Vanguard 25E300, Repair Manual

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Test Procedures
The Diagnostic Tool can be used to perform a series of actuator tests to check the functionality of specific engine components.
These can only be done with the engine not running. These actuator tests confirm the functionality of the specific component
actuators.
1. Connect the Diagnostic Tool and proceed to the Dashboard. See
SECTION 2 - DIAGNOSTIC INTRODUCTION, Using the
Diagnostic Tool to Read/Clear DTCs, steps 1-12.
2. Select the Actuator Test tab ( A , Figure 6) in the lower left corner of the screen as shown in the inset of the figure below.
3. To ascertain the general health of the engine, check the box in the header ( B ) to the left of Test Name. This action will
cause all the succeeding boxes to be checked. Press Start ( C ) to automatically perform each test in the sequence shown.
If addressing one particular SPN, only check the box of the applicable test, as follows:
DTC Test
SPN 651 FDI Actuation Test
SPN 1268 Ignition Coil Spark Test
SPN 51 and 5419 Electronic Throttle Sweep Test
MIL Lamp Test
SPN 98 Oil Lamp Test
SPN 7753 Starter Motor Actuation Test
4. When the test procedure is finished, the system will display either Pass or Fail in the Test Status column ( D ). If the
test passes then no problem currently exists. If the test fails, proceed to the appropriate diagnostic section for more
information.
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