OBD II Monitor Information

Comprehensive Components Monitor

Major Monitors Non Fuel Control AND Non Misfire

Major Monitors Fuel Control AND misfire

(Includes All Engine Hardware Sensor, Switches, Solenoids, etc.)

(Monitors Entire Emission System)

(Monitors Entire System)

Most are one trip Faults

Most are Two Trips Faults

Two Trip Faults

Usually Turns on The Mill and Sets DTC After One Failure

Turns On The Mil and Sets DTC after Two Consecutive Failure

The Mil and Sets DTC After Two Consecutive Failure

Priority 3

Priority 1 or 3

Priority 2 or 4

All Checked For Continuity

Done Stop Test = Yes

Fuel Control Monitor

Open

Oxygen Sensor Heater

Monitors Fuel Control

Short To Ground

Oxygen Sensor Response

System For:

Short To Voltage

Catalytic Converter

Fuel System Lean

Inputs Checked For Rationality

Efficiency Except EWMA

Fuel System Rich

Outputs Checked For Functionality

up to 6 test per trip and a one trip fault (SBEC) and two trip fault on (JTEC)

Requires 3 Consecutive Fuel System Good Trips to Extinguish the MIL

EGR System

Misfire Monitor

Evaporative Emission System (purge and leak)

Monitors for Engine Misfire At:

Non-LDP

4 X 1000 RPM Counter (4000 Revs) (Type B)

LDP

**200 X 3 (600) RPM counter (Type A)⁽²⁾

Requires 3 Consecutive Global Good Trips to Extinguish the MIL* ⁽¹⁾

Requires 3 Consecutive Global Good Trips to Extinguish the MIL*⁽¹⁾

Requires 3 Consecutive Global Good Trips to Extinguish the MIL

⁽¹⁾	*40 Warm Up Cycles are required to erase DTCs after the MIL has been extinguished

⁽²⁾	** Type A misfire is a one trip failure on pre-1999, 2 trip failure on 1999 and later. The MIL will illuminate at the first or second failure, based on MY.