Ford Transit 2002 Owner's Manual page 1151

EGR Monitor (Vehicles with diesel engine)
The functionality of the EGR system is checked by comparing either the MAP sensor output
or EGR valve lift potentiometer output (depending upon application) with expected values.
Turbocharger Boost Pressure Monitor (Vehicles with variable vane turbocharger)
The functionality of the turbocharger is determined by measuring the MAP sensor output
under selected operating conditions. The output value is then compared with expected
values.
Diagnostic Requirements
Vehicles equipped with EOBD, can be diagnosed using the Worldwide Diagnostic System
(WDS). In order for the EOBD system to be invoked, a number of criteria must be met.
Together these make up a drive cycle. After any repair, which could affect emissions, a
dealer test cycle must be carried out on the vehicle, to make sure that engine management
system operates correctly.
Malfunction Indicator Lamp (MIL)
The MIL is located in the instrument cluster and is fitted to alert the driver to the fact that
an abnormal condition has developed in the engine management system, that is having an
adverse effect on emissions. In cases of misfires which are likely to cause catalytic
converter damage, it flashes immediately. With all other faults it will illuminate continuously
from the second trip after the condition occurred. Under normal operation it should
illuminate at key-on and go out almost as soon as the engine is started.
Diagnostic Trouble Codes (DTCs)
The DTCs given by the PCM are standardized, which means that generic scan tools can read
results from all vehicles.
The DTC is always a 5 digit alphanumerical code, for example "P0100".
The first digit of a code (letter) identifies the system which has set the code. Provision
has been made for a total of four systems to be identified although only the 'P' code is
required for EOBD.
- 'B' for the body
- 'C' for the chassis
- 'P' for the powertrain
- 'U' for the network communications systems
All of the "x0xxx" codes are standardized codes. However, any manufacturer can use
additional codes over and above the standardized codes. These will be labelled "x1xxx",
"x2xxx" and so on.
The third digit of a code (numeric) identifies the sub-system which has set the code.
- 'Px1xx' for metering of fuel and air supply
- 'Px2xx' for metering of fuel and air supply
- 'Px3xx' for ignition system – combustion misfires
- 'Px4xx' for auxiliary emission control equipment
- 'Px5xx' for vehicle speed, idle setting and other related inputs
- 'Px6xx' for trip computer and other related outputs
- 'Px7xx' for transmission.
- 'Px8xx' for transmission.
- 'Px9xx' category to be determined
- 'Px0xx' category to be determined
When a concern occurs, the actions taken include storage of the relevant information and
actuation of the MIL occurs in line with the relevant legislation.
Inspection and Verification
1. 1. Verify the customer concern by operating the system.
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