Positive Crankcase Ventilation System Overview

POSITIVE CRANKCASE VENTILATION SYSTEM CHART

Numeric Code	Generic Description	Expanded Description
NORMAL PCM RESPONSES
00	Genera affirmative	PCM received a valid request from scan tool.
62	Normal exit without test results	PCM performed a valid request from scan tool and has no results (i.e., KOEO Self-Test performed with no DTCs recorded).
61	Normal exit with test results	PCM performed a valid request from scan tool and has results (i.e., KOEO Self-Test was performed and a DTC was recorded).
ABNORMAL PCM RESPONSES
10	General reject	PCM will not respond to request.
11	Mode not supported	PCM is not capable of performing a requested test (i.e., turn injectors on and off).
12	Invalid data format	An unrecognized character is inserted into a string of data.
21	PCM is busy at time of request	PCM is already performing a test at the time another test is requested.
22	Entry conditions not correct	Usually operator error (i.e., engine not running or in gear when requesting KOER Self-Test).
23	Asked for results before done	A message was received by the PCM but the PCM is not ready to respond.
50	Upload not accepted	A request for information or a test cannot be accomplished due to a fault condition.
63	Abnormal exit with results	While PCM is performing a test, an error occurred, but PCM has results (i.e., DTCs).
64	Abnormal exit without results	While PCM is performing a test, an error occurred and no results are available (i.e., aborted KOER Self-Test before DTC was recorded).