Hummer H2. Manual — part 2449

range switch to the PCM. HI indicates an ignition voltage input to the PCM. LOW indicates a zero
voltage input to the PCM.

Traction Control

Displays Active or Inactive. When the PCM receives a request for torque reduction from the electronic
brake traction control module (EBTCM) Active is displayed.

Trans. Fluid Temp.

This parameter is the input signal of the transmission fluid temperature sensor. Transmission fluid
temperature is high 151°C (304°F) when signal voltage is low, 0 V, and transmission fluid temperature is
low -40°C (-40°F ) when signal voltage is high, 5 V.

Trans. Slip Counter

Displays 0, 1 or 2. This parameter is the number of times the P0894 Diagnostic test has identified a
slipping condition. This diagnostic test is required to identify a slipping condition three times in a row in
order to set the DTC P0894 Transmission Component Slipping Diagnostic code.

Transfer Case Ratio

This parameter indicates the ratio of the transfer case calculated by engine speed divided by transmission
output speed based on transmission commanded gear.

Transmission Hot Mode

Displays On or Off. This parameter monitors transmission temperature. On indicates that the transmission
temperature has exceeded 135°C (275°F).

Transmission OSS

The Transmission Output Speed Sensor parameter indicates the rotational speed of the transmission
output shaft expressed as revolutions per minute.

Vehicle Speed

This parameter is the input signal from the vehicle speed sensor assembly.

DIAGNOSTIC TROUBLE CODE (DTC) TYPE DEFINITIONS

The DTC Type Definitions contain the characteristics for all types of DTCs. Each DTC type may or may not be
found in this section. The DTC type is based on the action that the PCM takes when storing DTC information
and whether or not the PCM illuminates a service lamp or displays a message on a driver information center
(DIC). The DTC descriptions in the Diagnostic Trouble Code List/Type are listed in numeric order and indicate
the DTC types for domestic and export vehicle applications. Each DTC is categorized into one of the following
types:

2004 Hummer H2

2004 TRANSMISSION Automatic Transaxle, 4L60-E/4L65-E (Diagnostic Information & Procedures) - Hummer H2

Type A

This DTC is emissions related. The PCM stores the DTC in History, Freeze Frame and Failure Records during
the first trip in which the conditions for setting the DTC are met. The PCM also illuminates the malfunction
indicator lamp (MIL) during the first trip in which the conditions for setting the DTC are met.

Type B

This DTC is emissions related. The PCM stores the DTC in Failure Records during the first trip in which the
conditions for setting the DTC are met. The PCM stores the DTC in History and Freeze Frame during the
second consecutive trip in which the conditions for setting the DTC are met. The PCM also illuminates the MIL
during the second consecutive trip in which the conditions for setting the DTC are met.

Type C

This DTC is non-emissions related. The PCM stores the DTC in History and Failure Records during the first
trip in which the conditions for setting the DTC are met. The PCM does not store the DTC in Freeze Frame and
does not illuminate the MIL. For some type C DTCs, a message may be displayed on a DIC, if equipped. For
other type C DTCs, a separate service lamp, other than the MIL, may be illuminated. Type C DTCs that do not
display a message on the DIC or illuminate a separate service lamp were formerly referred to as type D.

Type X

This DTC is available in the PCM software, but has been disabled, or turned off. In this case, the diagnostic
does not run, DTCs are not stored, and the MIL does not illuminate. Type X DTCs are used primarily for export
vehicles that do not require MIL illumination or DTC storing.

The service information contained in this manual refers to the domestic, federal, calibration package. Domestic
calibrations apply to vehicles sold in the United States, Canada and Japan. Export calibrations exist for both
leaded and unleaded vehicles. DTC types may change for some export vehicles, and some DTCs may be turned
off for leaded export vehicles. Differences between domestic and export calibrations are not reflected on DTC
support information pages. DTC types for export calibrations are referenced only in the Diagnostic Trouble
Code List/Type.

DIAGNOSTIC TROUBLE CODE (DTC) LIST/TYPE

DTC List

DTC

Domestic

Unleaded Export

Leaded Export

DTC P0218

C

C

C

DTC P0502

B

B

C

DTC P0503

B

B

C

DTC P0706

C

C

C

DTC P0711

C

C

C

DTC P0712

C

C

C

DTC P0713

C

C

C

DTC P0719

C

C

C

2004 Hummer H2

2004 TRANSMISSION Automatic Transaxle, 4L60-E/4L65-E (Diagnostic Information & Procedures) - Hummer H2

DTC P0724

C

C

C

DTC P0740

B

B

C

DTC P0741

B

B

C

DTC P0742

B

B

C

DTC P0748

C

C

C

DTC P0751

B

B

C

DTC P0752

B

B

C

DTC P0753

B

B

C

DTC P0756

A

A

C

DTC P0757

A

A

C

DTC P0758

A

A

C

DTC P0785

B

B

C

DTC P0894

B

B

C

DTC P1810

B

B

C

DTC P2761

B

B

C

DTC P2771

B

B

C

2004 Hummer H2

2004 TRANSMISSION Automatic Transaxle, 4L60-E/4L65-E (Diagnostic Information & Procedures) - Hummer H2

2004 TRANSMISSION

Automatic Transaxle - 4L60-E/4L65-E (Troubleshooting)

AUTOMATIC TRANSAXLE (TROUBLESHOOTING)

SYMPTOMS - AUTOMATIC TRANSMISSION

Symptom Diagnosis

Diagnostic Category

Diagnostic Information

This table consists of nine diagnostic categories that are located in the left column. Using this column,
choose the appropriate category based on the operating conditions of the vehicle or transmission. After
selecting a category, use the right column to locate the specific symptom diagnostic information.
Fluid Diagnosis:
This category contains the following topics:

z

Fluid condition - appearance,
contaminants, smell, overheating

z

Line pressure - high or low

z

Fluid leaks

z

Refer to Transmission Fluid Checking
Procedure .

z

Refer to Oil Pressure High or Low .

z

Refer to Fluid Leak Diagnosis , procedure.

z

Refer to Oil Out the Vent .

Noise and Vibration Diagnosis:
This category contains the following topics:

z

Ratcheting noise

z

Noise - drive gear, final drive, whine,
growl, rattle, buzz, popping

z

Vibration

z

Refer to Ratcheting Noise .

z

Refer to Vibration in Reverse and Whining
Noise in Park .

z

Refer to Popping Noise .

z

Refer to Whine Noise Varying with RPM or
Fluid Pressure .

z

Refer to Buzz Noise or High Frequency Rattle
Sound .

z

Refer to Noise in Random Ranges .

Range Performance Diagnosis:
This category contains the following topics:

z

Drives in Neutral

z

No Park

z

No Reverse

z

No Drive

z

No engine braking

z

Shift selector indicator does not match
transmission gear range

z

Lack of Power or Hesitation

z

Refer to Drives in Neutral .

z

Refer to No Park .

z

Refer to No Reverse or Slips in Reverse .

z

Refer to No Drive in All Ranges .

z

Refer to No Drive in Drive Range .

z

Refer to No Overrun Braking - Manual 3-2-1 .

z

Refer to Range Selector Displays Incorrect
Range .

z

Refer to Lack of Power or Hesitation .

Shift Quality (Feel) Diagnosis:
This category contains the following topics:

z

Refer to Harsh Shifts .

2004 Hummer H2

2004 TRANSMISSION Automatic Transaxle - 4L60-E/4L65-E (Troubleshooting)

2004 Hummer H2

2004 TRANSMISSION Automatic Transaxle - 4L60-E/4L65-E (Troubleshooting)