Hummer H3. Manual — part 1644

207

Shift Fork Shaft

208

Input Gear Thrust Bearing

209

Mainshaft

210

Oil Pump

211

Oil Pump Hose Clamp

212

Oil Pump Hose

213

Oil Pump Screen

214

Upper Center Bearing Support Thrust Washer

215

Bearing

216

Snap Ring

217

Center Bearing Support

218

Lower Center Support Bearing Thrust Washer

219

Shift Cam

220

Shift Shaft Torsional Spring

221

Shift Shaft Spacer

222

Shift Shaft

223

Inner Lockup Hub

224

Lockup Mode Shift Collar Assembly

225

Lockup Mode Shift Fork

226

Shift Fork Shaft Spring

227

Drive Sprocket Bushing

228

Drive Sprocket

229

Drive Chain

230

Front Output Sun Gear

231

Planetary Differential Assembly

232

Rear Output Shaft Thrust Washer

233

Rear Output Sun Gear

234

Mainshaft Rear Support Bushing

235

Rear Output Shaft

236

Rear Output Shaft Bearing Outer Retaining Ring

237

Rear Output Shaft Bearing

238

Rear Output Shaft Bearing Retaining Ring

239

Speed Sensor Tone Wheel

240

Front Output Shaft Rear Bearing

241

Driven Gear

242

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

DIAGNOSTIC INFORMATION AND PROCEDURES

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

DIAGNOSTIC STARTING POINT - TRANSFER CASE

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic
System Check will provide the following information:

The identification of the control module or modules that command the system.

The ability of the control module or modules to communicate through the serial data circuit.

The identification of any stored diagnostic trouble codes (DTCs) and the status of the codes.

The use of the Diagnostic System Check - Vehicle will identify the correct procedure for
diagnosing the system and where the procedure is located.

SCAN TOOL OUTPUT CONTROLS

Scan Tool Output Controls

Front Output Shaft

243

Front Output Shaft Front Bearing

DTC

Description

DTC B0790

Transfer Case Neutral Indicator Circuit Malfunction

DTC B2725

ATC Mode Switch Circuit Malfunction

DTC C0306

Motor A or B Circuit Malfunction

DTC C0327

Encoder Circuit Malfunction

DTC C0329

Encoder Signal Circuit Low

DTC C0359

Four Wheel Drive Low Range (4WD low) Discrete Output

Circuit Malfunction

DTC C0550

ECU Malfunction

Scan Tool Output

Control

Additional Menu

Selections

Description

Refer to the scan tool manual for complete scan tool operating instructions.

4WD High

Indicator Light

-

This function allows the technician to command the
4WD high indicator light, within the transfer case

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

SCAN TOOL DATA LIST

Scan Tool Data List

shift control switch, on or off.

4WD High Lock

Indicator Light

-

This function allows the technician to command the
4WD high lock indicator light, within the transfer
case shift control switch, on or off.

4WD Low Lock

Indicator Light

-

This function allows the technician to command the
4WD low lock indicator light, within the transfer
case shift control switch, on or off.

Differential Lock

Indicator Light

-

This function allows the technician to command the
differential indicator light, within the transfer case
shift control switch, on or off.

Motor A Driver -

High

-

This function allows the technician to request the
high side driver for the motor control A circuit, thus
allowing the technician to test the circuit and the
transfer case shift control module for their ability to
provide battery voltage to the motor.

Motor A Driver -

Low

-

This function allows the technician to request the
low side driver for the motor control A circuit, thus
allowing the technician to test the circuit and the
transfer case shift control module for their ability to
provide a ground path for the motor.

Motor B Driver -

High

-

This function allows the technician to request the
high side driver for the motor control B circuit, thus
allowing the technician to test the circuit and the
transfer case shift control module for their ability to
provide battery voltage to the motor.

Motor B Driver -

Low

-

This function allows the technician to request the
low side driver for the motor control B circuit, thus
allowing the technician to test the circuit and the
transfer case shift control module for their ability to
provide a ground path for the motor.

Neutral Indicator

Light

-

This function allows the technician to command the
neutral indicator light, within the transfer case shift
control switch, on or off.

Scan Tool Parameter

Data List

Units Displayed

Typical Data

Value

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

Engine is at Idle, Upper Radiator Hose is Hot, Closed Throttle, Gear is in Park or

Neutral and Accessories are OFF.

4WD High Indicator Light

Transfer Case

Data

On/Off

Off

4WD High Lock Indicator Light

Transfer Case

Data

On/Off

Off

4WD Low Active

Transfer Case

Data

Yes/No

No

4WD Low Lock Indicator Light

Transfer Case

Data

On/Off

Off

ATC Application

Transfer Case

Data

Number

Number

Encoder Circuit A

Transfer Case

Data

On/Off

On

Encoder Circuit B

Transfer Case

Data

On/Off

On

Encoder Circuit C

Transfer Case

Data

On/Off

On

Encoder Circuit P

Transfer Case

Data

On/Off

On

Encoder Gear Position

Transfer Case

Data

4WD High/4WD

Low/AWD

4WD High

Encoder Supply Voltage

Transfer Case

Data

Volts

2.55

Ign. Cycles Since Last Current
DTC

Transfer Case

Data

Count

Varies

Mode Switch Return Voltage

Transfer Case

Data

Volts

0-5 V

Mode Switch Selected

Transfer Case

Data

Transfer Case

Mode

Inactive

Motor A High Side Driver Status

Transfer Case

Data

On/Off

NO

Motor A Low Side Driver Status

Transfer Case

Data

On/Off

NO

Motor B High Side Driver Status

Transfer Case

Data

On/Off

NO

Motor B Low Side Driver Status

Transfer Case

On/Off

NO

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3