Table 2-2. Prompting Messages
Signal to ECT switches. Vehicle ID numbers are found under TEST DATA on the flip
card, on the vehicle test cards.
Signal to technician to crank engine in compression balance or first peak tests.
Signal to technician to stop cranking in compression balance test or to release the
accelerator in the CI ower test.
Signal to the technician to release the TEST button during an offset test.
Numbers are used for prompting messages in several tests. In confidence test, a readout
of 66 signals the technician to dial in 99. In test no. 12, the first numerical readout signals
the technician to shut off fuel.
Table 2-3. Error Readouts
Occurs if you request the VTM for information it does not have. For example, if you
request the vehicle ID and it has not been entered.
Occurs in either the DCA or TK mode of operation. It indicates that a non-existent test
number has been dialed into the TEST SELECT switches.
Indicates that the required transducer is not connected.
Indicates that a test number has been dialed which does not apply to the vehicle under
test. It can only occur in the DCA mode.
Indicates that a vehicle identification number or number of cylinders information has not
Indicates that the transducer offset test was not performed.
Indicates a conflict between the vehicle identification number (VID) dialed in the the
number of cylinders dialed in. It may occur in response to either VID entry or number-of-
Indicates the VTM is not receiving the required voltage signal for the test selected. This
error code is related only to starter and compression balance tests.
Indicates that the engine was not running at the start of the test.
Indicates that a wrong vehicle identification number was dialed into the VTM.
Indicates that throttle control was operated incorrectly during power test taking too much
time to either accelerate or decelerate.
Indicates bad data were taken for the test in progress. Repeat the test one (1) time.
Indicates that a wrong number of cylinders was dialed into the VTM.
Indicates that an engine RPM or AC frequency test was terminated automatically to
protect the VTM. Termination is only after several minutes of no-signal operation. Most
likely the VTM was left on the vehicle and the engine stalled.