Ford Transit 2002 Owner's Manual page 1025

The vehicle must have petrol present in the fuel tank at all times. Failure to follow this
instruction may result in damage to the vehicle.
NOTE: The engine will not use LPG until a minimum coolant temperature of 10 degrees
centigrade has been reached.
NOTE: If a weak LPG mixture is detected by the alternative fuel control module (AFCM)
then the system automatically switches over to petrol to prevent overheating of the
catalytic converter.
1. 1. Verify the customer concern.
2. 2. If the concern is present in both LPG and petrol operation, refer to fuel charging
and controls.
REFER to: Fuel Charging and Controls
Duratec-DOHC (85kW/115PS) - Zetec, Diagnosis and Testing).
If the concern is only present when switched to LPG, proceed to the next step.
3. 3. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Mechanical
Fuel filter element(s)
LPG distributor
LPG fuel vaporizer
LPG fuel injector(s)
Vacuum lines
Fuel Tank valves
LPG fuel line(s)
4. 4. If an obvious cause for an observed or reported concern is found, correct the cause
(if possible) before proceeding to the next step.
5. 5. If the concern is not visually evident, verify the symptom and refer to the
Diagnostic Trouble Code DTC Index Chart.
Diagnostic Trouble Codes (DTC's) Index Chart
NOTE: The WDS must be used to communicate with the AFCM. It is not possible to use
the IDS to communicate with the AFCM.
NOTE: The secondary data link connector (DLC) must be used for alternative fuel system
diagnostics. On left-hand drive vehicles the secondary DLC is located behind the glove
compartment. On right-hand drive vehicles the secondary DLC is located below the
steering column behind the primary DLC.
NOTE: The WDS will only communicate with the AFCM if the petrol fuel pump relay is
removed and pins 3 and 5, harness side, are bridged with a 10 amp fused jumper wire.
1. 1. Remove the petrol fuel pump relay.
2. 2. Install a 10 amp fused jumper wire between pins 3 and 5 of the petrol fuel pump
relay, harness side.
3. 3. Connect the WDS to the secondary DLC and follow the AFCM self test help screen.
4. 4. Retrieve any DTC's and refer to the DTC Index Chart.
(303-04A Fuel Charging and Controls - 1.8L
Electrical
Fuse(s)
Relay(s)
Circuit(s)
Wiring harness
Electrical connector(s)
Throttle position (TP) sensor
Manifold absolute pressure (MAP) sensor
LPG select switch
Fuel injection supply manifold stepper motor
Fuel tank solenoid(s)
AFCM
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