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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1430 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> DTC B2697: Headlamp Washer Request Circuit >> Test Description

Test Description

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

  1. 2:  This step verifies that the fault is current.
  2. 3:  This step verifies the switch input to the BCM.
  3. 4:  This step determines if the fault is in the headlamp washer switch. If the switch input to the BCM changes to an inactive state when disconnected the switch contacts are stuck or shorted to ground.
DTC B2697 Diagnostic Test

Step Action Yes No
Schematic Reference:  Wiper/Washer System Schematics  
Connector End View Reference:  Wiper/Washer System Connector End Views  
1 Did you perform the Wiper/Washer System Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Wiper/Washer 
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the headlamp washer switch parameter in the body control module (BCM) inputs data list.
Does the scan tool display OFF?		 Go to Step 3  Go to Step 4 
3 
  1. Activate the headlamp washer switch.
  2. With the scan tool, observe the headlamp washer switch parameter.
Does the headlamp washer switch parameter change state?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 4 
4 
  1. Turn OFF the ignition.
  2. Disconnect the headlamp washer switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the headlamp washer switch parameter.
Does the scan tool display OFF?		 Go to Step 7  Go to Step 5 
5 Test the signal circuit of the headlamp washer switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
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 body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
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 headlamp washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 10  Go to Step 9 
8
IMPORTANT: Perform the setup procedure for the BCM.
Replace the BCM. Refer to Body Control Module Replacement in Body Control System.Did you complete the replacement?		 Go to Step 10  -
9 Replace the headlamp washer switch.
Did you complete the replacement?		 Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the system in order to verify the repair.
Does the DTC reset?		 Go to Step 2  System OK
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