Ford Transit 2002 Owner's Manual page 1106

The PCV system consists of a crankcase vent oil separator connected to the crankcase and
valve cover by hoses.
The crankcase pressure is controlled by a diaphragm operated PCV valve built into the valve
cover and cannot be removed. As the pressure in the crankcase vent oil separator reduces,
the diaphragm valve closes against the force of the PCV valve spring, so closing the PCV
valve. As the crankcase pressure rises, the PCV valve is pushed open assisted by the PCV
valve spring. This allows the positive crankcase gasses to be scavenged by the air intake
system.
Inspection and Verification
1. 1. Verify the customer concern.
2. 2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Mechanical
Crankcase vent oil separator
3. 3. If an obvious cause for an observed or reported concern is found, correct the cause
(if possible) before proceeding to the next step
4. 4. If the cause is not visually evident, verify the symptom and refer to the diagnostic
trouble code (DTC) Index Chart.
Diagnostic Trouble Code (DTC) Index Chart
DTC Description/Condition
P1402 EGR metering orifice restricted EGR valve stuck closed or leaking GO to Pinpoint Test
1. 1. If no DTCs are retrieved, verify the symptom and refer to the Symptom Chart.
Symptom Chart
Symptom Possible Sources
Excessive * EGR valve.
exhaust black
smoke
Excessive * Blocked or damaged
crankcase PCV hose(s).
pressure * Blocked crankcase
vent oil separator.
* Worn or damaged
engine components.
Pinpoint Tests
PINPOINT TEST A : EXCESSIVE EXHAUST BLACK SMOKE
TEST
CONDITIONS
A1: CHECK THE EGR VALVE
Using the WDS, CHECK for DTC P1402.
1
EGR valve
EGR cooler
Gasket(s)
PCV hoses
Possible Source
* GO to Pinpoint Test
* GO to Pinpoint Test
* REFER to:
Duratorq-TDCi (Lynx) Diesel/1.8L Duratorq-TDDi
(Lynx) Diesel, Diagnosis and Testing).
DETAILS/RESULTS/ACTIONS
http://vnx.su
Electrical
Electrical connector
Wiring harness
Action
A.
B.
Engine (303-01B Engine - 1.8L
Action
A.