Hummer H2. Manual — part 430
control, memory recall or mirror tilt in reverse functions.
Conditions for Running the DTC
z
System voltage must be between 9.0-16.0 volts.
z
The mirror motor control circuits must be active.
Conditions for Setting the DTC
z
If the mirror motor control circuits are switched to battery voltage and the mirror motor control circuit is
shorted to ground.
z
If the mirror motor control circuits are switched to ground and the mirror motor control circuit is shorted
to battery voltage.
Action Taken When the DTC Sets
The outside rearview mirror will not operate properly on all axes.
Conditions for Clearing the DTC
When the fault is no longer present, the door module changes the current DTC to a history DTC. The door
module will clear the history DTC after 50 fault free ignition cycles, or in response to a scan tool command.
DTC B1544, B1600, or B1605
Step
Action
Yes
No
Schematic Reference: Outside Mirror Schematics
Connector End View Reference: Power Door Systems Connector End Views
1
Did you perform the Door Systems Diagnostic
System Check?
Go to Step 2
Go to Diagnostic
System Check -
Door Systems
2
1. Turn ON the ignition, with the engine OFF.
2. Activate the mirror switch in the up, down left
and right positions.
Does the mirror move properly with each activation?
Go to Testing for
Intermittent Conditions
and Poor Connections in
Wiring Systems
Go to Step 3
3
1. Turn OFF the ignition.
2. Disconnect the mirror from the appropriate
door module.
3. Turn ON the ignition, with the engine OFF.
4. Probe each of the mirror motor down, right and
up/left control circuit pins at the door module
one at a time with a test lamp that is connected
to a good ground.
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
DTC B1580, B1590, B1610, OR B1620
Did the test lamp illuminate at any of the test points?
Go to Step 7
Go to Step 4
4
1. Connect a test lamp between the mirror motor
down control circuit pin and a good ground.
2. Activate the mirror switch to the down
position.
Does the test lamp illuminate?
Go to Step 5
Go to Step 8
5
1. Connect a test lamp between the mirror motor
right control circuit pin and a good ground.
2. Activate the mirror switch to the right position.
Does the test lamp illuminate?
Go to Step 6
Go to Step 8
6
1. Connect a test lamp between the mirror motor
up/left control circuit pin and a good ground.
2. Activate the mirror switch to the up and left
positions.
Does the test lamp illuminate?
Go to Step 7
Go to Step 8
7
Inspect for poor connection at the harness connector
of the appropriate door module. Refer to Testing for
Intermittent Conditions and Poor Connections in
Wiring Systems.
Did you find and correct the conditions?
Go to Step 10
Go to Step 9
8
Replace the appropriate door module. Refer to
Switch Replacement - Door Lock and Side
Window - Driver or Switch Replacement - Door
Lock and Side Window - Passenger .Did you
complete the replacement?
IMPORTANT:
perform the set up procedure for the appropriate
door module. Refer to Service Programming
System (SPS) in Programming.
Go to Step 10
-
9
Replace the mirror. Refer to Mirror Replacement .
Did you complete the replacement?
Go to Step 10
-
10
1. Use the scan tool in order to clear the DTCs.
2. Operate the vehicle within the Conditions for
Running the DTC as specified in the
supporting text.
Does the DTC reset?
Go to Step 2
System OK
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
Circuit Description
The mirror horizontal and vertical position sensors are potentiometers. The Driver Door Module (DDM) and
Passenger Door Module (PDM) provide these sensors with a 5 volt reference circuit and a low reference circuit.
The DDM/PDM monitors the horizontal and vertical position sensor signal circuits which change values based
on mirror position. These voltage values are used to determine mirror position and can be set into memory.
When the DDM/PDM receives a memory recall request, the DDM/PDM will control the power mirror to the
memory position based on the horizontal and vertical position sensor signal values.
Conditions for Running the DTC
Battery voltage must between 9.0-16.0 volts.
Conditions for Setting the DTC
The horizontal and/or vertical position sensor signal(s) are greater than 4.75 volts or less than 0.50 volts.
Action Taken When the DTC Sets
Memory movements on the malfunctioning axis are disabled.
Conditions for Clearing the DTC
When the fault is no longer present, the DDM/PDM changes the current DTC to a history DTC. The
DDM/PDM will clear the history DTC after 50 fault free ignition cycles.
Diagnostic Aids
z
If DTC B1580 is set by itself, the left horizontal position sensor signal circuit maybe open, shorted to
ground or battery
z
If DTC B1590 is set by itself, the left vertical position sensor signal circuit maybe open, shorted to
ground or battery
z
If DTC B1610 is set by itself, the right horizontal position sensor signal circuit maybe open, shorted to
ground or battery
z
If DTC B1620 is set by itself, the right vertical position sensor signal circuit maybe open, shorted to
ground or battery.
z
If DTCs B1580 and B1590 are both set, the left 5 volt reference or low reference circuit(s) maybe open,
shorted to ground or battery.
z
If DTCs B1610 and B1620 are both set, the right 5 volt reference or low reference circuit(s) maybe open,
shorted to ground or battery.
DTC B1580, B1590, B1610, or B1620
Step
Action
Value
(s)
Yes
No
Schematic Reference: Outside Mirror Schematics
Connector End View Reference:Power Door Systems Connector End Views
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
1
Did you perform the Door Systems Diagnostic
System Check?
-
Go to Step 2
Go to
Diagnostic
System Check -
Door Systems
2
1. Install a scan tool.
2. Turn ON the ignition, with the engine
OFF.
3. With the scan tool, observe the mirror
horizontal and vertical position
parameters in the Driver Door Module
(DDM) and Passenger Door Module
(PDM) data lists.
4. Operate both the left and right mirrors
through the full range of movements.
Does the scan tool indicate that the left and right
mirror horizontal and vertical position
parameters are within the specified range?
0.50-
4.75 V
Go to Testing for
Intermittent
Conditions and Poor
Connections in Wiring
Systems
Go to Step 3
3
Is there a horizontal and vertical DTC set on the
same mirror?
-
Go to Step 6
Go to Step 4
4
1. Turn OFF the ignition.
2. Disconnect the appropriate mirror.
3. Turn ON the ignition, with the engine
OFF.
4. With a scan tool, observe the appropriate
mirror position parameter.
Does the scan tool indicate that the mirror
position parameter is less than the specified
value?
0.50 V
Go to Step 5
Go to Step 8
5
1. Turn OFF the ignition.
2. Connect a 3 amp fused jumper wire
between the 5 volt reference circuit and
the mirror position signal circuit of the
appropriate mirror position sensor at the
mirror harness connector.
3. Turn ON the ignition, with the engine
OFF.
4. With a scan tool, observe the mirror
position parameter.
Does the scan tool indicate that the mirror
position parameter is within the specified range?
4.75 -
5.25 V
Go to Step 12
Go to Step 9
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
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