Scan Tool Testing and Procedures

To confirm a break in the wiring or a poor connection between a blade and terminal at a connector. use Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent to test receiver assembly circuit inputs. Follow these steps:

1. Turn ignition switch to ON position.

2. Connect the NGS Tester.

3. Select the vehicle type, Data Link, RAP, ACTIVE COMMANDS

4. Select PID LATCH

5. Select PIDs

6. Select the input(s) to be monitored, LATCHIO and then START.

7. Press or activate the switch on the circuit in question and keep it in its active state.

LATCHIO is the latch input/output PID. At this point it counts the number of times that any input or output changes state. All other inputs will lock on the first change in state that is seen while on this PID LATCH screen.

8. Wiggle the wire at the point where connection is questionable.

The LATCHIO PID keeps count of all state changes (even after the specific input looks on the first change in value). If there is a loose connection, the LATCHIO number increase quickly as the wire is wiggled.