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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Mirrors) >> Diagnostic Information and Procedures >> DTC B1722 >> Conditions for Clearing the DTC

Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

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 B1722

Step Action Value(s) Yes No
Schematic Reference: Outside Rearview Mirror Schematics 
Connector End View Reference: Mirror Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Place the mirror select switch in the neutral/fold position.
  4. Place the mirror direction switch in both the left/extend and right/retract positions.
Does DTC B1722 set as a current DTC?		 - Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections
3
  1. Connect a test lamp to a good ground.
  2. Backprobe both of the mirror fold motor control circuits one at a time with the test lamp.
Does the test lamp illuminate at either test point?		 - Go to Step 6  Go to Step 4 
4
  1. Connect a test lamp to battery voltage.
  2. Backprobe both of the mirror fold motor control circuits one at a time with the test lamp.
Does the test lamp illuminate at either test point?		 - Go to Step 6  Go to Step 5 
5
  1. Disconnect the power mirror.
  2. Test for continuity through the mirror fold motor and the mirror fold motor control circuits.
Is there continuity?		 - Go to Step 7  Go to Step 6 
6 Inspect for poor connections at the harness connector of the power mirror. Refer to Testing for Intermittent Conditions and Poor Connections .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 8 
7 Inspect for poor connections at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
8 Replace the appropriate power mirror. Refer to Mirror Replacement .
Did you complete the replacement?		 - Go to Step 10  -
9 Replace the appropriate door module. Refer to Control Module References for replacement, setup, and programming.
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
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