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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1852 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC B0688 >> Conditions for Clearing the MIL/DTC

Conditions for Clearing the MIL/DTC

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
DTC B0688

Step Action Yes No
Schematic Reference: Theft Deterrent System Schematics
Connector End View Reference: Vehicle Access Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Turn ON the ignition, with the engine OFF.
  2. With the scan tool, command the security indicator ON and OFF.
Does the security indicator turn ON and OFF with each command?
Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 Test for a short to battery in the security indicator control circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 6  Go to Step 4 
4 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 .
Did you find and correct the condition?
Go to Step 6  Go to Step 5 
5 Replace the BCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?
Go to Step 6  -
6 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 1