B0608

CIRCUIT DESCRIPTION




The IPC monitors the ignition 0 voltage circuit, the ignition 1 voltage circuit, and the crank voltage circuit. The ignition 0 voltage circuit is active (circuit is high) when the ignition switch is in accessory, on, or start. The ignition 1 circuit is active (circuit is high) when the ignition switch is in on or start. The crank voltage circuit is active (circuit is high) when the ignition switch is in start.

CONDITIONS FOR RUNNING THE DTC
The ignition is on or in the crank position.

CONDITIONS FOR SETTING THE DTC
^ The IPC detects that the ignition 1 voltage circuit is active and the ignition 0 circuit is inactive.
^ The IPC detects that the crank voltage circuit is active and the ignition 0 voltage circuit is inactive.
^ The IPC detects that the crank voltage circuit is active and the ignition 1 voltage circuit is inactive.
^ One of the above conditions is present for greater than 0.3 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The IPC illuminates the SERVICE VEHICLE SOON indicator.

CONDITIONS FOR CLEARING THE DTC
^ The current DTC clears when the conditions for setting the DTC are no longer present.
^ The history DTC clears after 100 malfunction free ignition cycles.
^ The IPC receives a clear code command from the scan tool.

DIAGNOSTIC AIDS
^ Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.
^ The table below shows the ignition switch positions and the corresponding states of the circuits.

TEST DESCRIPTION

Steps 1-10:

The number(s) below refer to the step number(s) on the diagnostic table.
5. Test the entire ignition voltage circuit, which includes the ignition switch and the fuses.
6. Test the entire crank voltage circuit, which includes the ignition switch and the fuse.
7. Test the entire ignition 1 voltage circuit, which includes the ignition switch and the fuse.