Ford Transit 2002 Owner's Manual page 1033

B5: CHECK CIRCUITS 15-RN4, 15-RN5, 15-RL10A, 15-RL11A, 15-RL12A AND 15-
RL13A FOR OPEN
B6: CHECK CIRCUIT 15-RH28 FOR POWER
B7: CHECK THE LPG MAIN RELAY
B8: CHECK CIRCUIT 91S-RH27 FOR OPEN
Disconnect LPG main relay C725.
1
Measure the resistance between the following
2
electrical connectors.
LPG fuel injector C671 pin 1, harness side and
LPG main relay C725 pin 5, harness side.
LPG fuel injector C672 pin 1, harness side and
LPG main relay C725 pin 5, harness side.
LPG fuel injector C673 pin 1, harness side and
LPG main relay C725 pin 5, harness side.
LPG fuel injector C674 pin 1, harness side and
LPG main relay C725 pin 5, harness side.
Are the resistances less than 5 ohms?
Yes
GO to B6.
No
REPAIR the circuit(s), TEST the system for normal
operation.
Ignition switch in position II.
1
Measure the voltage between LPG main relay C725
2
pin 3, circuit 15-RH28 (GN/OG), harness side and
ground.
Is the voltage greater than 10 volts?
Yes
GO to B7.
No
REPAIR the circuit, TEST the system for normal
operation.
Ignition switch in position 0.
1
Carry out the relay component test on LPG main
2
relay K274.
Does the LPG main relay pass the component test?
Yes
GO to B8.
No
INSTALL a new LPG main relay, TEST the system
for normal operation.
Disconnect AFCM C405.
1
Measure the resistance between AFCM C405 pin 10,
2
circuit 91S-RH27 (BK/GN), harness side and LPG
main relay C725 pin 2, circuit 91S-RH27 (BK/GN),
harness side.
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