TR Switch
This parameter indicates the current state of the gear select switch on the transmission/transaxle as
calculated by the control module based on the TR switch. The scan tool status will switch from High to
Low as different combinations are met. On the scan tool in Park, the PRNDL would read P and A will be
Low, and B and C will be High.
Traction Control Signal
This parameter displays the current status of the traction control system. The scan tool will display
ACTIVE if the traction control system is operating. The scan tool will display INACTIVE if the traction
control system is not requested because of a wheel slippage condition.
Vehicle Speed Sensor
This parameter indicates the vehicle speed calculated by the control module based on an input from the
vehicle speed sensor (VSS). The scan tool will display a high value at higher vehicle speeds, and a low
value at lower vehicle speeds.
VTD Auto Learn Timer
The scan tool displays Active/Inactive. This parameter indicates if the control module is ready to learn the
theft deterrent password. The scan tool will display active if the system is ready to learn. The scan tool
will display inactive if the system has timed out or is not ready to learn the password.
VTD Fuel Disable
This parameter Indicates if the VTD module has received proper information to enable or disable fuel.
The scan tool will display Active or Inactive. The scan tool will display Active if the control module does
not receive the correct password from the BCM. The scan tool will display Inactive if the control module
receives the correct password from the BCM. If the system is Active, the engine will not start.
VTD Fuel Disable Until Ignition Off
The scan tool displays Yes or No. With the ignition ON and a VTD code present, the scan tool displays
Yes.
Warm-ups w/o Emission Faults
The scan tool displays in counts. This parameter counts the number of warm up cycles without an
emission fault present. The parameter increments until a fault occurs. If a fault occurs, the counter reverts
to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the PCM also
resets the counter to 0.
Warm-ups w/o Non-Emission Faults
The scan tool displays in counts. This parameter counts the number of warm up cycles without a non-
2004 Hummer H2
2004 ENGINE PERFORMANCE Engine Controls (Diagnostic Information & Procedures) - 4.8L, 5.3L, and 6.0L -
Hummer H2