Hummer H2. Manual - part 567
2
z
Powertrain control module
z
Body control module
z
Driver door module
z
Passenger door module
z
Driver seat module
Does the scan tool communicate with
the listed control modules?
Go to Step 3
Go to Scan Tool Does Not
Communicate with Class 2
Device in Data Link
Communications
3
1. Access the Class 2 Power Mode
in the Diagnostic Circuit Check
on the scan tool.
2. Rotate the ignition switch
through all of the positions while
observing the ignition switch
power mode parameter.
Do the ignition switch power mode
parameter readings match the actual
ignition switch positions?
IMPORTANT:
The engine may start during the
following step. Turn off the engine as
soon as you have observed the
Crank power mode.
Go to Step 4
Go to Power Mode
Mismatch in Body Control
System
4
Select the display DTCs function on
the scan tool for the following control
modules:
z
Powertrain control module
z
Body control module
z
Driver door module
z
Passenger door module
z
Driver seat module
Does the scan tool display any DTCs?
Go to Step 5
Go to Symptoms - Seats
5
Does the scan tool display any DTC
that begins with a "U"?
Go to Scan Tool Does Not
Communicate with Class 2
Device in Data Link
Communications
Go to Step 6
6
Does the scan tool display B1000?
Go to Diagnostic Trouble
Code (DTC) List in Body
Control System
Go to Step 7
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Seats - Hummer H2