Initial Inspection and Diagnostic Overview

OBD II MONITORING CONDITIONS:
When testing for DTC reoccurrence, it can be determined if the Service Drive Cycle was of sufficient length by performing a PDU "Systems Readiness Test".

The Systems Readiness test is accessed via the PDU menu structure. PDU will report if any portion of the Systems Readiness Test has not been completed in the following manner:

The following less frequently performed tests are identified as incomplete:
Module $11 (identifies EMS ECM)
Catalyst
Evaporative purge system
O2 sensor
O2 sensor heaters

Further confirmation of the System Readiness Test status is available by retrieving the logged DTCs.

If DTC P1000 is logged in memory, the on-board diagnostic tests have not been completed.

If DTC P1111 is logged in memory, all on-board diagnostic tests have been completed.

NOTES
MONITORING CONDITIONS
"SERVICE DRIVE CYCLE" for the particular DTC. Operate the vehicle as described to check for a reoccurrence of the DTC.

OBD II
Y YES - indicates that the DTC is an OBD II DTC.
N NO - indicates that the DTC is a non OBD II DTC.

CHECK ENGINE MIL (CK ENG)
1 1 TRIP - indicates that the CHECK ENGINE MIL is activated by a fault occurring during ONE "TRIP".
2 2 TRIPS - indicates that the CHECK ENGINE MIL is activated by a fault occurring during TWO CONSECUTIVE "TRIPS".
N NO - indicates that the CHECK ENGINE MIL is not activated

OTHER
N None
1 1 "TRIP" to activate indicator(s).
2 2 CONSECUTIVE "TRIPS" to activate indicator(s).
R RED MIL
A AMBER MIL
M MESSAGE

DEFAULT ACTION
ECM default action
Logged - DTC stored in memory buffer.
Flagged - DTC stored in memory / CHECK ENGINE MIL activated.

POSSIBLE CAUSES
HIGH VOLTAGE - High voltage can be either EMS sensor supply voltage (5 volt) or B+ voltage.

REFERENCE: It is recommended that the applicable Electrical Diagram be referenced when using the information contained in this summary.

NOTE: For additional "P" Codes not listed in this summary, refer to the Transmission Control DTC Summary. For code P0335, refer to the climate control system trouble code summary.