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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 z If the mirror motor control circuits are switched to ground and the mirror motor control circuit is shorted 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 DTC B1544, B1600, or B1605 Step Action Yes No Schematic Reference: Outside Mirror Schematics 1 Did you perform the Door Systems Diagnostic 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
2004 Hummer H2 2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
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