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

Engine Control Module (ECM) Power, Ground, Serial Data, MIL


Object Number: 1860256  Size: FS
Master Electrical Component List
Control Module References
MAF, ECT IAT, MAP, IMT Valve Position Sensor, Rough Road Wheel Speed Sensor
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
DLC Schematics
G103, G105, G201
G302
Figure 2:

MAF, ECT, IAT, MAP, Intake Manifold Tuning Valve Position, Rough Road Wheel Speed Sensors


Object Number: 1860257  Size: FS
Master Electrical Component List
Control Module References
EVAP Solenoids, IMT Valve Solenoid, FTP Sensor
Engine Control Module, Power and Ground, Serial Data, Malfunction Indicator Lamp
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Transmission Control Module (TCM) Power, Ground, Serial Data, Hold Mode Indicator Control
Manual Transmission Schematics - 2.0L MR-140
G301
G202 (1 of 2)
Figure 3:

EVAP Vent and Purge Valves, EGR Valve, Intake Manifold Tuning Valve, FTP Sensor


Object Number: 1860259  Size: FS
Master Electrical Component List
Control Module References
CKP, CMP, Knock Sensors
MAF, ECT IAT, MAP, IMT Valve Position Sensor, Rough Road Wheel Speed Sensor
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Blower Controls
Blower Controls
Figure 4:

CMP, CKP, Knock Sensors


Object Number: 1860262  Size: FS
Master Electrical Component List
Control Module References
Heated Oxygen Sensors
EVAP Solenoids, IMT Valve Solenoid, FTP Sensor
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Figure 5:

Heated Oxygen Sensors


Object Number: 1860263  Size: FS
Master Electrical Component List
Control Module References
Accelerator Pedal Position Sensors, TP Sensors, Throttle Actuator Control Motor
CKP, CMP, Knock Sensors
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Figure 6:

Accelerator Pedal Position Senor, TP Sensor, Throttle Actuator Control Motor


Object Number: 1860260  Size: FS
Master Electrical Component List
Control Module References
Ignition Coils (1 of 2)
Heated Oxygen Sensors
Figure 7:

Ignition Coils (1 of 2)


Object Number: 1860264  Size: FS
Master Electrical Component List
Control Module References
Ignition Coils (2 of 2)
Accelerator Pedal Position Sensors, TP Sensors, Throttle Actuator Control Motor
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Ignition Coils (2 of 2)
Ignition Coils (2 of 2)
Ignition Coils (2 of 2)
G104
Figure 8:

Ignition Coils (2 of 2)


Object Number: 1860266  Size: FS
Master Electrical Component List
Control Module References
Fuel Pump and Fuel Injectors
Ignition Coils (1 of 2)
Ignition Coils (1 of 2)
Ignition Coils (1 of 2)
Ignition Coils (1 of 2)
Figure 9:

Fuel Pump and Injectors


Object Number: 1860267  Size: FS
Master Electrical Component List
Control Module References
Controlled/Monitored Subsystem References
Ignition Coils (2 of 2)
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
Alternator, EF1, EF3, EF5, EF18, EF19, EF27, EF30, EF33 Fuses
G303
Figure 10:

Controlled/Monitored Subsystem References


Object Number: 1860268  Size: FS
Master Electrical Component List
Control Module References
Fuel Pump and Fuel Injectors
Park Lamps
Power, Ground and Gages
Engine Cooling Schematics
Blower Controls
Blower Controls