Description Notice
Power and Grounding Connector End Views
B+ Bus Bar
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Engine Controls Connector End Views
Figure 11:

A/C Compressor Controls


Object Number: 540517  Size: FS
Engine Controls Components
Powertrain Control Module Controlled Air Conditioning Description
Brake Switch Input
Secondary A.I.R. Pump Control
OBD II Symbol Description Notice
B+ Bus Bar
Power and Grounding Connector End Views
IGN C, IGN A Fuses and Ignition and Start Switch
G102
Oxygen Sensors
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
RAP, IGN B Fuses and Ignition Switch
RPO C60
HVAC Connector End Views
Figure 12:

Brake Switch Input


Object Number: 540512  Size: FS
Engine Controls Components
Powertrain Control Module Description
Automatic Transmission Switch Inputs
A/C Compressor Controls
OBD II Symbol Description Notice
Power and Ground
Clutch Pedal Position Switch and Stoplamp Switch
Power and Ground
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
Figure 13:

Automatic Transmission Switch Inputs


Object Number: 540516  Size: FS
Engine Controls Components
Powertrain Control Module Description
Automatic Transmission Valve Controls
Brake Switch Input
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
G103 and G105 (2.2L)
G103 and G105 (2.2L)
Vehicle Speed Sensor Signal
Figure 14:

Automatic Transmission Valve Controls


Object Number: 540515  Size: FS
Engine Controls Components
Powertrain Control Module Description
Automatic Transmission Switch Inputs
OBD II Symbol Description Notice
Power
Power, Grounding, Generator and MIL
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice