U1192

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
The PCM monitors the serial data (class II) circuit for communications from the Passlock/EVC controller. If the Passlock/EVC controller is not communicating with the PCM this DTC will set.

CONDITIONS FOR SETTING THE DTC
No serial data (class II) from Passlock/EVC controller to the PCM.

ACTION TAKEN WHEN THE DTC SETS
This DTC will not illuminate the MIL.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A History DTC will clear after 40 consecutive warm up cycles with no failures of any non-emissions related diagnostic test.
^ PCM battery voltage is interrupted.
^ Use of a scan tool.

DIAGNOSTIC AIDS
This DTC will not set unless the PCM and ATC controllers have already establish communications first. This DTC will only diagnosis an open or intermittent connection from the Passlock/EVC controller to the splice.

The PCM enables fuel (scan tool display PCM in VTD Fail Enable YES) on this and future ignition cycles only if the failure occurred when the engine was running.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
1. In this step, the Powertrain OBD System Check is being performed.