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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Air Suspension) >> Diagnostic Information and Procedures >> DTC B2795 >> Test Description

Test Description

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.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step tests for normal scan tool data parameters.
  2. 3:  This step tests for data parameter change with scan tool.
  3. 4:  This step tests the signal circuit to be inactive.
DTC B2795

Step Action Yes No
Schematic Reference: Air Suspension Schematics 
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. With a scan tool, observe the ERH Switch parameter in the data list for the air suspension module.
Does the scan tool display released?		 Go to Step 3  Go to Step 4 
3 
  1. Activate the ERH switch.
  2. With the scan tool, observe the ERH Switch parameter.
Does the ERH Switch parameter change state?		 Go to Diagnostic Aids Go to Step 4 
4 
  1. Turn OFF the ignition.
  2. Disconnect the ERH switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the ERH Switch parameter.
Does the scan tool display released?		 Go to Step 7  Go to Step 5 
5 Test the signal circuit of the ERH switch for a short to battery, ground or an open circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 10  Go to Step 6 
6 Inspect for poor connections at the harness connector of the air suspension module. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .
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 ERH Switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 10  Go to Step 9 
8
  1. Replace the air suspension module. Refer to Control Module References .
  2. Perform the trim height calibration procedure for the air suspension module if necessary after check trim height procedure.
Did you complete the replacement?		 Go to Step 10  -
9 Replace the ride height switch. Refer to Electronic Suspension Switch 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.
Does the DTC reset?		 Go to Step 2  System OK
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