Hummer H1 (2006+). Manual — part 48

OBD-36

On-Board Diagnostics

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ECM SCHEMATICS

See the following Figures for ECM Schematics on:

• Fuel Selector Valve (Figure OBD-4)

• Accelerator Position Pedal (Figure OBD-5)

• Fuel Injectors (Figure OBD-6)

• Glow Plug Control Module (Figure OBD-7)

• Diagnositc Link Connector (Figure OBD-8)

• EGR Solenoid (Figure OBD-9)

• Camshaft and Cranshaft Sensors (Figure OBD-10)

• Mass Air Flow/Air Intake Temperature Sensors (Figure OBD-11)

• Coolant Temperature, Fuel Temperature and Boost Sensors (Figure OBD-12)

• Oil Pressure Sensor (Figure OBD-13)

• Turbo Vane Postition Sensor (Figure OBD-14)

• Fuel Pressure Sensor (Figure OBD-15)

P2610

Engine Control Module Ignition Off Timer Performance

B

Yes

P2636

Fuel Transfer Pump Flow Insufficient

D

No

P2771

Four Wheel Drive (4WD) Low Switch Circuit

B

Yes

P2810

Solenoid G Electrical

B

Yes

U0073

High Speed CAN Communication Bus

B

Yes

U0100-
U0299

Lost Communication

B

Yes

Diagnostic Trouble Code (DTC) Identification (Continued)

DTC

Description

Type

Illuminate MIL

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On-Board Diagnostics OBD-37

5745804

Figure OBD-4: Fuel Selector Valve

OBD-38

On-Board Diagnostics

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Figure OBD-5: Accelerator Position Pedal

11-1-05

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On-Board Diagnostics OBD-39

5745804

Figure OBD-6: Fuel Injectors