Checking the Ignition Switch

Checking Ignition Switch:

1 Connect an ISAT scan tool, contact the SFI system and enter command code EE66. The status of the system will be displayed on the ISAT scan tool. With the ignition switched on, the display should show PAE66 ON.

If no communication can be established with the system, continue with point 4.


2 Check whether voltage is present on terminal 15 of the ignition switch when it is in the Drive position (look at the warning lamps or take a measurement directly on the + 15 terminal).


If voltage is not present, the ignition switch is faulty and must be remedied. If voltage is present on terminal 15, continue as described below.

3 Connect a break-out box to the ECM wiring harness (ECM disconnected) and, with the ignition switched off, check the lead to pin 60 of the ECM for continuity/shorting to ground.


If the lead is not OK, remedy the fault or review "Before Replacing ECM."

4 With the ignition still switched off, check the lead to pin 32 of the ECM for continuity/shorting to ground.


If the lead is not OK, remedy the fault or check the malfunction indicator lamp (MIL).


If the MIL (CHECK ENGINE lamp) is OK, the ECM may be faulty. REview "Before Replacing ECM."