Figure 2-2. Vehicle DCA Connector
The GO and NO-GO-Chain sequences are presented as illustrated flow charts with test branching controlled by
YES and NO decisions. Generally, a YES determination leads to the next test; a NO determination leads to NO-GO
testing and corrective action.
When the VTM interfaces with the vehicle through the DCA connector the test is titled DCA Mode Testing. If the
VTM interfaces with the vehicle through the use of the Transducer Kit (TK), the test is titled TK Mode Testing. The DCA
and TK testing modes can be used at the same time.
Rules For Following GO-Chain Test Sequence.
Always start at GO1. Never enter the middle of a GO or NO-GO testing sequence unless directed by the
Follow each instruction in a GO-Chain Test Sequence. Do not skip any instructions or procedures.
If a particular test has failed in a GO-Chain test sequence, proceed to the indicated NO-GO-Chain test
sequence or to a higher level of maintenance.
After correcting a vehicle problem, repeat the testing beginning at GO1.
Each GO Chain testing sequence depends upon the completion of the previous test. Do not skip any tests.